OPERATOR'S MANUAL - Kuttermesser | Schleifmaschinen · PDF fileApplicable harmonised...

OPERATOR'S MANUAL

Universal Wet Grinding Machine USK 160 S Version dated 11.2014

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EC Declaration of Conformityin accordance with the EC Directive 2006/42/EC

• Machinery Directive 2006/42/EC• Electromagnetic Compatibility Directive 2004/108/EC

We hereby declare that the machine mentioned below fulfils the basic health and safety requirements of the relevant EC Directive by virtue of the machine's construction and design and the version placed by us on the market.

This declaration becomes void if the machine is modified in any way without our consent.

Designation of the machine: Universal Wet Grinding MachineType designation: USK 160 S

Applicable harmonised standards, DIN EN 12100-1in particular: DIN EN 12100-2 DIN EN 60204-1 ISO 13857 DIN EN 349

Person responsible for documentation: Peter Heine (Dipl. Ing. Mechanical Engineering BA) Phone +49-7527-928-15

Manufacturer: Knecht Maschinenbau GmbH Witschwender Straße 26 88368 Bergatreute Germany www.knecht.eu

Complete technical documentation is available.

The operator's manual for the machine is available in its original version and in the native language of the user.

Bergatreute, 03.11.2014 Managing Director–––––––––––––––––––––––––– –––––––––––––––––––––––––––– –––––––––––––––––––––Place, date Signature Signatory details

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Manufacturer

Knecht Maschinenbau GmbHWitschwender Str. 2688368 BergatreuteGermany

Phone +49-7527-928-0Fax +49-7527-928-32

Email [email protected]

Documents for the machine operator

Operator's Manual

Date of issue of the operator's manual

November 3rd, 2014

Copyright

The copyright for this operator's manual as well as other documents for the machine operator is held by Knecht Maschinenbau GmbH. These documents will be delivered only to our customers and to operators of our products and are a part of the machine.

These documents may neither be reproduced, nor made accessible to third parties, including rival firms.

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1. Important Notes 7

1.1 Preliminary remarks 7 1.2 Warnings and symbols used in the operator's manual 7 1.3 Warning labels on the grinding machine and their meanings 8 1.4 Type plate and machine number 9 1.5 Figure and item numbers in the operator's manual 9

2. Safety 10

2.1 Basic safety instructions 102.1.1 Follow the instructions in the operator's manual 102.1.2 Operator's duty 102.1.3 Worker's duty 102.1.4 Hazards associated with the handling of the machine 102.1.5 Faults 11

2.2 Proper Use 11 2.3 Warranty and Liability 12 2.4. Safety Instructions 12

2.4.1 Organisational measures 122.4.2 Protective devices 122.4.3 Informal safety measures 132.4.4 Personnel selection, personnel qualification 132.4.5 Machine control system 132.4.6 Safety measures in normal operation 132.4.7 Hazards from electrical power sources 142.4.8 Particular danger zones 142.4.9 Servicing (maintenance, repair), fault elimination 142.4.10 Structural modifications of the grinding machine 142.4.11 Cleaning the grinding machine 152.4.12 Oils and greases 152.4.13 Site change of the grinding machine 15

3. Intended Purpose 16

3.1 Intended Purpose 16 3.2 Technical Data 16 3.3 Functional Description 17 3.4 Assembly group description 18

4. Transport 19

4.1 Means of transport 19 4.2 Transport damage 19

Table of Contents

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4.3 Transport to another installation site 19

5. Installation 20

5.1 Selection of qualified personnel 20 5.2 Installation site 20 5.3 Supply connections 20 5.4 Settings 20 5.5 Installing the grinding machine 21

6. Initial operation 22

7. Operation 23

7.1 General principles of grinding technology 23 7.2 Grinding of cutter blades on the grinding belt 24 7.3 Grinding of hand knives on the grinding belt 30 7.4 Polishing and deburring with the polishing brush 31 7.5 Deburring with the wet-honing disc 33 7.6 Sharpening of cutlery knives on the water-cooled

serrated edge grinding disc 34 7.7 Replacing the grinding belt 36 7.8 Belt control 37 7.9 Coolant unit 38

7.9.1 Belt cooling 387.9.2 Cooling of the flap wheel or the water-cooled serrated edge grinding disc 397.9.3 Closing the water nozzle during dry polishing 39

8. Maintenance & Care 40

8.1 Grinding materials 40 8.2 Cleaning 41 8.3 Lubrication 41

Table of Contents

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1.1 Preliminary remarks This operator's manual is meant to make it easier to get to know the grinding machine and to use it properly for the intended purpose. The operator's manual contains important instructions on how to operate the grind-ing machine safely, properly and cost-effectively. Observance of these instructions helps to avoid dangers, repair costs and downtimes, and increases the reliability and service life of the grinding machine. The operator's manual must always be accessible at the place of use of the grinding machine. The operator's manual must be read and used by all persons entrusted with working on the grinding machine, e.g. those entrusted with - transportation, installation, commissioning - operation, including fault elimination in the process flow, as well as - servicing (maintenance, repair). In addition to the operator's manual and the binding accident prevention regulations applicable in the country and place of use of the machine, the generally acknowl-edged rules of technology with regard to safe and professional work practices are to be observed.

1.2 Warnings and symbols used in the operator's manual Heeding the following safety alert symbols / signal words used in the operator's manual is absolutely necessary:

The signal word CAUTION is used to call attention to a hazard which could result in death or physical injury if not avoided while carrying out particular jobs on the machine. Special care and precaution must be taken when carrying out such jobs.

ATTENTIONThe signal word ATTENTION is used to call attention to hazards which could result in damage and/or destruction of the grinding machine or its environment if special attention is not paid while carrying out particular jobs.

NOTICE The signal word NOTICE calls attention to useful tips and information for the operation of the machine.

1. Important Notes

CAUTION

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1.3 Warning labels on the grinding machine and their meanings

The following warnings and safety alert signs have been affixed to the grinding machine:

CAUTION! DANGEROUS ELECTRICAL VOLT-AGE (warning notice on the rear panel)

On being connected to the voltage supply (3x 400 V), the grinding machine becomes electrically live and touching its live parts directly could be life-threatening.

Live machine parts may be opened only by authorised technical staff.

The grinding machine must be separated from the mains connection before carrying out servicing, maintenance and repair jobs on it.

CAUTION! RISK OF INJURY FROM KNIFE (warning notice on the front panel)

Work on the grinding machine involves the sharpening of knives which could cause serious cut injuries due to their sharpness.

Wearing protective gloves is mandatory when carrying out such jobs.

Be careful when transporting knives. Use the protective devices provided by the knife manufacturer. Wear protective gloves and apron.

CAUTION! RISK OF INJURY FROM ABRASIVE PARTICLES (warning notice on the front panel)

Grinding, polishing and truing gives rise to abrasive particles which could enter the eyes.

Wearing safety glasses is mandatory when carrying out such jobs.

1. Important Notes

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1.4 Type plate and machine number

The type plate is located on the rear panel of the machine.

Example of a type plate

The machine number can be found on the type plate and on the rear left side panel (see arrow).

1.5 Figure and item numbers in the operator's manual

If the body text refers to a part in a figure, this is done by specifying the figure number and the item in brackets.

Example: (7-11/1) denotes figure number 7-11 / item 1.

The coolant volume can be regulated with the water nozzle (7-11/1).

Turning in clockwise direction = more water, Turning in anti-clockwise direction = less water.

1. Important Notes

TYPE USK 160 S Bauj. 1998Masch.-Nr. 101308 45 160 SV 230 A 3,3

KW 0,5 Hz 50 Sch. Y

Maschinenbau GmbHD-88368 Bergatreute • Germany

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Figure 7-11 Water regulation on the grinding belt

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2.1 Basic safety instructions

2.1.1 Follow the instructions in the operator's manual

The basic prerequisite for the safe handling and uninterrupted operation of this grinding machine is the knowledge of the basic safety notices and instructions.

• This operator's manual contains important notes on how to operate the grinding machine safely.

• All the persons carrying out work on the grinding machine must follow the instruc-tions in this operator's manual, in particular the safety notices.

• In addition, the accident prevention rules and regulations applicable at the place of use of the machine must also be observed.

2.1.2 Operator's duty

The operator is obliged to allow only those persons to work on the grinding machine, who

• are familiar with the basic occupational safety and accident prevention regulations and have been trained and instructed in the handling of the grinding machine,

• have read the operator's manual, particularly the “Safety” section, and have read and understood the warning notices. They have given a signed confirmation of this in writing.

It is also checked at regular intervals as to whether the worker is fulfilling his employee obligation to observe safety at work.

2.1.3 Worker's duty

All the personnel working on the grinding machine shall be obliged to

• observe the basic occupational safety and accident prevention regulations,

• read the operator's manual, particularly the “Safety” section, and the warning notices. They shall give a signed confirmation of this in writing.

2.1.4 Hazards associated with the handling of the machine

The grinding machine has been built to the latest technological standards and the acknowledged rules of technical safety. In spite of that, its use presents inherent risks which could result in bodily harm or even death of the user or third persons, or im-pairment of the grinding machine or other property.

2. Safety

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The grinding machine may be used only:

• for the intended purpose, and

• in faultless condition with regard to safety-relevant aspects.

Faults that could impair safety must be eliminated immediately.

2.1.5 Faults

If safety-relevant faults occur in the grinding machine, or if the processing behaviour indicates that such faults may have occurred, the grinding machine must be stopped immediately and until such time as the fault has been found and eliminated.

Allow only authorised technical staff to eliminate the faults.

2.2 Proper Use

The grinding machine is meant for the grinding and polishing of linear and sickle-shaped flat knives only.

Other than hand knives (e.g. butcher knives), all the knives must be clamped to suit-able grinding plates.

Before starting work on a flat knife, it must be checked whether the knife fits on the grinding plate. Only then may the knife be mounted on the grinding plate.

Any other use is considered improper use. Knecht Maschinenbau GmbH does not assume any liability for damages resulting from improper use. The user alone bears the risk in such cases.

Proper use includes the observance of all the instructions in the operator's manual.

The grinding machine is being used improperly, if, e.g.,

• flat knives are sharpened without grinding plate,

• devices are not fastened properly.

• if knives are sharpened / polished in opposite direction of the cutting edge on the grinding belt or the polishing brush.

2. Safety

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2.3 Warranty and Liability

Our “General Terms and Conditions” shall apply in most cases. These terms and conditions shall be made available to the operator latest upon signing of the contract. Warranty- and liability claims in case of personal and material damage are excluded if such damage is attributable to one or more of the following causes:

• improper use of the grinding machine,

• improper transportation, commissioning, operation and maintenance of the grinding machine,

• operating the grinding machine with defective safety devices, or improperly attached or malfunctioning safety and protective devices,

• ignoring the instructions in the operator's manual with regard to transportation, commissioning, operation, maintenance and repair of the grinding machine.

• unauthorised structural modifications of the grinding machine,

• unauthorised modification, e.g. of the drive conditions (power and speed), and

• insufficient monitoring of machine parts that are exposed to wear.

• use of unapproved spare parts and wear parts

Use only original spare parts and wear parts. If parts are purchased from external suppliers, it cannot be guaranteed that they will be constructed and manufactured to withstand the stresses and provide the level of safety required for operating the grinding machine.

2.4. Safety Instructions

2.4.1 Organisational measures

All the existent safety devices must be checked regularly.

Observe prescribed intervals for recurring maintenance jobs or as specified in the operator's manual.

2.4.2 Protective devices

Before putting the grinding machine in operation, it must be ensured that all the protective devices are properly mounted and in functional condition.

2. Safety

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Safety devices may be removed only after the machine has stopped and has been secured against accidental restarting of the grinding machine.

If sub-components are supplied, the safety devices must be correctly attached by the operator according to the instructions.

2.4.3 Informal safety measures

The operator's manual must be permanently available at the place of use of the grinding machine.

In addition to the operator's manual, the generally applicable as well as the locally relevant accident prevention regulations must also be made available and observed.

All the safety alert symbols and warning notices on the grinding machine must be complete and clearly legible.

2.4.4 Personnel selection, personnel qualification

Only trained and instructed personnel may work on the grinding machine. The minimum legal age for employment must be observed.

The responsibilities of the personnel must be clearly assigned, i.e. commissioning, operation, maintenance and repair, etc.

Personnel still in the training or instruction phase may only be allowed to work on the grinding machine under the permanent supervision of an experienced person.

2.4.5 Machine control system

Only trained and instructed personnel is allowed to switch on the machine.

2.4.6 Safety measures in normal operation

Refrain from any method of working which may pose a risk to safety.

Only operate the grinding machine if all the safety devices are installed and fully functional.

Check the grinding machine for external signs of damage and correct operation of the safety devices at least once every shift.

Report any changes (including operating behaviour) immediately to the competent department / person. Where required, shut down the grinding machine immediately and secure against restarting.

2. Safety

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Before switching on the grinding machine, ensure that no one is exposed to any risk from the start-up of the machine.

In case of malfunctions, immediately stop the machine and secure against restarting. Have the faults eliminated immediately.

2.4.7 Hazards from electrical power sources

Work on electrical systems or operating materials may only be performed by an electrician in accordance with electrical rules.

Defects, such a damaged cable, cable connections, etc., must be immediately rectified by an authorised electrician.

2.4.8 Particular danger zones

Danger of crushing, and clothes, fingers, hair, etc., getting caught in the area of the flap wheel, the grinding belt and the polishing brush.

2.4.9 Servicing (maintenance, repair), fault elimination

Repair work is to be carried out on schedule by qualified personnel.

Inform operating personnel before starting repair work. The responsible supervisor is to be named.

For all servicing jobs, the grinding machine is to be disconnected from the power supply and secured against accidental restarting. Pull out the mains plug.

Cordon off the servicing area, as far as possible.

After completion of the maintenance jobs and fault elimination, install all the safety devices and check whether they are fully functional.

2.4.10 Structural modifications of the grinding machine

Modifications, retrofitting or rebuilds of the grinding machine are not allowed without the permission of the manufacturer.

This also applies to the installation and adjustment of safety devices.

No alterations may be carried out without prior written permission from Knecht Maschinenbau GmbH.

Immediately replace machine parts which are not in perfect condition.

2. Safety

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2.4.11 Cleaning the grinding machine

Cleaning agents and materials used must be handled properly and disposed of in an environmentally friendly way.

Ensure that wear and replacement parts are disposed of in a safe and environmen-tally friendly way.

2.4.12 Oils and greases

When handling oils and greases, follow the safety instructions for the product. Observe special instructions for the food industry.

2.4.13 Site change of the grinding machine

Even when moving the machine a short distance from its site, disconnect it from all external power supply sources. Before restarting the machine, connect it properly to the voltage supply once again.

When loading or unloading, only use hoisting and load lifting equipment with sufficient load-bearing capacity.

Appoint a qualified banksman (signaller) for the lifting process.

No persons other than those entrusted with this work may be present in the loading- and depositing area.

Only lift the grinding machine correctly with hoisting gear in accordance with the operating instructions (attachment points for hoisting equipment, etc.).

Only use suitable transport vehicles with sufficient load-bearing capacity.

Attach the load securely. Use suitable attachment points.

When putting in operation again, proceed only as instructed in the operator's manual.

2. Safety

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3. Intended Purpose

3.1 Intended Purpose

The USK 160 S Universal Wet Grinding Machine is meant for the sharpening of hand knives and bowl cutter knives.

3.2 Technical Data

Height _________________________________________________ 450 mm

Width _________________________________________________ 610 mm

Depth _________________________________________________ 550 mm

Weight ___________________________________________________29 kg

Voltage supply* _______________________________________ 3x 400 V

Mains frequency* _________________________________________ 50 Hz

Power* _________________________________________________ 0.7 kW

Power consumption* _____________________________________ 0.8 kW

Current consumption* ______________________________________ 2 A

Pre-fuse ___________________________________________________ 16 A

Idling noise at the grinding belt _________________________ 80 dB (A)

Operating noise at the grinding belt ____________________ 84 dB (A)

Operating noise at the grinding disc _____________________ 86 dB (A)

*) These data may vary depending upon the electrical power supply.

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3. Intended Purpose

3.3 Functional Description

The machine is equipped with a grinding belt, a flap wheel and a wet-honing disc. The USK 160 S can be alternately equipped with a serrated edge grinding disc for cutlery knives and a polishing brush.

With a few hand movements, it is possible to mount a device (HV 161) with which cutter blades up to 200 ltr. can be sharpened at the correct angle (accessory).

The USK 160 S is available in the tabletop version and the pedestal version.

450

mm

550 mm610 mm

Figure 3-1 Dimensions in mm

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3. Intended Purpose

3.4 Assembly group description

1 splash guard2 flap wheel3 movable guard4 left protective hood5 right water nozzle6 wet honing disc7 star knob8 water bowl9 right protective hood10 wet grinding belt11 “On/Off” switch

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7

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Figure 3-2 General view of the grinding machine

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4. Transport

4.1 Means of transport

For transporting and for setting up the grinding machine, only use adequately dimensioned means of transport, e.g. lorry, forklift, hydraulic lift truck.

When using a forklift or a lift truck, move the fork under the grinding machine; bear in mind the centre of gravity of the machine.

4.2 Transport damage

If damage is detected on unloading after acceptance of the delivery, inform Knecht Maschinenbau GmbH and the freight forwarder about it immediately. If required, consult an independent expert immediately.

Remove the packaging and fastening straps. Remove the fastening straps on the grinding machine.

Dispose of the packaging in an environmentally friendly way.

4.3 Transport to another installation site

For transport to another installation site, ensure that the space requirements are fulfilled (see Section 3.2).

A reliable electrical connection must be provided at the new installation site.

Installations on the electrical system may only be performed by an authorised technician or our customer service staff.

Observe the locally applicable safety and accident prevention regulations.CAUTION

The grinding machine must be stable and firmly placed.

For transporting the machine, the locally applicable safety and accident prevention regulations must be observed.

Only transport the machine in upright position (with the machine feet facing downwards).CAUTION

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5.1 Selection of qualified personnel

5.2 Installation site

When determining the installation site, bear in mind the space requirement for installation, maintenance and repair work on the grinding machine (see Section 3.2).

5.3 Supply connections

The grinding machine is delivered ready for connection with the appropriate connecting cables.

Confirm that the machine is correctly connected to the voltage supply.

If the connection to the voltage supply is incorrect, the grinding belt, polishing brush and flap wheel can rotate in opposite direction of the prescribed direction. Incorrect direction of rotation can result in serious injuries.

For prescribed direction of rotation, see Chapter 6. Initial operation.

A mains plug is to be used for the electrical connection.

CAUTION

5.4 Settings

The various components and the electrics are adjusted by Knecht Maschinenbau GmbH before delivery.

ATTENTIONUnauthorised changes to set values are not permitted and may damage the grinding machine.

5. Installation

It is advisable to have trained Knecht personnel perform the installation work on the machine.

We assume no liability for damage caused by improper installation.CAUTION

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5.5 Installing the grinding machine

Place the grinding machine at the installation site on a level tabletop or base.

Have an authorised electrician on site install the voltage supply.

Completely install and check the safety devices before initial operation.

Have all the protective devices checked for proper functioning by authorised specialists before initial operation of the machine.

CAUTION

5. Installation

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.

Connect the power plug (CEE plug) to the power socket provided on site (3x 400V, 16A).

Turn the “On/Off” switch (6-1/1) to position I. Grinding belt, polishing brush / wet-hon-ing disc and the flap wheel / serrated edge grinding disc start rotating.

Check the direction of rotation. The direc-tion arrow (6-1/2) indicates the direction of rotation of the grinding belt and polishing brush / wet-honing disc and flap wheel / serrated edge grinding disc.

Inject measured doses of the coolant by turning the water nozzle (3-2/5).

After ensuring that the direction of rota-tion is correct, turn the switch for the grind-ing belt, polishing brush / wet-honing disc and flap wheel / serrated edge grinding disc (6-1/1) to position 0.

Figure 6-1

6. Initial operation

All the work on the machine may be performed only by authorised technical staff. The locally applicable safety and accident prevention regulations must be observed. There is a risk of hands, hair and clothes getting caught in the grinding machine while the machine is on. This can result in serious injuries.

CAUTION

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7.1 General principles of grinding technology

Material must be removed in order to sharpen a blunt blade. A sharp blade is obtained only if the blade is sharpened right up to the front of the cutting edge.

The only way it is possible to determine whether the cutting edge has actually been sharpened is to check for burr. If there is burr on the cutting edge, the grinding process on the cutting edge can be ended. A knife with burr on the cutting edge is, however, not yet really sharp. The blade achieves its final sharpness only after the burr has been removed.

The burr is removed with the polishing brush.

However, not only sharp cutting edges, but also long service lives are required.

The service life of a blade is mainly influenced by the cutting edge angle. The smaller the cutting edge angle, the higher is the theoretical service life. In practice, however, the cutting edge breaks off and is therefore no longer sharp when the cutting edge angle is too small.

The cutting edge angles must therefore lie between 15° and 35°. If the cutting edge angles are less than 15°, the blade becomes so unstable that it breaks at the slightest resistance. If the cutting edge angle is greater than 35°, the blade is extremely stable, but service life will not be as long.

One more criterion for judging the properties of a cutting edge is the cutting edge profile. There are three different ground profiles:

Tapered grinding Convex grinding Concave grinding

Convex ground profiles can mostly be found on cutter blades and hand knives. Tapered and concave ground profiles are predominantly found on circular knives and blades.

In general: Adhering to the profile and the cutting edge angle specified by the manufacturer is required.

7. Operation

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7.2 Grinding of cutter blades on the grinding belt

Swivel the belt grinding unit (7-1/1) to working position by pushing it onto the pins (7-1/3) and clamping it tight with the clamping lever (7-1/2).

For setting the desired grinding angle, insert the matching spacer disc (7-2/1) on the locating pin (7-2/2).

Spacer discs for 25° and 27° are located sideways on the unit.

7. Operation

For all work on/with the grinding machine, the locally applicable safety and accident prevention regulations as well as instructions in the “Safety” and “Important Notes” section of the operator's manual must be observed

CAUTION

Figure 7-1 Swivel belt grinding unit to working position

Figure 7-2 Spacer disc for setting the grind-ing angle

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The grinding plate (7-3/1) is placed on top of the spacer disc (7-2/1).

The driving pin (7-3/2) of the locating bolt must engage in the driving pin hole (7-3/3) of the grinding plate (7-3/1).

Using the locking lever (7-4/1), the grind-ing plate (7-4/2) is fixed to the cutter blade grinding unit (7-4/3).

For that, turn the locking lever (7-4/1) on the locating pin (7-4/4) in clockwise direc-tion.

For clamping the knife (7-5/3), swivel back the grinding plate (7-5/2) and locking lever (7-5/1).

The knife (7-5/3) is clamped onto the grind-ing plate (7-5/2) by inserting the knife bolts (7-5/6) in the holes of the grinding plate (7-5/2) and locking the knife by turning the cock plug (7-5/5) to the left.

This can result in serious cut injuries.

Wear protective gloves.CAUTION

After clamping the knife, swivel the lock-ing lever, grinding plate and knife forward again.

7. Operation

Figure 7-3 Mounting the grinding plate

Figure 7-4 Fix grinding plate with locking lever

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Figure 7-5 Clamping the cutter knife onto the grinding plate

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Turn the hand wheel (7-6/3) in clockwise direction until the lock lever (7-6/1) engages in the first locking position of the locking disc (7-6/2).

To come to the first locking position, press with the thumb on the lock lever (7-6/1); the remaining four fingers are used to turn the hand wheel (7-6/3) in clockwise direc-tion.

Make the locking disc (7-7/1) inactive by turning the star knob (7-7/2) in counter-clockwise direction by 1/4th of a rotation.

Turn the hand wheel (7-8/3) in counter-clockwise direction until the cutter blade (7-8/2) touches the grinding belt (7-8/1).

7. Operation

Figure 7-7 Making the locking position inactive

Figure 7-8 Cutter blade sharpening unit

Figure 7-6 Turning the hand wheel to first locking position

NOTICE

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Turn the hand wheel (7-9/3) to the second locking position of the locking disc (7-9/2).

To come to the second locking position, press with the thumb on the lock lever (7-9/1); the remaining four fingers are used to turn the hand wheel (7-9/3) in counter-clockwise direction.

Before switching on the grinding machine, swivel back the locking lever and knife same as when clamping the knife (Figure 7-5).

Turn the switch for grinding belt, polishing brush / wet-honing disc (7-10/1) to position I.

There is a risk of hands, hair and clothes getting caught in the grinding machine while the machine is on.

This can result in serious injuries.

CAUTION

7. Operation

NOTICE

Figure 7-9 Turning the hand wheel to sec-ond locking position

Figure 7-10 Mounting the grinding plate

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The coolant volume can be regulated with the water nozzle (7-11/1).

Turning in clockwise direction = more water.Turning in counter-clockwise direction = less water.

Push the locking lever forward with the right hand and rotate the knife along the cutting edge with the left hand until burr has been formed over the entire length of the cutting edge.

Knives with pronounced cutting edges are ground only from edge to edge; then one moves on to the next field and grinds again from edge to edge, etc.

If burr has been formed all over the blade, the grinding unit is moved to the next locking position with the hand wheel ‹ the knife moves in the direction of the belt. Execute five strokes in this direction (one stroke = grinding from knife tip to knife base and back again). Then move to the next locking position and execute five strokes again, and so on, until the entire curvature of the knife is ground. Finally, move back to locking position 2 and clamp the next knife.

NOTICE The lock lever need not be pressed when moving back to locking position 2. All the locking positions up to locking position 2 can be skipped by turning the hand wheel.

7. Operation

Figure 7-11 Water regulation on the grind-ing belt

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Subsequently, polish the cutter blade (7-12/1) on the wet-honing disc (7-12/2) as described in Chapter 7.5 or on the polishing brush as described in Chapter 7.4.



CAUTION

Switch off the grinding machine after com-pleting the grinding process.

To do this, turn the “On/Off” switch (7-13/1) to position 0

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7. Operation

This can result in serious cut injuries.

Wear protective gloves.

CAUTION

Figure 7-12 Cutter blade polishing unit

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Figure 7-13 Switching off the grinding machine

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7.3 Grinding of hand knives on the grinding belt

Turn the “On/Off” switch (7-14/1) to position I.

Lay the knife flat on the grinding belt.

The cutting edge should not have a trans-verse course relative to the grinding belt, but a diagonal course. Press the knife onto the grinding belt with the free hand.

The greater the pressure, the more convex the ground profile. Alternately draw both sides of the knife over the grinding belt, until burr has been formed over the entire length of the cutting edge.

Subsequently, polish the hand knife on the polishing brush as described in Chapter 7.4 or on the wet-honing disc as described in Chapter 7.5.

Switch off the grinding machine after completing the grinding process. For that, turn the “On/Off” switch (7-14/1) to position 0.

7. Operation



CAUTION

Never hold the blade against the direction of travel of the grinding belt.

This can result in serious injuries.CAUTION

Figure 7-14 Switching on the grinding machine

Figure 7-15 Sharpening of hand knives

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7.4 Polishing and deburring with the polishing brush

The burr on the knife is removed with the polishing brush; this gives the knife its final sharpness.


Hold the polishing paste (7-17/1) briefly against the moving polishing brush (7-17/2).

7. Operation



CAUTION

Polishing gives rise to abrasive particles that could enter the eyes.

Wear protective glasses.Wear mask.

CAUTION

Never hold the blade against the direction of travel of the grinding belt.

This can result in serious injuries.CAUTION


Figure 7-17 Applying the polishing paste

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For polishing / deburring, move the knife (7-18/1) at a steep angle (approx. 20° - 25°) along the polishing brush (7-18/2). Polish the topside and underside of the brush alternately until the burr is removed.

7. Operation

For all work on the grinding machine, the locally applicable safety and accident prevention regulations as well as instructions in the “Safety” and “Important Notes” section of the operator's manual must be observed.

CAUTION


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7.5 Deburring with the wet-honing disc

Deburring can be done on the water-cooled wet-honing disc as well.

Exactly suited circumferential speed and optimally adjusted hardness of the wet- honing disc result in a smooth blade which remains sharp for a long time.


For deburring, move the knife (7-20/1) at a flat angle (approx. 15°) and with lots of pressure along the wet-honing disc (7-20/2).

As soon as the burr is removed, finish the sharpening at a slightly steeper angle (approx. 17°) and without pressure.

7. Operation



CAUTION



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7.6 Sharpening of cutlery knives on the water-cooled serrated edge grinding disc

The water-cooled serrated edge grind-ing disc is mounted for the sharpening of cutlery knives, and the polishing brush is mounted for dry polishing.

The nut (7-21/2) of the grinding spindle is loosened with a flat wrench (SW 22) (7-21/1).

Loosen = turn to the left (direction of rota-tion). Tighten = turn to the right (against the direction of rotation)

If the grinding spindle rotates jointly with the nut, lock it with a flat wrench (SW 10) at the end of the shaft.

The assembly of the water-cooled serrated edge grinding disc is performed in reverse sequence.


Check the direction of rotation!

7. Operation

NOTICE



CAUTION

Figure 7-21 Loosening the flap wheel


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To remove the old serrated edge, first pre-grind the cutlery knife (7-23/1) on a finely granulated grinding belt (grain 240).

Hold the cutlery knife (7-24/1) at a steep angle (approx. 45°) against the serrated edge grinding disc (7-24/2), and turn slowly up to the tip of the knife.

Subsequently, polish the cutlery knife (7-25/1) on the polishing brush (7-25/2) as described in Chapter 7.4 or on the wet- honing disc as described in Chapter 7.5.

Switch off the grinding machine after completing the grinding process. For that, turn the “On/Off” switch (7-22/1) to position 0.

7. Operation

Polishing gives rise to abra-sive particles that could enter the eyes.

Wear safety glasses.Wear mask.

CAUTION

Figure 7-23 Pre-grinding of cutlery knives

Figure 7-24 Grinding the serrations

Figure 7-25 Polishing the cutlery knives

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7.7 Replacing the grinding belt

Loosen and remove the star knobs (7-26/1) by turning them in counter-clockwise direc-tion; remove the belt protecting hood (7-26/2). Turn the belt unloading lever (7-27/1) in the direction of the arrow up to limit stop.

Remove the used grinding belt and place a new belt over the contact disc and guide roller. Turn the belt unloading lever (7-27/1) against the direction of the arrow up to limit stop. Turn the grinding belt one full circle by hand and verify that it is not scuffed anywhere.

Mount the belt protecting hood.

Heed the movement direction arrows on the inside of the grinding belt.


7. Operation

Risk of injury.

Never switch on the machine without the protective hood on.CAUTION

ATTENTION

CAUTION

Figure 7-26 Belt protecting hood with belt unloading unit

Figure 7-27 Replacing the wet-grinding belt

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7.8 Belt control

If the grinding belt is not running exactly on the contact disc, it can be aligned with the belt control knob (7-28/1).

Turning the belt control knob in counter-clockwise direction makes the grinding belt run to the left. Turning in clockwise direc-tion makes the belt run to the right.

7. Operation

Figure 7-28 Belt control

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7.9 Coolant unit

The coolant is supplied in USK 160 S through continuous circulation around the grinding wheel using an immersion pump (7-29/1).

When the machine is at standstill, the grinding materials are not immersed in water. The grinding debris is collected in the water bowl.

The immersion pump is driven by the motor via a circular belt.

7.9.1 Belt cooling

The pump transports the coolant to the grinding belt via the water nozzle.

The dosing is done by tilting the water nozzle.

This does not change the flow rate, but the angle of impact on the grinding belt.

The pin (7-30/1) on the water nozzle (7-30/2) indicates the angle at which the coolant impacts the grinding belt.

The standard setting is vertical, facing downwards.

Turning in clockwise direction = more cool-ant. Turning in counter-clockwise direction = less coolant.

For cleaning, the water nozzle is simply pulled out after removing the protective hood ...

7. Operation

Figure 7-29 Immersion pump

Figure 7-30 Adjusting the water nozzle

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7.9.2 Cooling of the flap wheel or the water-cooled serrated edge grinding disc

In contrast to the belt side, on which maximum possible coolant is to be supplied to the grinding belt, finer doses have to be applied to the flap wheel or the water-cooled serrated edge grinding disc.

7.9.3 Closing the water nozzle during dry polishing

The water feed has to be stopped when using a finned brush for polishing.

For that, the rubber (7-31/2) located on the water nozzle (7-31/1) must be pushed over the hole (7-31/3) in the water nozzle.

7. Operation

Figure 7-31 Closing the water nozzle

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8.1 Grinding materials

The following grinding materials are approved for use in USK 160 S:

Name Type Grain Dimensions Remarks

Wet grinding belt CK721X 60 960x50

CK721X 80 960x50

CK721X 100 960x50

CK721X 120 960x50 Assembled on delivery

CK721X 240 960x50

CK742J 180 960X50 Compact grain

Finned brush Sisal d.150x50xd.15

Wet honing disc FW 600 d.150x50xd.100 Assembled on delivery

Flap wheel 100 d.150x50xd.15

280 d.150x50xd.15 Assembled on delivery

Water-cooled serrated edge grinding disc

pitch 1.25 d.150x65xd.15 water-proof

pitch 1.5 d.150x65xd.15 water-proof

pitch 2 d.150x65xd.15 water-proof

pitch 3 d.150x65xd.15 water-proof

8. Maintenance & Care



CAUTION

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8.2 Cleaning

Clean the machine each time after sharpening to prevent the swarf from drying, hence making it harder to remove.

After cleaning, lightly grease the machine with non-corrosive oil (also refer to lubrication schedule). The coolant is to be replaced at weekly intervals.

8.3 Lubrication

Lubrication schedule and lubricant table

Lubrication jobs Interval OEST SHELL ESSO DEA

Lubricating the threads of star knobs and clamping levers

every 4 weeks

GOC 180 Alvania R2 Beacon EP2 Dolon E2

Oiling the machine parts after cleaning

after each grinding operation

ParaffinumPerliqium

Ondina 1727 Marcol80 Merkur WeißölPharma 40

Coolant addition every 2 weeks

Colometa Dromus B Kutwell S 72 Targon AL

8. Maintenance & Care

Knecht Maschinenbau GmbH

Witschwender Strasse 26 ■ 88368 Bergatreute ■ Germany

Phone +49-7527-928-0 ■ Fax +49-7527-928-32

[email protected] ■ www.knecht.eu

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