Wt4603 unit6(wk7) machines_exam

WT4603 Wood Processing Safety & Practice

Lecture Unit 6 (Week 7 Continued)

Practical Machine Exam 2010 Lecturer: Mr. Joseph Lyster [email protected] Notes prepared by: Mr. Donal Canty, Mr. Des Kelly and Mr. Joseph Lyster Notes available on www.slideshare.net/WT4603

mailto:[email protected]

http://www.slideshare.net/WT4603

Department of Manufacturing & Operations Engineering

WT4603

Cutting List

No. Description Length Width Thickness

A 1 NA 630 44 20

B 2 NA 300 38 18

C 1 NA 310 38 18

D 2 NA 150 38 18

Machines Involved:Planer / Thickenesser / Rip Saw

• Process the following cutting list from the stock provided.• Note: Stock size is 650mm x 70mm x 50mm Rough Sawn material• All dimensions are in millimetres• Use the surface planning machine, thickenessing machine and rip saw

to process the cutting list.• Important points to note:

• Surface Planer: Know how to safely and correctly check the fence for square in relation to the in-feed table, set the bridge guard and guides for planing face side and face edge and the correct and safe hand positions when planning.

• Thickness Planer: Know the correct starting procedure for this machine and the appropriate depth of cut to take in each pass through the machine.

• Rip Saw: Know how to set both the SEDGWICK and JET rip saws for cross cut and rip operations. You must also raise and lower the blade/guard on the JET saw in relation to the material height as it is fed into the saw blade.

Practical Machine Exam Outline:


WT4603

Planer / Thicknesser / Rip saw

Name

I.D. No. Date: Score

0 1 2 3 4 5 General 1 Selection & use of appropriate PPE 0 10 Planer 2 Isolate machine prior to setting fences 0 10 3 Accurate setting of fence to 90° to the infeed table 0 4 Correct setting of bridge guard and blade exposure 0 10 5 Correct orientation of material 0 6 Correct setting of bridge guard lead in for planing face side & edge 0 7 Correct and safe procedure when surfacing material (Hand positions) 0 10 Thickeness Planer

8

Correct and safe procedure when thicknessing material (Feed & Depth) 0

Rip Saw

Sedgwick Saw Jet Saw

9 Correct and safe setting of safety guards 0

10 Correct setting of rip fence for ripping material 0

11 Safe procedure for ripping (Hand positions & use of push sticks) 0

12 Correct setting of rip fence for cross-cutting 0 10

13 Correct and safe procedure for cross-cutting 0

14 Safe removal of waste during machining 0

15 Return Machine to safe settings 0

Overall

Minimum score to pass is 85

Note 1,2,4,7& 12 are critical fail points.

If you score '0' in any element you will automatically fail the test

Comments:

Confidence

Pass Fail

Marking Scheme:


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Explanation:

1. A score of 85/100 is required to pass the practical machine exam2. Critical Fail: There are 5 critical fail elements within the marking scheme as follows:

i. Selection and use of appropriate PPEii. Isolate machine prior to setting fencesiii. Correct setting of blade guard and blade exposureiv. Correct and safe procedure when surfacing material (Hand Positions)v. Correct setting of rip fence for crosscutting

3. Should you fail to demonstrate any of the outlined critical fail elements then your exam will be terminated and you will have failed.

4. Students who score below 85/100 marks or produce a critical fail will be required to repeat the exam at the end of the semester (Week 12/13)


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General:0 1 2 3 4 5

General

1 Selection & use of appropriate PPE 0 10

1. PPE Required:• Lab Coat• Safety Glasses/Goggles

• Additional non-PPE:• Measuring Tape• Pencil• Process Sheet• Cutting List


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Planer: Planer 0 1 2 3 4 5 2 Isolate machine prior to setting fences 0 10 3 Accurate setting of fence to 90° to the infeed table 0 4 Correct setting of bridge guard and blade exposure 0 10 5 Correct orientation of material 0 6 Correct setting of bridge guard lead in for planing face side & edge 0

7Correct and safe procedure when surfacing material (Hand positions)

0 10

2. Isolate Machine prior to setting fences:• Visible demonstration of student ability to locate machine isolator and switch to off

position. • If the isolator is already in the off position then you should demonstrate this and proceed

with task3. Accurate setting of fence to 90˚ to the infeed table• Demonstrate the use of the square4. Correct setting of bridge guard and blade exposure• Adjust depth of fence in relation to the width of the timber + 10mm• Adjust blade guard to appropriate position• Demonstrate adjustment of the bridge guard to the appropriate position for face side and

face edge


WT4603

5. Correct orientation of material• Demonstrate that plank should be fed along its length from the infeed position• Demonstrate processing of face side first6. Correct setting of bridge/blade guard lead in for planing face side and face edge• Correct setting of bridge guard handle for face side and face edge7. Correct and safe procedure when surfacing material (hand positions)• Hand Movement• Body position• Feed rate


WT4603

Thicknesser Planer:Thickenesser Planer 0 1 2 3 4 5

8 Correct and safe procedure when thicknessing material (Feed & Depth) 0

8. Correct and safe procedure when thicknessing material• Demonstrate machine set up• Setting appropriate depth• Correct feed of material


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Rip Saw: Rip Saw Sedgwick Saw Jet Saw 0 1 2 3 4 5 9 Correct and safe setting of safety guards 0 10 Correct setting of rip fence for ripping material 0

11

Safe procedure for ripping (Hand positions & use of push sticks)

0

12 Correct setting of rip fence for cross-cutting 0 10 13 Correct and safe procedure for cross-cutting 0 14 Safe removal of waste during machining 0 15 Return Machine to safe settings 0

9. Correct and safe setting of safety guards• Demonstrate guard movement and ensure correct positioning processing material10. Correct setting of rip fence for ripping material• Demonstrate position of fence beyond saw blade• Demonstrate appropriate adjustment and lock of fence position• Demonstrate setting of rip to be made11. Safe procedure for ripping (hand positions and use of push sticks)• Demonstrate hand position relative to material• Demonstrate that hands never enter the machine table are when ripping• Demonstrate appropriate use of push sticks (positions)• Demonstrate appropriate feed and follow through of material


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12. Correct setting of rip fence/dog fence for cross cut• Demonstrate guard movement and ensure correct positioning processing material13. Correct and safe procedure for cross cutting• Demonstrate position of fence before saw blade • Demonstrate appropriate adjustment and locking of fence position• Demonstrate measurement setting on cross cut fence14. Safe removal of waste during machining• Demonstrate hand position relative to material• Demonstrate appropriate feed and follow through of material• Demonstrate appropriate use of push sticks (positions) to clear waste15. Return machine to safe settings


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Cutting List:

Rail 1Rail 2Rail 3Rail 3


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2038

18

4450

70

1

2

3


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Processing Procedure:Material Given: 650 x 70 x 501. Inspect material2. Select appropriate face side/ face edge (preliminary marking)3. Surface plane face side and face edge4. Thickness (P.A.R) material to 66 x 445. Rail 1 Rip 1: 22mm6. Rail 2/3 Rip 2: 20mm (2 rails produced from one rip)7. Rail 1 Thickness 1: 20mm8. Rail 2/3 Thickness 2: 18mm x 29. Rail 1 Cross cut A: 630mm x 110. Rail 2 Cross cut B: 300mm x 211. Rail 3 Cross cut D: 150mm x 212. Rail 3 Cross cut C: 310mm x 1 1

2

3


WT4603

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21-10-2010

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Wt4603 unit6(wk7) machines_exam

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