Engineer Training Drum and Grippers TJ8300 / TJ8500 Drum and Grippers.

Engineer Training

Drum and Grippers

TJ8300 / TJ8500

Drum and Grippers

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Engineer Training

Drum and Grippers

TJ8300 / TJ8500Drum

The drum assembly is comprised of:

Main structure

Vacuum segments and tubing

Grippers assembly

Load piston

Unload piston

Drum encoder

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Engineer Training

Drum and Grippers

TJ8300 / TJ8500Drum Main Structure

The drum structure is made up of:

Drum shaft

Drum skin

Vacuum segments from composed materials (Par-beam)

Gripper middle support

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Engineer Training

Drum and Grippers

TJ8300 / TJ8500Drum Main Structure (Cont.)

Drum shaft – holds the drum on the chassis.

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Engineer Training

Drum and Grippers


Drum skin

Composed of 6 different layers of carbon and glue materials

Can be heated to up to 70ºC

Circumference accuracy of ±0.3 mm

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Engineer Training

Drum and Grippers


Drum's vacuum segments:

Total of 13 vacuum segments.

Every vacuum segment is assembled from two parts that are connected together inside the drum structure.

All the segments are assembled inside the drum’s skin.

Controlling a total of 12 levels of vacuum (1.6, 1.8, 2.0, 2.2, ……3.7m) by manual valves that are assembled on the drum's left side.

Vacuum manual valve

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Engineer Training

Drum and Grippers


Drum’s vacuum segments

Vacuum segments inside the drum’s skin

Vacuum segments

Drum’s skin

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Engineer Training

Drum and Grippers


Gripper middle support

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Engineer Training

Drum and Grippers

TJ8300 / TJ8500Vacuum Segments and Sections

Vacuum segments enable the control the vacuum areas.

Vacuum is controlled by manual valves, on the drum's left side.

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Drum and Grippers

TJ8300 / TJ8500Vacuum Segments and Sections (Cont.)

The vacuum is divided by the segments as follows:

Segment 1 controls the vacuum for 0 - 1.6 m

Segment 2 controls the vacuum for 1.6 - 1.8 m










Segment 12 controls the vacuum for 3.6 m and further

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Drum and Grippers

TJ8300 / TJ8500Vacuum Sections

Vacuum manual valve

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Drum and Grippers

TJ8300 / TJ8500Drum Gripper

Grippers are metal fingers which are assembled on the same shaft and catch the substrate during loading.

Grippers can be opened during loading by activating the load piston.

Grippers can be opened during unload by activating the unload piston.

Grippers are lifted by raising a metal cam which is located on left side of the drum.

By deactivating the load or un-load pistons, the grippers will be self lowered by the power of springs, which are assembled along the gripper shaft.

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Engineer Training

Drum and Grippers

TJ8300 / TJ8500Drum Gripper (Cont.)

Gripper shaft

Gripper fingers

Metal cam

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Engineer Training

Drum and Grippers

TJ8300 / TJ8500Load/Unload Pistons

The load and unload pistons preps are to lift the metal cam in order to open the gripper fingers, either for loading or unloading purposes.

The load and unload pistons are assembled on the drum shaft and can be accessed for service from the ink cabinet side.

The pistons can be adjusted on the drum’s shaft in order to change the load or unload angels.

The load or unload pistons are controlled from the machine’s I/O system.

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Engineer Training

Drum and Grippers

TJ8300 / TJ8500Load/Unload Pistons (Cont.)

Unload pistonLoad piston

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Engineer Training

Drum and Grippers

TJ8300 / TJ8500Load/Unload Pistons (Cont.)

Load piston

Unload piston

Metal cam

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Engineer Training

Drum and Grippers

TJ8300 / TJ8500Drum Encoder

The drum’s encoder is located on the right side of the drum (drum motor side).

The drum encoder includes the following parts:

Adaptor plate, RGS ring and scale ~125,000 pulses/mm

RGM Home signal interrupt (magnet)

RGR Optic read head

Read head holder

Encoder cover and protection

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Engineer Training

Drum and Grippers

TJ8300 / TJ8500Drum Encoder (Cont.)

Optic read head and holder

Adaptor plate, encoder ring & scale and magnet sensor for home interrupt

Encoder cover and protection

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Engineer Training

Drum and Grippers

TJ8300 / TJ8500Drum Encoder (Cont.)

The optic read head holder allows easy fine adjustments of the optic read head above the encoder scale, in order to achieve maximum accuracy and best performance from the drum movement.

Optic read head and holder

Engineer Training Drum and Grippers TJ8300 / TJ8500 Drum and Grippers.

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Transcript of Engineer Training Drum and Grippers TJ8300 / TJ8500 Drum and Grippers.