Tph (Thermal Print Head) Elevation Mechanism - Riso RZ9 Series Technical Manual

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CHAPTER 15: MASTER MAKING SECTION

DANKA AUSTRALIA PTY. LTD.

4. TPH (Thermal Print Head) Elevation Mechanism

When the machine is at standby or when loading the master onto the print drum after master making, the TPH

is elevated away from the write roller. The TPH is lowered against the write roller only during the master making

and master transfer operation.

The up and down movement of the TPH is made by the rotation of the eccentric pressure cam rotated by the

thermal pressure motor.

The stop position of the TPH, whether going up or down, is detected by the thermal pressure sensor and

sensor disc.

When the machine power is switched ON or when the all-reset button is pressed, the initialization movement

of the machine elevates the TPH away from the write roller.

Eccentric pressure cam

Thermal pressure sensor

TPH (Print Thermal Head)

Thermal pressure motor

Write roller

< TPH at elevated position >

< TPH at lowered position, touching against the Write roller >

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