KE-750_MS - 第33页

(5) When assembling θ -axis motor pulley, mount so that the distance from the θ -axis motor flange to the θ motor pulley extremity is 24mm (Dia. 2 - 4 - 3). (6) Reassemble in reverse sequence. Adjust timing belt θ tensio…

4. -axis Motor Replacement

After replacing θ-axis motor, adjustment of timing belt θ tension is required. Since the θ positioning upon

home return is automatically the θ-axis home, no adjustment is necessary. Reentry of MS parameters is

also not required.

(1) Disconnect θ-axis motor wire bundle from head motor PCB.

(2) Loosen hex nut (1), the 4 SEMS cap screws (2) and hex head bolt (3) to loosen timing belt

tension.

(3) Remove the 4 SEMS cap screws (5) holding θ-axis motor and remove θ-axis motor. (Fig. 2-4-1).

(4) Loosen the 2 stop screws (6) holding motor pulley and remove from θ-axis motor. (Fig. 2 4-2).

θ-axis motor

SEMS cap scre

washe

SEMS cap scre

Timing belt θ

Sheeter motor pulle

Hex bolt

Hex nut

Fig. 2-4-1

Stop scre

(SM8030602TP)

θ -axis motor

θ motor pulley

Fig. 2-4-2

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(5) When assembling θ-axis motor pulley, mount so that the distance from the θ-axis motor flange to the

θ motor pulley extremity is 24mm (Dia. 2 - 4 - 3).

(6) Reassemble in reverse sequence. Adjust timing belt θ tension. (Refer to QA Table, Head, θ belt

tension.)

θ motor pulley

Fig. 2-4-3

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5. Z-axis Deceleration Sensor Replacement

Adjustment is not required after replacement of Z-axis deceleration sensor, but be sure it is ON when

Z-axis (Z slide bracket) is fully raised.

(1) Disconnect the wire bundle of the Z-axis deceleration sensor from head main PCB (at rear of head).

(2) Remove screw (1) and remove Z-axis deceleration sensor from head.

Note: Insert knob on the back of the

deceleration sensor into head bracket hole

to position.

Z-axis deceleration senso

Pot scre

(SM4860801SC)

Fig. 2-5-1

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