FX-3R Maintenance Guide
2-12
2-5. Replacing the Belts
2-5-1. Replacing the Timing Belt Z
After the timing belt Z has been replaced, it is absolutely necessary to re-input the MS parameters
related to the Z-axis home position adjustment, Z-axis height, and laser. (For details of input items,
see section 2-7.)
Rev. 1.00
1) Loosen the SEMS cap bolts c (×3) shown
in the figure on the right.
2) Replace the timing belt Z.
3) Reassemble the components in the
reverse order of disassembly.
∗ Apply Loctite 242 to the Z-motor
mounting screws (3 pcs.) and tighten
them with a tightening torque of 2.3 N･m.
c SL6031692TN
SEMS cap bolt with
washer M3×16
40046522
Timing belt Z
Figure 2-5-1 Removing the Z-motor
∗ Adjust the belt tension following section 2-2-1.
2-5-2. Replacing the Timing Belt θ
After the timing belt θ has been replaced, it is absolutely necessary to re-input the MS parameters
related to the Z-axis home. (For details of input items, see section 2-7.)
1) Detach the bearing base c.
(L1 to L3: bearing base LL, L4 to L6: bearing base LR)
2) Detach the ball spline from the coupling d.
3) Pull out the spline housing downward and the spline
shaft upward.
4) Replace the timing belt θ.
5) Reassemble the components in the reverse
order of disassembly.
∗ When the bearing base L is secured, make sure that
the shaft is rotated smoothly.
∗ Adjust the belt tension following section 2-2-2.
L1 to L3: Bearing base LL c
L4 to L6: Bearing base LR c
Ball spline
Coupling d
40046521
Timing Belt T
Timing Belt θ
Figure 2-5-2 Replacing the
Timing Belt θ
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