FX-3R Maintenance Guide
2-7
2-2. Replacing the Motor
2-2-1. Replacing the Z-Motor
After the Z motor 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.)
1) Disconnect the Z-motor
cables from the power
connector base and
Z-encoder relay board.
(See also steps 2), 4), 5),
and 7) stated in section
2-1.)
Figure 2-2-1-1 Z-motor Assembly (Top View)
c
SM8030312TP
Set screw M3 L=3
d
SL6031692TN
SEMS cap bolt with
washer M3
×
16
40044534
Servomotor 30W
(Z-axis)
2) Loosen the hollow set screws
c
(
×
2) of the Z-motor pulley.
3) Remove the SEMS cap bolts
d
(
×
3) mounting the motor. Detach the Z-motor by pulling out the
pulley.
4) Reassemble the components in the reverse order of disassembly, and adjust the belt tension
as the last step.
<Belt tension adjustment procedure>
Timing belt Z
Pull by the
force of 21.6N
(2.2kgf)
Figure 2-2-1-2 Timing Belt Z
c
Put the screw in the tap of the Z-motor and lock the
mounting screw with the screw pulled in the direction
indicated by an arrow with a force of 21.6 N (2.2 kgf)
using a tension gauge.
Tension meter set value (For check)
•
Tension meter input value
Weight: 0.9g/m Width: 8.0mm Span: 45mm
•
Specification value: 10.5±1N
∗
Apply Loctite 242 to the Z-motor mounting screws
(3 pcs.) and tighten them with a tightening torque of
2.3 N
･
m.
∗
When tightening the setscrew of the Z-motor pulley, make sure to align the orientation of the
flat part of the Z-motor shaft and the setscrew of the pulley. Tighten the setscrew with a torque
of 0.5 N
･
m.
When the Z-motor pulley is secured at a position where
the marking on the shaft is located at 2-o’clock position
as shown in the figure on the left or the shaft D cut
surface is located at a position as shown in the figure
with the Z-axis raised to its uppermost position, this
becomes the conditions for item
d
.
Figure 2-2-1-3 Z-motor Pulley Assembling Method
Rev. 1.00