Replacing The Θ-Motor - JUKI KE-3010 Maintenance Manual

2-2-2. Replacing the θ-Motor
After the θ-motor has been replaced, it is absolutely necessary to re-input the MS parameters
related to the axis home. (For details of input items, see section 2-8.)
1) Disconnect the motor cables from the servo amplifier board.
Carry out the steps 1) through 6) in section 2-1-1 to detach the
head valve bracket.
2) Loosen the setscrews
3) Remove the motor mounting screws
and pull out the pulley to detach it.
4) Remove the flat head screws
5) Reassemble the components in the
reverse order of disassembly.
∗ Apply Loctite 242 to the flat head
screws and tighten them with a
tightening torque of 0.14 N⋅m.
6) Follow the steps below to adjust the belt tension.
<Belt tension adjustment procedure>
Make a ring using a tie-up band or belt at the top end
of the T pulley of the θ-motor. Hang the bar tension
on this ring. With the bar tension kept pulled with a
force of 12.7N (1.3kgf), secure the T pulley using the
mounting screws.
Tension meter set value (design value)
• Tension meter input value
Weight: 0.9g/m
• Specification value:
∗ Apply Loctite 242 to the θ-motor mounting screws (2
pcs.) and tighten them with a tightening torque of 2.3
N⋅m.
∗ When tightening the setscrew of the T pulley, make
sure to align the orientation of the flat part of the
θ-motor shaft and the setscrew of the pulley. Tighten
the setscrew with a torque of 0.5 N⋅m.
Maintenance Guide
(hollow setscrews (×2)) of the T pulley.
(×2) and detach the TM flange.
Assemble so that the clearance
between the T pulley and TM nut
plate is 0.3 mm.
Width: 4.0mm Span: 38.2mm
4.5 to 12.5N
(SEMS cap bolts (×2))
SL6030842TN
SEMS cap bolt with
washer M3×8
SM1020501SC
Flat head screws
M2 L=5
SM8030312TP
Setscrew M3 L=3
Figure 2-2-2-1
Pull by the
force of 12.7N
(1.3kgf)
Figure 2-2-2-2
2-7
Rev. 2.0
40044533
Servomotor 10W
(θ-axis)
Replacing
the θ-motor
Timing belt T
Adjustment of
the θ-motor Belt
Tension