Replacing The Motor; Replacing The Z-Motor (Lnc60 Head) - JUKI KE-3010 Maintenance Manual

2-2. Replacing the Motor

2-2-1. Replacing the Z-Motor (LNC60 Head)

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 2-8.)
1) Disconnect the motor cables from the servo
amplifier board.
2) Carry out the steps 1) through 6) in section
2-1-1 to detach the head valve bracket.
3) Loosen the setscrew
4) Remove the motor mounting screws
pcs.).
Detach the Z motor by pulling out the pulley.
5) Reassemble the components in the reverse
order of disassembly.
6) Follow the steps below to adjust the belt tension.
<Belt tension adjustment procedure>
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 (design value)
• Tension meter input value
Weight: 0.9g/m
• Proper tension
∗ 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.
After the Z-axis motor has been assembled, obtain the PWB top surface height of the
MS parameter.
Maintenance Guide
of the Z-motor pulley.
Width: 8.0mm
10.5±1N
Figure 2-2-1-3 Z-motor Pulley Assembling Method
SM8030312TP
Setscrew M3 L=3
(3
Figure 2-2-1-1 Z-motor Assembly
Pull by the
force of 21.6N
(2.2kgf)
Span: 45mm
Figure 2-2-1-2 Timing Belt Z
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
2-6
Rev. 2.0
SL6031692TN
SEMS cap bolt with
washer M3×16
(Top View)
Timing belt Z
.