Replacing The Z-Motor - JUKI RS-1 Maintenance Manual

2-1-2 Replacing the Z-Motor

After the Z motor has been replaced, it is absolutely necessary to reacquire the MS parameters
related to the Z-axis height and laser. (For the items to be acquired, see section 2-2, Re-adjustment
after Replacing the Head.)
Replace the Z motor with the head mounted to the machine.
For the [★] parts of the work procedures below, also refer to the work contents of "2-1-1 Replacing
the Head Unit".
1) ★ Disconnect the connector of the Z-motor to be replaced (Zθ driver board) and remove the
cable fixing.
2) ★ Remove the air tubes (φ6, φ8) connected to the solenoid valve. (However, do not remove φ4 x
8.)
3) ★ Remove the cable fixing of the solenoid valve.
4) ★ Remove the air tube secured to the top of head SV bracket and the cable fixing.
5) ★ Remove the air tube (φ4) and the cable connected to the solenoid valve for the head-up
cylinder, and then detach the solenoid valve for the head-up cylinder.
∗ For the φ6 air tube, leave it connected but place it where it will not interfere with the work.
6) Remove the head SV bracket.
∗ Leave the solenoid valve cable and the φ4 air tube connected and place them on top of the
head.
∗ Disconnect the air tube (φ4) connected to the Y union, if necessary.
7) ★ Remove the cable fixing of the θ axis origin sensor amplifier (Z motor cable stay part) and
dismount the amplifier from the DIN rail.
∗ Make sure to apply no load to the fiber and place it where it will not interfere with the work.
8) Remove the Z motor cable stay.
9) Remove the T sensor bracket.
10) Loosen the setscrews (2 pcs.) of the Z-motor pulley.
11) Remove the motor mounting screws (3 pcs.). Pull out the pulley and detach the Z motor.
12) Reassemble the components in the reverse order of disassembly.
13) Adjust the belt tension according to the following <Belt tension adjustment procedure>.
14) After assembly, please get MS parameters.
Maintenance Guide
2-9