User guide

Page 31
ServoTube 25/38 Module User Guide
Chapter 3
Maintenance
Replacement
Slide the newly assembled forcer on to the bearing rail taking care to keep the forcer square to the bearing •
rail so that balls are not lost from the re-circulating bearing carriage(s). If balls do fall out they can be re-
inserted into the carriages. Push the ball bearings using a small screwdriver into the end of the re-circulating
path at the plastic end plates on the carriage.
On the SB25 or XB38: • slide the thrust rod support on to the backing bar and tighten the four M4 xngs to a
torque of 4 Nm.
On the SM25 or XM38:• ret the thrust rod support to the end of the backing bar and secure using the three
M6 xings tightened to a torque of 20 Nm.
Replace the thrust rod as described on page 27.•
Replace the cable assembly as described on page 22.•
Replace the bellows (if tted) as described on page 25. •
ENCODER READHEAD (Optional item)
Before commencing any work, it is important to note that the encoder may require alignment to achieve optimum
performance after replacement.
Removal
If applicable, remove the bellows as described on page 24. •
Remove the thrust rod as described on page 26.•
Remove the forcer as described on page 28.•
On the underside of the forcer remove the M3 countersunk xing and clamp holding the encoder cable to the •
forcer body. Refer to Figure 3.20 for location of the encoder readhead bracket and encoder readhead.
Remove the encoder (cable) clamp.•
Undo the four M3 x 6 xings to remove the encoder bracket.•
Undo the two M3 x 10 xings to remove the encoder readhead with integral cable.•
Replacement
Ret the replacement encoder readhead to the encoder bracket using the two M3 x 10 xings and tighten to a •
torque of 0.7 Nm.
Ret the encoder bracket to the forcer using the M3 x 6 xings.•
Route the encoder cable via the clamping groove in the forcer and ret the encoder cable clamp with its •
M3 x 8 countersunk screw to secure the encoder cable to the forcer body. Tighten to a torque of 0.7 Nm.
Slide the forcer on to the bearing rail taking care to keep the forcer square to the bearing rail so that balls •
are not lost from the re-circulating bearing carriage(s). If balls do fall out they can be re-inserted into the
carriages. Push the ball bearings using a small screwdriver into the end of the re-circulating path at the plastic
end plates on the carriage.