User guide
ServoTube 25/38 Module User Guide
Chapter 3
Maintenance
Page 32
Alignment
The encoder may need aligning. To check:
Connect the encoder to the control system and apply power to the encoder only. •
Move the forcer along the entire length of the module and check that the LED indicator on the back of the •
readhead lights up green. It will light up red as it passes over the reference mark. If this does not happen,
alignment is necessary.
Remove the forcer by sliding it off 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 underside of the forcer, loosen the four M3 x 6 xings securing encoder bracket to the forcer body. •
Note. The xings should be loosened just enough to allow movement of the encoder bracket.
Slide the forcer onto 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). Should balls be lost they can be re-inserted into the
carriages by pushing them with a small screwdriver into the end of the re-circulating path by the plastic end
plates on the carriage.
Connect the encoder to the control system and apply power to the encoder only. Using a thin piece of rigid •
plastic (100mm x 20mm x 1mm), adjust the encoder readhead by sliding the plastic between the backing bar
and forcer. Push the readhead until the LED on the back of the readhead lights up green.
Move the forcer along the entire length of the module and check that the LED indicator on the back of the •
readhead lights up green. It will light up red as it passes over the reference mark.
Slide the forcer onto 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). Should balls be lost they can be re-inserted into the
carriages by pushing them with a small screwdriver into the end of the re-circulating path by the plastic end
plates on the carriage.
On the underside of the forcer, tighten the four M3 x 6 xings that secure the encoder bracket to the forcer •
body and tighten each to a torque of 0.7 Nm.
Ret the forcer, thrust rod and bellows as previously described.•
BEARING REPLACEMENT
Should excessive play be detected in the bearing system the bearing will need replacing. It is recommended that
all bearing carriages and the bearing rail are replaced at the same time.
Due to the complex nature of the process and specialist equipment required, please contact your supplier regarding
replacement.