Maintenance; Regreasing; Replacing The Actuators - THORLABS PY004 User Manual

3.7 Maintenance

3.7.1 Regreasing

Note
Regreasing should be performed whenever the leadscrew thread appears dry or the
motor is noisy. Periodic greasing is advised in applications with a high duty cycle,
typically after 4000 cycles in pitch and/or 1800 cycles in yaw.
1) Drive both motors to extend the leadscrews to their full extent.
2) Apply a thin bead of high load, silicon free lubricant (e.g. Apiezon 100) as shown
below.
3) Drive the motor to retract the lead screw and distribute the grease.
4) Remove access grease using a lint free cloth.

3.7.2 Replacing the Actuators

Note
When replacing/changing the actuators, the tightening torque of the barrel clamps
must be more than 22 cNm and must not exceed 25 cNm
Rev F Mar 2021
Fig. 3.9 Greasing the Leadscrew
Chapter 3 Installation and Operation
Page 19