HP 750 - Manual (Page 164)

8-46 Troubleshooting C4705-90000
25. YĆStatic Friction
The purpose of this test is to check the static friction of the carriage assembly at different
postions along the YĆaxis.
Perform the YĆstatic friction test as follows:
1 In the Service Tests submenu, scroll to 25 Y static friction" and press Enter.
SERVICE TESTS
25 Y static friction
2 The Testing Static Friction..." message is displayed on the frontĆpanel as the plotter
performs the test.
3 The Maximum PWM # / Press Enter" message is displayed on the frontĆpanel.
A typical Maximum PWM value (#) is 22.
If the Maximum PWM value is too high, then you must lubricate the slider rod.