HP 750c Service Manual - Page 163

YĆAxis Friction, Enter, Up Arrow, Arrow, Down Arrow

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24. YĆAxis Friction The purpose of this test is to check if the dynamic friction on the YĆaxis is in the correct range. The YĆaxis friction test performs these two tests: D Life test. D Friction test. Perform the YĆaxis friction test as follows: 1 In the Service Tests submenu, scroll to 24 YĆaxis Friction" and press Enter. SERVICE TESTS 24 Y-axis friction 2 The Life Test / Friction Test" message is displayed on the frontĆpanel. 3 Press the Up Arrow to perform the life test. If you want to perform the friction test, then go to step 5. 4 The # moves = # / Stop..." message is displayed on the frontĆpanel. Press the Down Arrow button to stop the test. Check that the carriage moves along the YĆaxis without binding. 5 If you want to perform the friction test, then at step 3 press the Down Arrow. 6 The No Cut PWMs Press Enter" message is displayed on the frontĆpanel. Press Enter. If the average value (###) of No Cut PWMs is less than 100 then the test has passed. If the average value (###) of No Cut PWMs is more than 100 then the test has failed. If the test fails, try one of the following: 1 Clean the slider rod. 2 Replace the YĆaxis motor ' page 6Ć24. 3 Perform the YĆaxis encoder test ' page 8Ć47. 4 Replace the carriage ' page 6Ć34. 7 The PWM (Cut) = # / Press Enter" message is displayed on the frontĆpanel. This value (#) is for the cutter PWM and is for reference purposes only. C4705-90000 Troubleshooting 8-45

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Troubleshooting
C4705-90000
8-45
24. YĆAxis Friction
The purpose of this test is to check if the dynamic friction on the YĆaxis is in the correct
range.
The YĆaxis friction test performs these two tests:
D
Life test.
D
Friction test.
Perform the YĆaxis friction test as follows:
1
In the Service Tests submenu, scroll to ±24 YĆaxis Friction" and press
Enter
.
SERVICE TESTS
24 Y-axis friction
2
The ±Life Test / Friction Test" message is displayed on the frontĆpanel.
3
Press the
Up Arrow
to perform the life test.
If you want to perform the friction test, then go to step
5
.
4
The ±# moves = # / Stop..." message is displayed on the frontĆpanel. Press the
Down
Arrow
button to stop the test.
Check that the carriage moves along the YĆaxis without binding.
5
If you want to perform the friction test, then at step
3
press the
Down Arrow
.
6
The ±No Cut PWMs #, #, # # / Press Enter" message is displayed on the frontĆpanel.
Press
Enter
.
If the
average
value (###) of
No Cut PWMs
is
less
than
100
then the test has passed.
If the
average
value (###) of
No Cut PWMs
is
more
than
100
then the test has failed.
If the test fails, try one of the following:
1
Clean the slider rod.
2
Replace the YĆaxis motor
'
page 6Ć24.
3
Perform the YĆaxis encoder test
'
page 8Ć47.
4
Replace the carriage
'
page 6Ć34.
7
The ±PWM (Cut) = # / Press Enter" message is displayed on the frontĆpanel.
This value (#) is for the cutter PWM and is for reference purposes only.