● Check if there was any interaction of the carriage with the recoater, Build Unit vanes or any other
par
t.
● With the printer switched off, move the carriage by hand in both directions from end to end and
check if ther
e is any resistance or high friction.
● In the diagnostic mode, perform the 0086-03 “Scan Axis test” and take pictures of the results.
● In the diagnostic mode, perform the 0010-02 “Check Interlocks circuit”. Manually lock and unlock the
t
op cover and Build Unit door and check if both can be opened or not accordingly.
● In the maintenance menu, perform the “carriage cycling” and record a video of the movement with
the sound.
● After performing all the checks above and if it was possible to correct the found issues try to print
again.
● If the issue cannot be fixed, no issues are found, or the system error reappears in the next print, then
open a case with HP suppor
t. Provide details of the findings and actions taken from the above steps,
along with the images.
0087-0003-9959 Recoating unit system - Recoating unit impelling motor &
encoder ser
vo shutdown
Recoating unit impelling motor & encoder servo shutdown. Motor stalled.
0087-0003-9960 Recoating unit system - Recoating unit impelling motor &
encoder dir
ection test failed
Recoating unit impelling motor & encoder direction test failed.
Suggested steps:
● Check the position of the recoater and carriage when the system error happened and take pictures
fr
om different angles and distances.
● Check if there was any interaction of the recoater with the carriage, Build Unit vanes or any other
par
t.
● Check if eventually parts that were being printed blocked the recoater path.
● Move the recoater by hand in both directions from end to end and check if there is any resistance.
● Ensure that the powder walls are installed correctly.
0087-0003-9959 Recoating unit system - Recoating unit impelling motor & encoder servo shutdown 369
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