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Problem: TT CAM X Motor Failure
Manifestation:
In Shane AO motor control GUI:
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TT CAM X function fails to re-calibrate (perhaps following
a re-start of dispatcher saomot2).
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TT CAM X function flagged with either a red check mark and/or yellow warning triangle.
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Motor fails to move, ceases moving or fails to acheive commanded position.
Solution/Recovery:
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Turn the TT CAM X motor on:
user@shred > modify -s saomot ctrl1aux='MG_VXF'
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Release the TT CAM X brake:
user@shred > modify -s saomot ctrl1aux='BZF=-4'
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In Shane AO motor control GUI, via the TT CAM X detail
panel, select Re-calibrate.
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Refer to Motor Control GUI Start-up Procedure for current nominal on-axis positions.
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If unsuccessful, refer to recovery procedures
for General Motor Failure.
Intervention:
If attempts at above solution/recovery are unsuccessful.
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Visit ShaneAO. Identify Tip-Tilt camera stage (e.g. by observing during
a calibration attempt).
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Gently provide some upward pressure (support underside of moving stage)
on Tip-Tilt camera stage during a further calibration attempt.
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Execute solution/recovery above.
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Consider lubricating motor stage and/or associated limit switches.
Cause:
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Brushless motors have insufficient capability to move significant weight
of moving stage against gravity.
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Possible binding of motor stage and/or associated limit switches.
Effect:
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When shutting down the system, ensure the 24V brake power supply is
turned off before the Galils, since the break is on when there is no
power to it.
This prevents TTCamX stage from falling under gravity (thus blocking
access for subsequent dewar fills) when power is removed
(Issue 10624).
Associated Issues:
Change Log:
- 2017-10-03: Updated. Added effect of falling TTCAMX stage.
- 2017-08-05: Updated (binding/lubrication of limit switches).
- 2016-11-11: Updated (shred replaces shard).
- 2015-07-01: Updated.
- 2014-05-09: First version.
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