General Principles

• DO NOT use control-c to stop a script, this can leave the instrument in an unsafe state. Use kpfconfig.SCRIPTSTOP to request a stop (also available as a button in the KPF OB GUI).

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Setting SCRIPTSTOP to “Yes” will request that the running script terminate in an orderly fashion. This may take several minutes depending on when the running script reaches a sensible breakpoint. It is important to use SCRIPTSTOP to halt a script (instead of hitting ctrl-c) because cleanup actions will be performed after a SCRIPTSTOP (e.g. turning off laps to preserve their lifetime).

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The agitator can be reenabled by simply setting the keyword to “Yes”. This should only be done by WMKO staff and should only be done if the agitator is fully functional. A broken or misbehaving agitator mechanism presents a significant danger to the science fibers.

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The cal source has likely been disabled for a reason. Reenabling it should only be done by WMKO staff with knowledge of why it was disabled in the first place.

SlewCal or Simultaneous Calibration Source is Wrong

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These two sources are set from the same place and are always kept to the same value using the kpfconfig.SIMULCALSOURCE keyword.

Solution

This value should only be changed by WMKO staff. The choice of calibration source is influenced by our desire to maintain the lifetime of the various lamps and calibration sources and by the need for warmup times on certain sources. This is not something the user should adjust, contact a WMKO Staff Astronomer if you feel it is set incorrectly.

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The detector has likely been disabled for a reason. Reenabling it should only be done by WMKO staff with knowledge of why it was disabled in the first place.

Detector Fails to Trigger Without Error

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View the dome log file in the ~/dome.log and look for errors which indicate the nature of the problem.

The ~/grep_for_dome_error script will exclude many of the noisy, not useful lines in the dome.log file and help with examining the log.

Solution

If the log file indicates overcurrent on the motors is the issue. Ensure the mechanisms are clear of obstruction and reasonably well balanced (it doesn’t need to be perfect).

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2024-07-09 19:09:37,752 WARNING  Operation timed out (35.0 secs), max measured motor
current: 0.0 A.

The ~/grep_for_dome_error script will exclude many of the noisy, not useful lines in the dome.log file and help with examining the log.

Solution

Reboot the controller (raspberry pi): sudo reboot and restart the kpfsocal3 dispatcher: kpf restart kpfsocal3.