Monday, July 31. Bruce investigated and could not reproduce the problems that we experienced on Friday evening. Two plausible explanations:
1) it is possible that a connector on the BSU azimuth motor became loose — impairing just one phase of the quadrature pulse line. It is possible that I bumped the connector earlier in the week while installing a wire to power a small fan in the shrouding of the Az motor. I may have pressed them back on Saturday when removing the shrouding, re-establishing a good connection. Anyway, the angles are fine today and we are relieved that we don't have to replace the Az motor.
2) It appears that if one stops the LabVIEW program that controls REAL, one must fully exit the LabVIEW application and restart it before running the program again. Robert and I did not exit LabVIEW Friday night and this might have led the software to a state of befuddlement.
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Unknown User (shane)
Monday, July 31. Bruce investigated and could not reproduce the problems that we experienced on Friday evening. Two plausible explanations:
1) it is possible that a connector on the BSU azimuth motor became loose — impairing just one phase of the quadrature pulse line. It is possible that I bumped the connector earlier in the week while installing a wire to power a small fan in the shrouding of the Az motor. I may have pressed them back on Saturday when removing the shrouding, re-establishing a good connection. Anyway, the angles are fine today and we are relieved that we don't have to replace the Az motor.
2) It appears that if one stops the LabVIEW program that controls REAL, one must fully exit the LabVIEW application and restart it before running the program again. Robert and I did not exit LabVIEW Friday night and this might have led the software to a state of befuddlement.