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VIS (SRM)
fabian.arellano - 21:29 Tuesday 01 December 2020 (15571) Print this report
Comment to Top Filter stepper motor limit switches installation. (15530)

With Hirata, Yano, Iguchi.

See pictures, including pictures of the notebook,  at SRM Remedying Work album.

  • We received new long M3 screws, tall M3 nuts and small M3 washers to install the support for the F0 FR limit switches.
  • Hirata-san washed them in the morning.
  • About installation:
    • The new screws are inserted from underneath the IP table, hold the cable clamps base underneath the IP and the limit switch support on the top.
    • After installation we clamped back some cables we had unclamped to have access for the screws.
  • We tested the limit switches by moving the carriage of the FR and letting the trigger plate mounted in the carriage press the swtich.
    • The plate triggers the lower switch without problems. (We didn't test the upper one).
    • However, the medm required manually updating the stepper motor information to show the switch had been pressed. This is likely related to the polarity of the motor, which we have not changed yet.
  • Following Satou-san's instructions we swapped the switches in the F0 yaw motor. The new cabling diagram can be found in this picture of the notebook.

TO DO list

  • Change the polarity of the F0 FR stepper motor. Find out and report here which pins to exchange. We'll use this information more than once.
  • Check whether we can change the speed of the motor from Ikeda-san's medm screen and increase the speed. Otherwise use Shoda-san's medm screen.
  • Test the whole range of the motor with the limit switches.
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