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VIS (SRM)
fabian.arellano - 13:22 Thursday 24 December 2020 (15685) Print this report
Comment to Top filter fishing rod polarity change. (15681)

With Hirata-san and Yano-san.

See pictures in SRM Remedying Work album.

We inspected  the connector, at the motor side, of the in-vacuum cable going from the feedthrough to the stepper motor. We found that the wire connected to pin 2 was broken. After  reattaching  wire to the pin the motor worked well. Then we exchanged the pins 1 and 6 to get the correct polarity.

Additionally, using a spare stepper motor, we  checked the health of some of the unused channels of the motor driver used in SRM GAS Filters:

  • Channel 3: works,
  • Channel 4: doesn't work,
  • Channle 5: works.

Channels 0,1 and 2 are used and are known to work. The channel assignment for F0 fishing rod changed from 3 to 2:

  • Channel 0: BF
  • Channel 1: F1
  • Channel 2: F0.

Ikeda-san's script already takes into account the channel change for F0, but Shoda-san's medm screen still had to be modified accordingly.

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