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Thermo Fisher Scientific

Unresolvable pole touch

Issue

Unresolvable pole touch

Environment

Titan 80-300

Resolution

These are possible resolutions for the issue:

  • Fix harness cable in position

Cause

These are possible causes for the issue:

  • Harness cable causing 2v signal disappear that cause the pole touch

Details

During Z height adjustment and after using alpha wobbler, stage suddenly moved all the way to X direction. Then stage no longer responding until rebooting TEMserver. This unresolvable pole touch can happen randomly with and without holder, it also happens in alpha, x or Y movement
It was found that harness cable can cause pole touch. By wiggling the cable 2V pole touch signal can become 0V. Finally use a cushion to fix the harness cable so the issue did not happen anymore, issue fixed.