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Gerald jumping on y-axis on faster cuts. #1055

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magman2112 opened this Issue Feb 15, 2019 · 2 comments

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magman2112 commented Feb 15, 2019

During Maker Night last night, a complex cut with some cuts halfway down the bed it was noticed that movement on the y-axis jumped by over 100mm on a fast movement between objects. This happened twice on two separate cuts. Sean also noticed a noise of the stepper motor racing, suggesting that the belts were slipping.

It appears that the belts on the y-axis are quite worn. Gerald still works, but I expect this issue to become more common as the belts deteriorate.

The belts on the y-axis have been planned to be replaced on the last laser maintenance session, but other jobs took priority on the day. I plan though to come in on Saturday to replace these belts and check a couple more of some noted issues with Gerald.

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magman2112 commented Feb 15, 2019

Forgot to add the Laser Maintenance team to this issue.

@DoESLiverpool/laser-maintenance

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magman2112 commented Feb 16, 2019

Both drive belts have now been replaced on the y-axis of Gerald with help from @Thingomy. This was not a small task, as all pulleys were thoroughly cleaned as well. Also, a large number of the mounting bolts for the gantry arm were loose, so these have all been tightened up.

There were still some issues though on the y-axis jumping on some of the larger cuts, so @Thingomy found a setting on the options for the laser software which reduced the maximum speed movements from 300mm/sec to 250mm/sec. This appears to have resolved the issue.

@magman2112 magman2112 closed this Feb 16, 2019

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