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DoESLiverpool / somebody-should

A place to document practices on the wiki and collect issues/suggestions/to-do items for the physical space at DoES Liverpool
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Gerald Stopped Cutting Mid Job and LCD Screen went blank. #1542

Closed Draughtworx closed 3 years ago

Draughtworx commented 3 years ago

Whilst in the middle of a small cutting job last night Gerald just stopped and the LCD screen turned blank. I restarted a couple of times. There is no response to the screen, the rise and lower bed buttons make a small action but don't work to rise or lower the bed. I'm without clue as to why.

Does anybody have any suggestions?

johnmckerrell commented 3 years ago

@DoESLiverpool/laser-maintenance any ideas?

JackiePease commented 3 years ago

IMG_20210114_092631 When I opened the side panel, the red light on the small power supply? In front was intermittently switching on and off in a random way. By the time I got my camera it was on constant. The panel is still not working. If anyone has got anything I can try please get in touch.

JackiePease commented 3 years ago

![Uploading IMG_20210114_092619.jpg…]()

magman2112 commented 3 years ago

This is possibly a failed power supply or something else faulty that is pulling the power supply down. Unfortunately, there are 2 power supplies if I remember correctly, one for the controller and one for the stepper drivers, so we don’t know which one is playing up, though I suspect the controller PSU (which may also explain some of the other issues we have had with Gerald lately)

If it is a faulty power supply, we will likely need to order a replacement, but we might be able to make a workaround for the short term.

I will try to get across to DoES either later this afternoon or this evening to do some diagnostics.

JackiePease commented 3 years ago

It seems to be the smaller one at the front

From: Mike Gorman notifications@github.com Sent: 14 January 2021 10:47 To: DoESLiverpool/somebody-should somebody-should@noreply.github.com Cc: Jackie Pease jackiepease@hotmail.com; Team mention team_mention@noreply.github.com Subject: Re: [DoESLiverpool/somebody-should] Gerald Stopped Cutting Mid Job and LCD Screen went blank. (#1542)

This is possibly a failed power supply or something else faulty that is pulling the power supply down. Unfortunately, there are 2 power supplies if I remember correctly, one for the controller and one for the stepper drivers, so we don’t know which one is playing up, though I suspect the controller PSU (which may also explain some of the other issues we have had with Gerald lately)

If it is a faulty power supply, we will likely need to order a replacement, but we might be able to make a workaround for the short term.

I will try to get across to DoES either later this afternoon or this evening to do some diagnostics.

— You are receiving this because you are on a team that was mentioned. Reply to this email directly, view it on GitHubhttps://github.com/DoESLiverpool/somebody-should/issues/1542#issuecomment-760115539, or unsubscribehttps://github.com/notifications/unsubscribe-auth/ADBVRUBMQVD476GMKRWH4O3SZ3DSZANCNFSM4WB3TRWQ.

magman2112 commented 3 years ago

After a fair amount of diagnosis, @Sean-anotherone and I found that there was a short in one of the limit switches that pulled the power rail down via the controller.

as the limit switches aren’t working anyway at the moment, we simply left this unplugged till we do the major overhaul on Gerald.

As part of our diagnostics, we tried the spare controller that we have in the laser spares cupboard. This was found to work well and in fact the main board is now installed in Gerald along with the original controller card.

For future reference, the smaller power supply provides 24V to the controller card, which is then converted to 5V via a DC/DC converter module on the controller card. The larger power supply powers the stepper drivers.

We then checked the alignment, which was good, but Sean also found that the air assist tubing at one point was intruding in the laser path. A quick addition of a tie wrap and this issue was resolved and Gerald was back to cutting 3mm ply at 18mm/70% power.

johnmckerrell commented 3 years ago

Well done! Thanks for your efforts.

-- Sent from my mobile phone hence brevity and errors

On 14 Jan 2021, at 22:23, Mike Gorman notifications@github.com wrote:

 Closed #1542.

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Draughtworx commented 3 years ago

That's amazing, Mike and Sean really are true legends of laser's and diagnosis and repair. Less than half a day after it going down it's back up again. Thanks guys. I doff my cap to you both.