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DoESLiverpool / covid19

A location for our PPE (face visor, and other?) help during the COVID-19 pandemic
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Gerald Dropping power #111

Closed jadenoon closed 3 years ago

jadenoon commented 3 years ago

Gerald is dropping power going towards the centre and to the right when cutting. Cuts fine right in the left hand corner but will not cut through 3mm MDF going towards the right even when speed is reduced down to 8.

arthurrowland commented 3 years ago

I had some trouble with Gerald on Friday and didn't have time to document it at the time.

Short version: I think the beam is out of alignment due to a small twist in the gantry caused by the right-hand y-axis belt tension, after I tried to fix it. So adjusting the mirror alone would not resolve it.

Full version: On Friday morning I let the laser hit the y-axis limit at the back of the bed. Towards the end of the next cut I was getting a split beam effect with burnt shadows around the cut, and very low power. I then noticed the right hand y-axis belt was very slack (resting on the surface below) and that the clip had come loose and was missing a nut. I tightened the belt back up, replaced the M3 nut (the original must have fallen down the back) and realigned the mirror on the left with the help of @amcewen. It seemed to be cutting well (sharp and full power) in the afternoon but there was a drop off towards the right of the bed. We didn't know how to fit the belts to get it reliably orthogonal (had to use spell check on that word) so I think there's still a twist, causing the loss of focus / drop in power.

Paging @DoESLiverpool/laser-maintenance via @magman2112 (I don't think I can tag the former in this covid-19 repo).

amcewen commented 3 years ago

@magman2112 adjusted the belt tension on Saturday which (I believe) fixed the skew in cutting, but maybe the alignment still isn't spot on?

magman2112 commented 3 years ago

It took a couple of attempts, but I sorted out the left hand belt tensioner on Saturday and also corrected the squareness of the horizontal beam (it was out by approx 10mm across the bed).

I did also check the alignment of the laser, as it was well out, but I on,y did this quickly, as @JackiePease and I were conducting a laser training session at the time.

It will likely be tomorrow before I can come in and check the alignment on Gerald though.

arthurrowland commented 3 years ago

Brett cleaned the mirrors this morning and reports it is working well now.

JackiePease commented 3 years ago

Closing this as @arthurrowland has added now a link in https://github.com/DoESLiverpool/somebody-should/issues/1543

jadenoon commented 3 years ago

Ahh great! Glad to here!

Sent from my iPhone

On 25 May 2021, at 12:51, Jackie Pease @.***> wrote:



Closing this as @arthurrowlandhttps://github.com/arthurrowland has added now a link in DoESLiverpool/somebody-should#1543https://github.com/DoESLiverpool/somebody-should/issues/1543

— You are receiving this because you authored the thread. Reply to this email directly, view it on GitHubhttps://github.com/DoESLiverpool/covid19/issues/111#issuecomment-847803426, or unsubscribehttps://github.com/notifications/unsubscribe-auth/AOCHRD4QTSP5EWXHDA4UI33TPOFNTANCNFSM45MTADNA.