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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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Fix intermittent connection on Sheila's lid interlock #1563

Closed arthurrowland closed 3 years ago

arthurrowland commented 3 years ago

Reporting on behalf of someone whose name I didn't catch using Sheila today.

As I understood it:

I don't currently have time to diagnose and fix. Could be interlock issue?

Robotorium commented 3 years ago

Sometimes Sheila's door sensor moves out of true and she doesn't detect that the door is shut. I completely forgot about that. It's on the right hand side when you open the door.

Op wo 24 mrt. 2021 14:24 schreef arthurrowland @.***>:

Reporting on behalf of someone whose name I didn't catch using Sheila today.

As I understood it:

  • Laser worked well for most of day (~5 working hours, don't know how much machine-time)
  • Laser head moves but does not fire
  • Turning off and on again did not resolve

I don't currently have time to diagnose and fix. Could be interlock issue?

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Robotorium commented 3 years ago

Or the lid, rather.

Op wo 24 mrt. 2021 14:26 schreef Snoof Hattersley @.***>:

Sometimes Sheila's door sensor moves out of true and she doesn't detect that the door is shut. I completely forgot about that. It's on the right hand side when you open the door.

Op wo 24 mrt. 2021 14:24 schreef arthurrowland @.***>:

Reporting on behalf of someone whose name I didn't catch using Sheila today.

As I understood it:

  • Laser worked well for most of day (~5 working hours, don't know how much machine-time)
  • Laser head moves but does not fire
  • Turning off and on again did not resolve

I don't currently have time to diagnose and fix. Could be interlock issue?

— You are receiving this because you are subscribed to this thread. Reply to this email directly, view it on GitHub https://github.com/DoESLiverpool/somebody-should/issues/1563, or unsubscribe https://github.com/notifications/unsubscribe-auth/AHHMPXUH3IH3AZO45INQWI3TFHYZRANCNFSM4ZXLZ3MQ .

arthurrowland commented 3 years ago

Thanks Snoof, I just did a quick test and the beam does fire. I didn't load a file but seems very likely it will work. And before I'd submitted this comment the person mentioned in first post went back to using it after a stint on Gerald.

On a related note, not one I reported at the time, Sheila did stop firing in the middle of a cut a couple of weeks ago. I assumed this was due to a large file (complex geometry) and the CNC code was truncated at some point. If I recall right (unreliable narrator), it stopped moving and firing at the same time. Might do a deliberately huge file at some point to test this hypothesis, unless anyone else has figured it out already :)

Robotorium commented 3 years ago

I don't think that's ever happened to me, but knowing you the file is probably bigger and more complex than anything I've ever made 😂 I'll see if Chris has any ideas when he gets out of work

Op wo 24 mrt. 2021 14:47 schreef arthurrowland @.***>:

Thanks Snoof, I just did a quick test and the beam does fire. I didn't load a file but seems very likely it will work. And before I'd submitted this comment the person mentioned in first post went back to using it after a stint on Gerald.

On a related note, not one I reported at the time, Sheila did stop firing in the middle of a cut a couple of weeks ago. I assumed this was due to a large file (complex geometry) and the CNC code was truncated at some point. If I recall right (unreliable narrator), it stopped moving and firing at the same time. Might do a deliberately huge file at some point to test this hypothesis, unless anyone else has figured it out already :)

— You are receiving this because you commented. Reply to this email directly, view it on GitHub https://github.com/DoESLiverpool/somebody-should/issues/1563#issuecomment-805881992, or unsubscribe https://github.com/notifications/unsubscribe-auth/AHHMPXQ7OMONDE4OBO6KI7TTFH3OVANCNFSM4ZXLZ3MQ .

arthurrowland commented 3 years ago

I think we're OK on this issue so I'll just leave you with this photo by way of a partial explanation for the large file size :P

image image description: photograph of wide bracelet worn on Arthur's wrist, made from plywood laser cut with geometric pattern to allow it to be very flexible

Robotorium commented 3 years ago

Reopening this - she's cut stuff like that before with no issues. She was doing the same again quite a lot today, may need looking at. I noticed, when fiddling with the sensor that detects whether the door is shut, that the relevant wires hang down over a part that gets reasonably warm, so I'm not sure if that's related somehow.

JackiePease commented 3 years ago

This happened a couple of times today while Liz Taylor was cutting.

arthurrowland commented 3 years ago

Specified the issue as I'm pretty confident it was the interlock.

I noticed there was a bolt missing and that it was possible to rotate the sensor around the other screw:

sensor in the laser cutter's frame with one bolt and one empty hole

My theory is that this is the cause of power cutting out - the screw in the lid failing to make reliable contact since the sensor is lower than it should be.

So I have refitted it with two tight bolts and tightened both (sorry for using a different bolt head - promise I'm not trying to wind people up with all this disorder):

sensor in laser cutter with two bolts in

I ran a brief test to check it fired - worked for me.

Could Sheila users keep tabs on this and report back if it happens again?

If we don't hear of problems by the end of June, I move to close this issue.

arthurrowland commented 3 years ago

Haven't heard anything and seen a fair few sheila-sessions, so think we're safe enough to close this :)