Recently moved over to a new galvo laser with rotary attachment, and have noticed jobs using the rotary tend to simply stop just before the end, usually around 80-90% complete.
When the issue strikes, the job simply stop engraving at the rotary slice it is on, and cannot even be stopped when pressing the “Stop” button.
Lightburn must be fully restarted after this to get functionality back.
Using a roller rotary, which to my understanding has no “maximum” rotation, and the issue appears randomly on jobs of various sizes.
Rollers are set up as per the manual, and the issue ocurrs in both X and Y rotation axis.
Further detail:
-Lightburn V1.7.08
-ComMarker Omni 1 (UV JCZFiber Galvo)
-ComMarker R5 rotary roller
-Marking a 220mm circumference mug with a 60mm wide image
I don’t see anything that jumps out, does it do it when you select “Run all shapes in each slice” ?Nothing I see would suggest you are even close to running out of memory.
Heat or bad cable? Summer apon us, heat issues popping up here and on the LMA forum.
Restart using task manager, or just clicking the X? Does it show LB “Not Responding”?
The freeze itself is strange - most of the buttons on the rotary window are non-functional, but “pause” still pauses the job timer (although unpausing does not resume the job).
The rotary window can be closed, but not re-opened, as the standard “frame” and “stop” buttons no longer do anything.
Lightburn can be closed as normal with the X, and in fact still allows saving of the document.
My only guess is some sort of communication breakdown, where lightburn is continually waiting on some sort of feedback from the laser, but never receives it - but I would expect some sort of error on the Lightburn side if this were the case, rather than just a half-crash.
The Galvo rotary is a strange animal, still have X and Y. I have stress tested the heck out of it, up to 20,000 slices 192000 microsteps per rotation. Much over that it takes forever but doesn’t actually act like a freeze, more like still thinking.
Hopefully something simple, bad cable, connector. You are not running through a hub are you? I would suggest new cable direct from computer to laser, nothing else plugged in, and run a test. Sorry, not much help, just following along.
Is it possible you are running out of travel range with the Rotary? Diode machine: I jog my rotary until the Yaxis position is near the middle of the travel in the setup. My laser reports an out of bounds, but yours may not.
Had a suspicion it may have been some sort of travel limit, but I can’t seem to find any sign of what this limit would be.
I can jog this thing all day in both directions and it just keeps turning without issue.
Tried a burn that goes the entire way around the cup, and it still got to around the 80-90% mark, even though that is much further around the cup than the previous failed prints, so I don’t think it’s any physical limit in play.
I’ll try re-seating and replacing a few pieces along the chain, new USB cable etc, see if that does anything - but suspecting some sort of software oddity may be to blame here.
Galvo’s don’t run out of travel on a rotary for a long way, one of the experts could probably tell us, but it takes a lot more then we are talking. like 100 times more. There is a bug that popped up on framing, but that only happened long before I got to the rotary window.
Unless maybe if this was checked…
@ziqh Post the file if you like, I could run it and see what happens.
The bug is using the framing button to start the operation. Objects in the negative direction would freeze, but that was before engraving started.
Anyway, this was my solution to that bug: Start with “Start” and then frame from the rotary window.
Replaced a few cables, secured a few plugs, and tried a few different shapes and sizes, but the issue kept cropping up.
Out of desparation, tried upgrading Lightburn to the pre-release V2.00 and the issue is completely resolved.
Still no idea what the cause was, but it appears to have been fixed in the pre-release, so I’ll just carry on using that.
@Ziqh I have been experiancing this with Lightburn also, and it is very frustrating, I find when I am trying to center everything frame, stop frame stop, then engrave, pause job to check outcome then try to start again it won’t. First post I have found that fit my exact symptoms. Has the Pre realease continued to function correctly? I do have it, however Don’t use it much as of yet.
@Nellie448 Probably want to start a new thread, this one is marked as solved. And this is only happening with the rotary? Please include screenshots of setup window, etc. Include the file also if you like.
@Albroswift I was just hoping if he could confirm whether or not he is experiancing the issue with the pre release. And it isn’t a setup thing as it happens with all my Glavos with multiple profiles. it just acts like it isn’t connected anymore. But thanks for the Reply Al.
Hi Nellie,
I can confirm that the pre-release has continued to work without issues so far.
Did a run of around 20 of the job that was giving me issues before, and all completed without issues.
To be honest, once it started working, I simply uninstalled the standard release, so I can’t compare the two.
I can only assume it’s some sort of rare software bug that has been accidentally fixed in the pre-release.
@Ziqh Thanks for the reply, and happy its working for you. I unfortunately tried on the Pre release, and tested it, seemed to work, however on the actual mug, I wanted to change my settings slightly for a better result, I paused, stoped, then tried to go back to zero, with no success. The programe continued to think it was in framing, and no control buttons functioned. Communication with the laser just stopped.
