Currently having an issue where for some reason, certain segments of objects are getting skipped while running a rotary. I’ve tried a few different step sizes and overlaps, and it consistently skips these areas.
Here’s a photo of the issue (note the darkened stripes where it is not engraving):
What are your fill settings for that layer? The fact that everything being “skipped” happens to be horizontal stems that are quite thin, and all the thicker parts of the letters are ok, suggests it could be a timing issue, or possibly just settings. If you slow down the engraving speed a little, does it improve?
That was exactly it… explains why it was working before too! Put the speed back down to 500mm/s and it worked fine. So I need to run cleanup passes slower and lower power I suppose.
Is this the laser skipping it or the software? Because the preview shows the lines being fully covered on the skipped sections even at higher speeds.
Chuck or roller? If a chuck–You didn’t mention your rotary steps, but assuming 12800, your rotary microsteps 0.0215 mm on the surface (6400 microsteps 0.0106mm) with an object of that diameter, so if your split and overlap are not multiples of that you will not get your best engraving as the settings are telling the rotary to stop in places it physically can not. Not a software issue, a microstepping issue.
The laser - that’s why I said “timing issue”. The software sends commands to the controller to tell it when to fire the laser relative to when the movement commands are issued. These are “Start TC”, “End TC”, etc. (TC = timing correction). Because of delays in the electronics, the laser might need to be signaled a little bit in advance of the galvos moving, so it has time to actually fire (or, conversely, the laser might need to wait for the galvos to just start moving before it fires).
