I have the OmTech 50 Watt engraver with a Ruida Controller. Over Scanning works when engraving at 90 degrees, but does not work when engraving on an angle (see atch photo). Is there a way to adjust this in Lightburn to stop the burning on the edges?
Ruida controllers only support engraving passes parallel to the X or Y axis, not anything in between. Although you can insist on using a different angle, it basically doesn’t work.
However, you can rotate the design by 45°, engrave parallel to the X axis, and it should come out the way you want.
[quote=“ednisley, post:2, topic:99427”]
Ruida controllers only support engraving passes parallel to the X or Y axis, not anything in between. Although you can insist on using a different angle, it basically doesn’t work.
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Can you elaborate a bit? I think I understand or translate something wrong, because I have no problems with e.g. 45 degree engravings with my Ruida controller (KT332N).
Per the Scan Angle doc:
Scanning at non-90 degree angles is “emulated” using normal cutting moves. It works, but it’s mostly useful as a style option, and not recommended for general use.
The heavier Y axis limits the overall speed & acceleration of any vector not exactly parallel to the X axis, so the machine settings surely affect LightBurn’s calculation of the overscan distance on either side. There may be a corner case lurking in there somewhere, but I think the usual advice applies: If it hurts when you do that, don’t do that.
Thanks for the information. I probably didn’t notice it because my (primary) 45 degree cross hatch engravings show no signs of overscan or other errors. It may be that I will run into problems at higher speeds, I generally use my machine a bit “conservatively” and feel good about it.
NOTE: If you have a DSP controller, we do not advise using angles that aren’t a multiple of 90 degrees. Horizontal and Vertical scanning is supported natively by the hardware, and it will automatically handle over-scanning beyond the sides of the image to get the head to full speed before engraving starts. Scanning at non-90 degree angles is “emulated” using normal cutting moves. It works, but it’s mostly useful as a style option, and not recommended for general use.
From this document…
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