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Squiggly lines on Boss LS3655 with Lightburn

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2023-03-18

We got another Boss LS3655 delivered and setup went smoothly, belts are tight, lens is tight, mirrors are spot on, Bed is level, Head is 90^, alignment is perfect. We double checked everything. no issues. But, it’s printing squiggles on smaller font 1" size in light burn. these are Pre-loaded Fonts in lightburn, so no squiggle in the Original. Tried Sending to machine, vs. Start from Computer, no difference. Slowed everything way down no difference, until we hit about 50mm/s then it starts to go away. But, no way should it require that slow. Again 3" Letters, no problem 1" letters, gets Squiggly. Any recommendations on what this could be ?
C

    • Abel

      2023-03-20
      Just to verify: when you say “Both are X-Axis Movements”, the X axis is left-to-right in that picture.

If that’s the case, then there’s mechanical backlash in the Y axis, because it does not begin moving when it should and continues moving after it should stop. The squiggles are perpendicular to the X axis, which is dutifully hauling the laser head along.

There’s a loose screw somewhere between the Y axis motor shaft and the laser beam. My first guess, as always, is the setscrew securing the pulley to the motor shaft, so that’s a good place to start.

The number of times I’ve been absolutely certain I checked something, only to eventually find the problem was right there and how could I possibly have missed it right before my eyes is too large to mention.
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