Overall, I’m happy with the OMT laser. Given the price, I got better than I really expected. And Lightburn has been a Godsend! Especially the SVG editing capabilities - I’m definately not a graphic artist and while comfortable with Photoshop, I found Illustrator, Inkscape, etc. to be very challenging.
Today I finally got around to looking at backlash, which was only out 0.1mm. However, that testing highlighted something I’ve suspected for awhile - that the bearings on the Y-axis stepper are trash. There is not only a loud rumble when moving in the Y-axis, but when moved by hand I feel definite bumps. X-axis is smooth.
Note the zigzag in the vertical lines…
Machine settings for the test:
Thoughts, suggestions welcome!
I note that getting to that part of the machine is going to require pulling the entire traveller. There are only 4 bolts holding everything in place, and of course,wiring to motors and sensors.
My system setup:
Added two idler pulleys and use silicone O-rings to stabilize subject.
I finally settled on a piece of sheet steel on the bed and I LOVE these heavy duty magnets for stabilizing stuff.
(Carbon stains from a test cut of a cardboard stencil - still trying to wrap my head around stenciling!)
One of my dowels: