3XL accuracy check

[Montellopnds (Steve)]

I have a lightly used Shapeoko 3XL. I am working a project to cut walnut 1” X 18” with some pockets. The 1” part that I am cutting ends up at .9750” rather than 1”.
Should I always increase the dimensions in Carbide Create to cover the difference or is there something wrong with my machine accuracy?

Steve

[CthulhuLabs (Dragon Claw Constructs)]

That is more than half a millimeter which is significant. I would recommend replacing the belts and pulleys:

Shapeoko Maintenance Kit

If that does not fix it you might need to calibrate the steps per mm in GRBL.

[WillAdams (William Adams (Carbide 3D))]

If the machine is mechanically sound consider:

Calibrating the machines over long distances

The typical technique for machine calibration: https://my.carbide3d.com/faq/belt-stretch/ depends on precision measuring tools, and is limited by the reach of the tools in question. EDIT: It also depends on access to the MDI — if using Carbide Motion v6 it will be necessary to enable this in Settings | Options: [image] It should be possible to cut strips from a suitable blank of material, one along each axis — so we set up a square file which matches an available blank of material: [ima…

[Montellopnds (Steve)]

Thanks so much for the input into getting my machine more accurate. After some tweaking, I am around .04mm on X, spot on y and .08mm z.

After all these adjustments I reset up my machine. The only issue I see is that my X axis when jogging seems to glide to its position. Starts out slower then ramps up and glides to its spot. It glides correctly to the so it should. It never did this before. Is this an issue?

Thank you
Steve