I worked up a similar design at:
For adjusting the diameter cut a slot and measure it. See: https://docs.carbide3d.com/shapeoko-faq/how-to-calibrate-the-machine-for-belt-stretch/
I worked up a similar design at:
For adjusting the diameter cut a slot and measure it. See: https://docs.carbide3d.com/shapeoko-faq/how-to-calibrate-the-machine-for-belt-stretch/