Apparent Step Errors

That would bring it to 2.5CM per revolution, so right in the sweet spot for plasma when using steppers as you can still achieve decent velocities for rapids. Even 1:3 will do just fine, there are some very cheap ones using T2 belt and 20:60 pulleys on ebay, seller is "ideaformer", i got 6 of them from him and some other stuff, he is the only one i never had issues with delays, and almost always provides a valid tracking number. BTW, they are under 5$ per set, if i remember correctly, just be sure to select the inner holes for your needs.