Quote Originally Posted by Jonathan View Post
If you really want 25mm/s have you considered changing the pulleys? I did that to the extreme on my router and got 1000mm/s on Y (not tried X yet)...just depends if you can live with a little less resolution. Try it and see? Add about 30% more teeth to the motor pulley.

Been there, done that already :naughty:

I quarter step at .005 mm so the positioning is already a bit springy and I can be up to minus 0.01 mm out on a width according Mr Mitutoyo. It never seems to go plus for some reason.

I prefer to call it 0.4 thou, or maybe 10 microns, because that sounds better :whistling:

I gave it a few hours with 15 mm/s rapids yesterday without losing position. Think I will wind it up to 20 mm/s next time I have a job where I am not particularly worried if it goes tits up.