Well I know that "leadscrew whip" limits things.. and I've read that on slower PC's the actual data output can limit speeds.. and I guess spindle rigidity will factor in there too, but is there a way to figure out max speeds when these factors are known? Steppers lost torque as speeds ramp up, so pushing it too fast will cause lost steps maybe?

For example my machine will be about 20"x20" (x,y) and will be using 3/8 acme 2 start 5 turns per inch leadscrews. NEMA 23 steppers. laminate trimmer spindle. Steel frame with aluminum and 1" thick PVC parts for the gantry. Ill be running mach3 with a P4 2.4 G machine.

Whats my limiting factor here? Any estimates on my max speed? I plan on mainly cutting hardwoods and engraving/drilling aluminum.

thanks everyone for any speed-related comments.

~Steve