Re: G0704 RAPID SPEEDS
its not amps that give you speed with steppers but voltage and inductance.
No stepper will be using full current at 150 IPM. Most will be drawing less then a third of there rated current.
For a given voltage system lets say 50V the only thing that will determine top speed is the inductance of the steppers.
For 300 IPM I think you need to spin a stepper at 1500 RPM with direct drive.
This is a chart of a 6.1A 640oz stepper.
http://www.automationtechnologiesinc...80-45-8ATC.pdf
As you can see it makes vary little power at 1500 RPM.
You could gear up you stepper or go to a faster screw but its hard to get steppers to work well at 1500 RPM.
The 570oz nema 23 stepper is really good in this way.
youtube videos of the G0704 under the name arizonavideo99