[CAD_CAM_EDM_DRO] Re: Stepper motor speeds

At 4:26 PM +0000 11-03-02, turbulatordude wrote:

>Size 42, 300 to 600 RPM, 800 in-oz or more low-speed torque.
>Size 34, 600 to 1,200 RPM, 150 to 450 in-oz low-speed torque.
>Size 23, 1,200 to 2,400 RPM, 50 to 150 in-oz low-speed torque.
>Size 17, 2,400 to 4,800 RPM, less than 50 in-oz torque.

This seems too fast to me. Perhaps you would comment on this. Looking
at a 23 frame motor, in half step mode (400 steps per rotation), 1200
RPM means 480,000 steps per minute or 8,000 steps per second. I am
currently experimenting with 23 frame motors on Sherline tools using
both the Xylotex bipolar driver and a unipolar driver of my own
design. I'm stalling out at 3300 steps per second tops. It seems
unlikely that this tool will ever run twice as fast as I'm seeing,
and you list 1200 RPS as the low end.

I'm feeding both drivers with 24 volts.

What am I missing?

--

Bryan Mumford
Santa Barbara, California
http://www.bmumford.com