Max stepper speed (Sherline)

"IMService" <imserv@v...> wrote:
Check out this chart:

>http://www.empiremagnetics.com/global_pages/torque_charts/calc_st_tor

q_U21.htm

>
> They have graphed the torque curves for a stepper motor at various
> supply voltages. Note on the top chart (2 amp motor), curve #2.

At 5 rps (revolutions per second)

> the torque drops from over 50 to around 17.

"Daniel J. Statman" <titanium@c...> in Sherline group wrote: "I am
using TurboCNC with a 75 MHz Pentium 1 computer running DOS. I have a
26VDC power supply connected to a Xylotex drive running NEMA 23 180
oz-in stepper motors (200 step per revolution) running in 1/8th step
microstepping mode."

I am using the Sherline 9.7 kg-cm (134 oz-in) stepper, camtronics 2A
driver, 36VDC supply, and steppers stalling badly at 16-18 ipm, and
greedy for more.

Hope Statman is reading this post. Is the 180 oz-in stepper a triple
stack? A 180 oz-in stepper is only a 34% improvement over my 134 oz-
in, which proportionately will be 24 ipm, so there must be something
I can do to improve the performance.

What can I do to get the Statman kind of performance?

Peter