Re: Built first axis

Using NEMA 23 124oz motors with a unipolar driver.


--- In CAD_CAM_EDM_DRO@yahoogroups.com, "turbulatordude"
<davemucha@j...> wrote:

> --- In CAD_CAM_EDM_DRO@yahoogroups.com, "starcast82"
> <starcast82@y...> wrote:
> > on my cnc and I am currently getting a top speed of around 14
> inches
> > per minute. I'm wondering if this is in the ballpark. I'm using a
> > motor controller I designed and 12 threads per inch acme rod.
> >
> > Thanks
>
> More data needed. direct drive, motor type, gearing ratio,
> full/half/quarter step ?
>
> from this data, you should be able to figure out steps per inch.
> select motor from below and figure steps per minute
>
>
>
> taken from post on message 45509
>
> ...As a rule of thumb, steppers are pretty much out of torque
> (rapids) at:
>
> 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.
>
> .....