Re: Built first axis

--- In CAD_CAM_EDM_DRO@yahoogroups.com, "starcast82"
<starcast82@y...> wrote:

> Using NEMA 23 124oz motors with a unipolar driver.

if you are connect on a 1:1 mount, you can expect nema23 speeds of
1,200 to 2,400 RPM

12 tpi on a 200 spr motor is still 2,400 steps per inch, with a Gecko
10x Microstepping drive, that makes it 24,000 steps per inch. at
24,000 hz, that is an inch a second or 60 inches a minute.

how fast do you need to go ?

>
>
> --- 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.
> >
> > .....