Re: Built first axis

--- 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.

.....