re: CncPRO top speed limit was Re: "metric" ballscrews? , and other misc.

Smoke,

When I've got a system running one S/W package at 600IPM, and then I
switch to CncPRO and it tells me (after I've entered and 'fiddled
with' the params of step size, accel, etc.) that the top speed is
145IPM, I am going to look at CncPRO as the culprit!

The 'mechanical system'(including drives) IS capable of 600IPM! And I
believe CncPRO is capable of the step rates necessary (from others
experiences). The Program has "decided" that my system will only go
145IPM...

Hope this helps.

Ballendo

P.S. I thought maybe 'slow computer' was the problem... Switched to a
pentium 366; same problem!

>If the "limit" for your system is set at 200 IPM using a .2" pitch
>on the lead screw, then with the same imposed limit, changing ONLY
>the screw pitch to .6" pitch would triple the fast rate to 600 IPM.
>Smoke

P.S.S. And also vastly reduce the torque available to move the
axis!!! If steppers are involved, we just went outside the stepper
torque curve!