Machsupport Forum

Mach Discussion => General Mach Discussion => Topic started by: Mason Dixon on December 05, 2016, 04:19:46 PM

Title: Mach3 not going to speed I set in Cam program
Post by: Mason Dixon on December 05, 2016, 04:19:46 PM

Mach3 not going to speed I set in Cam program. I set it for 600ipm and it is only going 335.

Title: Re: Mach3 not going to speed I set in Cam program
Post by: Tweakie.CNC on December 06, 2016, 02:05:23 AM

Are your motors set to >600 ipm in Motor Tuning and will they jog at >600 ipm from the keyboard ?

Tweakie.

Title: Re: Mach3 not going to speed I set in Cam program
Post by: joeaverage on December 06, 2016, 02:06:18 AM

Hi,
firstly can your machine do 600ipm. It can go only as fast as you set in the motor tuning page.
In addition the kernel seed may limit the speed you can go.

Lets say you steps/inch are 4000.
600 ipm is equivalent to 10 IPsec, 10x4000=40,000 pulses per sec. If your kernel speed is 25,000 per sec
the your out of luck, you cannot produce enuf pulses in a given time to drive the axis that fast.

Another issue is with co-ordinated motion, if you have one axis which is slow, a motor or driver limitation say, then
Mach will reduce the speed of the other axes to match the slow one if its incorporated in the move.

One last point is to make sure that federate/ rapidrate Overide is not in effect, I've overlooked that before!

Craig