stepper locking up

[luther]

hello i was wondering if you guys could help me? my motors work fine at 20" per min. but they lock up at 50" per min. any ideas? i'm useing hobby.com motors and pro board with kcam.

[CurtisU]

It sounds like it could be a problem with stuff upstream of the controller.

I have an old Tosh laptop running Turbocnc. If I run Turbocnc from Windows 98 I get a pretty steady clunk when any axis is in motion, no lockup, but an interruption. Has something to do with interrupts I think.

You're probably going to have to be more descriptive for us lot.

[luther]

yes you right a interrupts and it stop the motors. i'm running a 2005 h.p. with 160 gb hard drive. is this enough inf.

[DRP]

I hope so I am trying to run an older HP on 20gb although its "xp" I am also having lock ups, Never thought of inadequate PC spec, Ill watch this thread with interest.

[CurtisU]

So you haven't said what software you're using, that'll be important.

With my laptop, I have to restart in DOS to get smooth motion from TurboCNC.

You'd probably find info on the applicable users site/forum for your software.

Curtis

[ger21]

What do you mean by "lock up"? It could be that your just trying to push them too hard, or spin them too fast. What size motors, what are the ratings, what size power supply, how many rpm's are you spinning?

[CurtisU]

Good point Gerry, perhaps try running uncoupled motors at 50"/m.

[luther]

kcam is the program,and that is the proublem they run fine on TurboCNC. the rpm is 400 per min. and that is not the limit of the motors from hobby.com 305 in oz motors with pro board. but thanks for all the help.

[ger21]

try the Mach3 demo