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losing steps?
« on: April 14, 2008, 06:06:52 PM »
Newb questions  I'll have lots of them!
1)  How do I know if I'm "losing steps"?
2)  If run I my router out 6' on x and y sometimes I'll gain an extra .125" on x.  When I cut a simple 2"x2" square my x axis has extra .125" on x.  Stepper motors
           
3)  What is Step pulse and Dir pulse in motor tuning?  They are set at 5.

Thanks
« Last Edit: April 14, 2008, 06:18:31 PM by tclark »

Offline Hood

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Re: losing steps?
« Reply #1 on: April 14, 2008, 06:23:32 PM »
You know you are losing steps because the travel is not as programmed, ie DRO will read the correct distance but the axis hasnt moved that distance. If you have steppers then you may also hear it missing steps, it will whine.

Gaining doesnt sounds like you dont have your steps per unit set up correctly, however if you are saying it only happens sometimes then that cant be the case. What kind of setup do you have, what drives, motors etc and what type of machine. The more info about your hardware the better.

Some drives require pulse lengths to be longer than others, 5 is the highest you can set here but if you need longer then try the Sherline mode.
Hood

Re: losing steps?
« Reply #2 on: April 14, 2008, 06:55:33 PM »
Thanks for the help.
The motors are Keling  KL42H2150-42-8B.  One on y, one on z, and two on x.
The Drives are LOGITROL CNC CONTROL EQUIPMENT  Gecko 203V (4)
  700 watt 55 vdc coil drive  with
  CNC 7 amp Extra Duty 4 axis Micro stepping driver (2 phase)  1/10 micro step

Thanks alot for your help