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Author Topic: Losing position PLEASE HELP!!!!!  (Read 3388 times)

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Losing position PLEASE HELP!!!!!
« on: June 14, 2012, 01:35:32 PM »
As I'm running i loose position. Running simple toolpath +60" back to 0 on my Y axis, it's only loosing position going back to 0. About .125" every 2-5 minutes. What is going on????

Please someone help!!!

Offline Glenn

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Re: Losing position PLEASE HELP!!!!!
« Reply #1 on: June 14, 2012, 02:56:33 PM »
Hi surf,
  Check all mechanical linkages,loose wiring, then if you still have the same problem, it is probably that you have steppers tuned to fast.
 Retest by cutting air, and start 1/2 the speed that you are set at now, and gradually increase the max speed until
the motors miss a step, then back the max down 20% and you should be about where the motors can run safely without fear of missing any steps.
   Every one wants the fastest speed they can get from a stepper, but that speed isn't really the most reliable speed.
 I would like to hear how things turn out for you.
Glenn
Don't assume anything.....it'll make a Manager out of U and Me!
Re: Losing position PLEASE HELP!!!!!
« Reply #2 on: June 14, 2012, 03:19:39 PM »
It loses position at any speed 200ipm and 20ipm
Re: Losing position PLEASE HELP!!!!!
« Reply #3 on: June 14, 2012, 03:36:30 PM »
more info

two things
1. 5v power supply to drive
I have the ground attached to the chassis and power to drive pul+ and dir+
If I disconnect the - from the 5v the stepper starts moving slow

2. Power ground to the chassis

Question, if the neg- on 5v the same as chassis ground??
Re: Losing position PLEASE HELP!!!!!
« Reply #4 on: June 14, 2012, 03:53:35 PM »
amazingly off

 off position .125" every 5 minutes

doesn't miss

every time

Offline Hood

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Re: Losing position PLEASE HELP!!!!!
« Reply #5 on: June 15, 2012, 02:05:56 PM »
Every 5 mins regardless of distance moved or speed moved in that 5 min period?
Hood

Offline RICH

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Re: Losing position PLEASE HELP!!!!!
« Reply #6 on: June 15, 2012, 06:21:34 PM »
No need to to post the same problem twice.  The info below is from your other post which will be deleted.

I'm trying to cut a part and my Y axis is constantly losing position. This is driving me nuts!!

What is causing this???

under the hood:

Keling Nema 34 1200oz, Drive KL-9082, Apollo I Breakout Board V1.0 (MachMotion)

Am I missing some setting?

RICH

Offline RICH

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Re: Losing position PLEASE HELP!!!!!
« Reply #7 on: June 15, 2012, 06:41:02 PM »
Sorry, I don't understand what your saying.
Are you saying that you have the machine axis  constantly moving back and forth 60" and after 2-5 minutes the axis on returning to zero
is off?

RICH
Fixed
« Reply #8 on: June 18, 2012, 05:51:03 PM »
Fixed the problem

Thanks everyone

Offline Glenn

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Re: Losing position PLEASE HELP!!!!!
« Reply #9 on: June 19, 2012, 10:35:18 AM »
Hi Surf,
  Glad you fixed the problem- I'm curious as to what you found?
Thanks,
Glenn
Don't assume anything.....it'll make a Manager out of U and Me!