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Author Topic: Suddenly rough stepper.  (Read 5193 times)

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Suddenly rough stepper.
« on: May 14, 2007, 11:55:08 AM »
an hour into a job I hear something isn't right. a problem has developed on the X axis, where it is losing 5mm at a time, going x+, and a few mm x-. I have dissassembled down to the motor itself, and the problem is still evident - hand held the motor will tug tug tug twich twitch twitch as it turns, rough, like a missing car engine, instead of a nice sweet whine, unless I ask for some rapid movement, when as it reaches higher speeds, it becomes smooth.

Classic symptoms of.....?

Thanks in advance.

Jim

Offline Chaoticone

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Re: Suddenly rough stepper.
« Reply #1 on: May 14, 2007, 12:33:34 PM »
Hey James,
    What kind of drives are you using? Do they have any tuning provisions? At what speeds do they run good and bad? Is this a new problem or a new set up?

Brett
;D If you could see the things I have in my head, you would be laughing too. ;D

My guard dog is not what you need to worry about!
Re: Suddenly rough stepper.
« Reply #2 on: May 14, 2007, 01:08:45 PM »
Hi Chaoticone.

They've been running fine, it's a new problem, developed mid-job.  They are all tuned nicely, and I checked that nothing had got altered in the motor tuning.
I dunno what the drives are, i'll try & see

Jim
Re: Suddenly rough stepper.
« Reply #3 on: May 14, 2007, 02:11:25 PM »
Ah Gekko's.

Any ideas?

Jim

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Re: Suddenly rough stepper.
« Reply #4 on: May 14, 2007, 03:00:49 PM »
Jim,
    I have sent you a pearsonal message.

Brett
;D If you could see the things I have in my head, you would be laughing too. ;D

My guard dog is not what you need to worry about!
Re: Suddenly rough stepper.
« Reply #5 on: May 18, 2007, 09:37:55 AM »
Hi all

Well, the new motor does the same, do I guess it's not that.

What's the next step?
Nothing changed, it went rough mid job. What could alter and cause this problem?

Jim

Hood

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Re: Suddenly rough stepper.
« Reply #6 on: May 18, 2007, 01:11:21 PM »
Swap over a drive and see if the problem moves with it.
Hood
Re: Suddenly rough stepper.
« Reply #7 on: May 18, 2007, 01:45:26 PM »
Thnks Hood, will do. All terminals or 1 through 6 or what? (they are a way apart)

Also noticed the X power on light dims well before the others after power off....

Jim

Hood

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Re: Suddenly rough stepper.
« Reply #8 on: May 18, 2007, 01:48:53 PM »
 If your cables will reach from one drive to another just swap over the complete plugs but if they dont then unscrew the suspect  drive and move it over and connect in the other drives plugs.
Hood
Re: Suddenly rough stepper.
« Reply #9 on: May 18, 2007, 02:18:01 PM »
 :-[ Oh yeah. That was easy.
The problem follows the gecko

So this means....?
Jim