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rajnish
Participant

Join Date: May 2011
Posts: 2

Stepper Motor

10/27/2012 6:07 AM

we have Juki kazz machine and on this machine a 3 phase stepper motor is used as main motor. This motor got jam. we open it and found its permanent magnet on rotor in two pieces . we joint it and fitted the motor its free now and when we installed on machine its run with high speed and heatup with in 60 sec without any load and after that its not run please suggest whats the problem
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Joshi
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Join Date: Oct 2007
Location: India
Posts: 1246
Good Answers: 34
#1

Re: stepper motor

10/27/2012 7:24 AM

It is as clear as day. Buy a replacement 3 phase stepper motor from OEM & replace it.
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lyn
Guru

Join Date: Oct 2008
Posts: 42355
Good Answers: 1693
#2

Re: Stepper Motor

10/27/2012 9:55 AM

You have two choices.

1. Buy a new motor.

2. Send the old motor to a competent motor re-builder.
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LOCKDUKE
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Hobbies - Target Shooting - New Member

Join Date: Jan 2011
Location: Indiana
Posts: 558
Good Answers: 14
#3

Re: Stepper Motor

10/27/2012 11:14 PM

Your magnetic field is no longer correct to run the motor. When the magnet fell out of the holder it probably hit the armature then broke. Once the magnet breaks you have two fields not one, causing the motor to speed up but losing torque, thus heating up trying to do the work it was originally intended to do and now can't.

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Andy Germany
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Popular Science - Weaponology - New Member Safety - ESD - New Member Hobbies - Fishing - New Member

Join Date: Sep 2006
Location: Near Frankfurt am Main, Germany. 50.390866N, 8.884827E
Posts: 17996
Good Answers: 200
#4

Re: Stepper Motor

10/28/2012 9:53 AM

I have to agree, the only fix is a new motor.

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kolokol
Active Contributor

Join Date: Jan 2012
Posts: 16
#5

Re: Stepper Motor

10/29/2012 8:44 AM

If OEM or motor re-builder cant be reached because of whatever reasons, try finding out the original magnet specifications (like dimensions, field strength etc.). Next step would be to procure a magnet with the same specifications. Lastly re fix it and run.

Best Of luck.
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Users who posted comments:

Andy Germany (1); Joshi (1); kolokol (1); LOCKDUKE (1); lyn (1)

Previous in Forum: Low Forward Power Protection   Next in Forum: Design of Automatic Voltage Stablizer Using Brentford Voltage Regulator

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