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Participant

Join Date: Aug 2005
Posts: 2

Idramat Motors (from Bosch Rexroth)

02/05/2007 6:11 AM

Im a mechanical engineer and im working in a wire mesh plant. We have a welding machine with three Idramat motors(synchronous motors) type MHD115. The last year we are facing continous problems and failures of these motors. Does anyone knows something or experienced such problems with these motors?

Kind Regards

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Guru
Brazil - Member - New Member Engineering Fields - Mechanical Engineering - New Member Hobbies - RC Aircraft - New Member Hobbies - Target Shooting - New Member Hobbies - Automotive Performance - Hey there... interested in exchanging information about car performance? Hobbies - DIY Welding - New Member

Join Date: Jan 2007
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#1

Re: Idramat Motors (from Bosch Rexroth)

02/05/2007 7:24 AM

What type of failures? If burnt, could it be a current draw through the motors leading to failure, maybe a ground? They are normally intented to allow controll of the wire feed in the torch and, as they are so close to the elements in the power circuit... just an idea.

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Participant

Join Date: Aug 2005
Posts: 2
#2
In reply to #1

Re: Idramat Motors (from Bosch Rexroth)

02/05/2007 9:21 AM

One problem seems to be in the coupling of the motor's shaft and the encoder, other problem is because of loosened of the permanent magnets and other because of the bearings. The problem is that all these happen too fast, almost under zero production!

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Commentator

Join Date: Feb 2007
Location: Nashville, TN
Posts: 63
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#3
In reply to #2

Re: Idramat Motors (from Bosch Rexroth)

02/06/2007 10:32 AM

From the limited information given, I would check for a grounding problem or an unwanted current path through the motor system. Welding current leaking through a motor will cause serious problems with the bearings and magnets.

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Anonymous Poster
#4

Re: Idramat Motors (from Bosch Rexroth)

02/06/2007 2:20 PM

In my experience, Bosch Rexroth is great to work with. Just get one of their engineers on the phone.

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