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KOTUU2
Associate

Join Date: Nov 2007
Posts: 29

Current Fluctuation Problem

02/20/2008 1:49 AM

Dear all,

I have faced the problem with an MMA welding machine. The over current light is on after welding for 2 or 1 1/2 hours when it is used in normal welding. If this light is on, I switch off the machine and wait for 2 or 3 minutes and then I start it again. The light is off. But the light turns on again after two or 1 hour again. Kindly let me know whether it is the problem of temperature sensor or filter coil or fan capacity.

Thanks and regards,

Kotuu2.
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garth
Guru
Australia - Member - New Member Engineering Fields - Mechanical Engineering - New Member

Join Date: Sep 2006
Location: NSW Australia
Posts: 1101
Good Answers: 23
#1

Re: Current Fluctuation Problem

02/21/2008 4:10 AM

Kindly let me know whether it is the problem of temperature sensor or filter coil or fan capacity.

It could be a problem with any of these items, but is more likely you are exceeding your machines duty cycle.

Check the specification plate information and compare this to your welding process , your temp sensor is saving a burnout of your machine be happy it is doing its job.

__________________
 Dont get on to the roundabout if you dont know how to get off
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Heath
Active Contributor

Join Date: Jun 2007
Location: Los Angeles, Ca.
Posts: 15
#2

Re: Current Fluctuation Problem

02/21/2008 11:11 AM

What brand is the welder? You might want to check the specs. and determine what the duty cycle is before you spend any money.
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umpradhan
Associate

Join Date: May 2008
Posts: 50
#3

Current Fluctuation Problem

05/25/2008 3:06 AM

Dear Sir,

Your problem seems to be a genuine one.

One basic thing in the electrical engineering. Do not over load any electrical equipment.

Just try out the method of taking a break after every 90 Mts. It will definitely solve the basic welding operation problem which you are confronting.

Another solution is to install a temperature sensor. Once the welding equipment is nearing that cut off temp. point , just switch off the equipment and concerned be allowed to enjoy a break .

Regards,

Ulhas Pradhan

Retd. Additional Chief Engineer GEB , Baroda.

Tel. No.91-0265-2775463.
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