Broken machine?

[dybis]

I just bought a new Telmig 130 Turbo machine. The arc is not cut off when I release the trigger. The gas is cut off and the feeding of the wire stops. Is there something wrong with my machine? I have never welded before.. Thanks!

 

[Welderpaul]

It may not be broken - some MIG's have a permanently live feed to the torch. I'm guessing, but i am sure one of the other forum members can confirm this!
a permanently live feed to the torch is a sure way of catching a flash if you are not very careful!

 

[dybis]

Thanks for the reply! It is terrible to weld without the electricity cut off. As you said, you have to be exteremly careful when you start, and it is hard to start at the right spot. I guess I will modify the machine to support cut-offs, if it is not broken and can be fixed. Or should I learn to weld without cut off...?

 

[Drains]

I just googled it and found a site that says the Telwin has a non-live torch, so it shouldn't be that (which was my first thought). So your contactor isn't opening...
What do you hear when you take your finger off the trigger? If you can take a peek inside the casing, you should find the contactor in line with the main welding current feed. That should click on and off, with the trigger.

If there isn't a contactor... then it's a live torch and there's nothing you can do about it.

If there is a contactor and it doesn't click... then there's something wrong!

I'll get me coat....

 

[oddball90]

Check to see if it is meant to be a permenant live torch, some wolfs are a live torch. Would get back intouch with the seller cause all you are going to get is arc eye, every time you start welding. Unless you have a reactive welding helmet.

 

[dybis]

Thanks again. I will speak with the seller. I found a wiring diagram for a different MIG from a different supplier. I will have no problem to understanding the logic (I konw electronics), but I do not dare to open the case of the MIG machine as this might terminate the guarntee given by the seller (two years). I guess it is broken. It was a demonstration model I got with 10% discount.

 

[ashy]

I don't see why it wouldn't be possible to make this a non live torch using a relay if you have a bit of electronics know how.

 

[dybis]

I looked into the machine. It does not have a relay/contactor.

I guess I will do some modifications. Add a relay, so when the trigger is pushed, the relay connects main to the transformator. Then connect the wire system so it always feed wire when the electricity is connected.

Not sure what type of relay I need.