chevynut
01-03-2014, 11:22 PM
I have a Miller 220V spot welder and I have found it to be quite handy. However, it only has a switch under the handle to manually control the weld time and it can be very inconsistent, especially on thin metal when you need a short weld.
I plan to build a timer for it, based on some information I've found on the internet. I will be switching the power to the unit so current will be fairly low. I think I will need to push the switch on the welder, then hit the power switch that starts the timer to give a momentary pulse, with the pulse width controllable via a time delay relay. I would like to have it work by just pushing the switch on the spot welder, but I haven't seen any designs to do that so I may just have to somehow short the switch out. Seems like the switch on the welder would be redundant.
Have any of you guys done this yourselves? Any tips?
Here's one source: http://www.5bears.com/welder.htm
I plan to build a timer for it, based on some information I've found on the internet. I will be switching the power to the unit so current will be fairly low. I think I will need to push the switch on the welder, then hit the power switch that starts the timer to give a momentary pulse, with the pulse width controllable via a time delay relay. I would like to have it work by just pushing the switch on the spot welder, but I haven't seen any designs to do that so I may just have to somehow short the switch out. Seems like the switch on the welder would be redundant.
Have any of you guys done this yourselves? Any tips?
Here's one source: http://www.5bears.com/welder.htm