Hi, first post here and firsty thanks for the great forum. I have learnt a heap from the threads here.
I may be a glutten for punishment or just plain stupid but I just won two SIP T100P's (T90P) on eBay for a song. They are "new" but each with a different fault (so the seller said), one does not feed wire, the other does not arc. Me in my "wisdom" thinks to myself that these welders a fairly simple so they could not be two hard to fix or at least use the parts from both to make one. Anyway for a couple of hundred bucks it's worth a try.
I know that these units a very basic and don't have any bells and whistles and have some underlying "fualts" which many have improved on in the forum. So this was my plan:
1. Get a least one welder working as standard
2. Do the wirefeed brace fix
3. Do the steel liner fix
Now to address the poor duty cycle and lack of control:
4. Add a wirefeed transformer and PWM speed control - I have a 24V transformer laying around and a PWM controller can be had for AU$18 from Oatley Electronics
Now this is where my thinking needs some input from the forum.
5. Would adding the second transformer and bridge from the second welder in parallel with the first increase the available welding current and / or increase the duty cycle?
And just for the fun of it how about adding an SCR control to the primary side of the two transformers to adjust the welding voltage rather than using the 2 transformer tappings. Mike W on the hobartwedling forum posted his circuit that he used on his tig.
Am I just plain bonkers?
Scott
I may be a glutten for punishment or just plain stupid but I just won two SIP T100P's (T90P) on eBay for a song. They are "new" but each with a different fault (so the seller said), one does not feed wire, the other does not arc. Me in my "wisdom" thinks to myself that these welders a fairly simple so they could not be two hard to fix or at least use the parts from both to make one. Anyway for a couple of hundred bucks it's worth a try.
I know that these units a very basic and don't have any bells and whistles and have some underlying "fualts" which many have improved on in the forum. So this was my plan:
1. Get a least one welder working as standard
2. Do the wirefeed brace fix
3. Do the steel liner fix
Now to address the poor duty cycle and lack of control:
4. Add a wirefeed transformer and PWM speed control - I have a 24V transformer laying around and a PWM controller can be had for AU$18 from Oatley Electronics
Now this is where my thinking needs some input from the forum.
5. Would adding the second transformer and bridge from the second welder in parallel with the first increase the available welding current and / or increase the duty cycle?
And just for the fun of it how about adding an SCR control to the primary side of the two transformers to adjust the welding voltage rather than using the 2 transformer tappings. Mike W on the hobartwedling forum posted his circuit that he used on his tig.
Am I just plain bonkers?
Scott