I’ve recently picked up a new mig only to learn how clueless I am with the process…
I’ve been tig and stick welding for a number of years (although it must be said not as a professional) but I understand these processes and even if I’m not world class I certainly know the difference between a good weld and bad one. Mig however I find is shrouded in a little mystery. Dip transfer, globular, spray I admit I only learnt there were different ways of laying metal very recently and previously believed it’s was just mig… anyway I’ve been studying and I’ve had a proper go with the welder this aft so feedback required please.
Welder is an abused tecarc 251, using an mb35 torch, 1mm er70s6 with the last dregs in a bottle of 5% co2 flowing around 11-12lpm. I will be swapping to 10% co2 in the coming days.
First couple were dialing the machine in after laying beads on some scrap. Material is 6mm presumably s275, nothing special.
Reverse side seemed to go in a little better after tweaking voltage and wire speed
From my little understanding I believe this was globular transfer which should yield good penetration but the low percentage of co2 would be preventing spray transfer?? It didn’t appear to be short arc when I watched the puddle, it looked like larger drops were forming. I will be doing a cut and etch when I have some time to properly clean the material and dial the machine with the new gas. However it looks like I got adequate gas coverage and the pool wasn’t out of control while welding.
I did find it difficult to lay nice beads on thinner material but I doubt I’m making it easy with the wire diameter and size of torch… I’m planning on getting an mb25 and some 0.8mm wire which should improve things?
I took a short video so you can hear and (nearly) see what’s happening.
Feedback highly appreciated
I’ve been tig and stick welding for a number of years (although it must be said not as a professional) but I understand these processes and even if I’m not world class I certainly know the difference between a good weld and bad one. Mig however I find is shrouded in a little mystery. Dip transfer, globular, spray I admit I only learnt there were different ways of laying metal very recently and previously believed it’s was just mig… anyway I’ve been studying and I’ve had a proper go with the welder this aft so feedback required please.
Welder is an abused tecarc 251, using an mb35 torch, 1mm er70s6 with the last dregs in a bottle of 5% co2 flowing around 11-12lpm. I will be swapping to 10% co2 in the coming days.
First couple were dialing the machine in after laying beads on some scrap. Material is 6mm presumably s275, nothing special.
Reverse side seemed to go in a little better after tweaking voltage and wire speed
From my little understanding I believe this was globular transfer which should yield good penetration but the low percentage of co2 would be preventing spray transfer?? It didn’t appear to be short arc when I watched the puddle, it looked like larger drops were forming. I will be doing a cut and etch when I have some time to properly clean the material and dial the machine with the new gas. However it looks like I got adequate gas coverage and the pool wasn’t out of control while welding.
I did find it difficult to lay nice beads on thinner material but I doubt I’m making it easy with the wire diameter and size of torch… I’m planning on getting an mb25 and some 0.8mm wire which should improve things?
I took a short video so you can hear and (nearly) see what’s happening.
Feedback highly appreciated