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I have a 90 amp fluxcore welder and i was wondering if i could use it as a MIG welder if i swap out the wire for MIG wire and retrofit a gas line to the gun. I found this picture that is exactly what i had it mind. he uses some DOM tubing as a collet. he uses c02 with that setup and he didnt state if it worked. I plan on using argon if i do this mod. I also read that if i were to convert into MIG that i would need to switch the polarity. How is this done? my machine only has a power switch and wire speed dial. none of the wires disconnect from the machine.
Reply:If you have a HF 90 amp it has AC output.It switches polarity 60 times per second.These welders have quite a few missing parts that you need in a gas welder.No rectifier,no capacitors,no reactor coil,no gas regulator.The gas line will be in the way and I expect the heat will melt the gas tubing.Even with all the changes you still have a weak machine with little control over amperage and wire speed.Put your money into a good mig welder,forget the HF 90.I still wonder why anybody buys these gutless wonders in the first place.I bought a used Miller 130 for 300 bucks.Several spools of wire, a leather jacket.and hand tools came with it.The Miller weighs in at 65 pounds.Put your HF 90 on the scales and post back.
Reply:You might be better off upgrading but I know some people like to modify or experiment so if you are planning to go forward with this project, I have a harbor freight mig gun off a mig 170 I can sell you which has the built in line, gas valve and trigger wires that can be easily connected to a 90 amp flux wire welder. No need for any mods to the nozzle like the picture you provided and if you have a harbor freight model then it will have AC instead of DC, No idea how mig with ac works on steel but I have seen mig AC aluminum welding and it looked very nice especially on thin aluminum. I doubt anyone here has ever tried AC mig on steel but I am sure everyone will tell you that it won't work because it has to be on DC despite never trying it but hey you just might find a new process ? I am curious..... Since I have no experience with AC mig on steel I can only guess that it will weld thin material no problem but might lack penetration on thicker stuff since AC is very harsh and a lot of the material is lost as spatter than deposited like AC flux core welding. I know it sounds like I am contradicting myself but then again its only a guess so remember that ! You might also want to try argon co2 argon mixes along side with your argon, straight co2 might just make it bite more ? Good luck and hit me up if interested in the mig gunAttachment 1039011Last edited by NinjaRay; 03-14-2015 at 08:47 AM.
Reply:Is there any way of switching the polarity of my welder?
Reply:If your welder has AC output it changes polarity 60 times per second.You cant change it.
Reply:To be completely blunt, it's not worth even considering. It won't work. |
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发表于 2021-8-31 22:41:17