Consistently blowing holes in sheet metal and would like some advice for how to avoid it
Hi and welcome to the forum.
Bit more info needed and pictures would help.
What welder, wire, settings, gas or gas-less, if gas what type, how thick is the panel, what position - on the flat, vertical or upside down?
At a guess I'd say NA MX-5 sills. Again.
Welcome to the Forum.
Search for MX 5 and you will find several threads on replacing sills.
Read the MIG guides and practice the thin metal technique before tackling the car.
Ensure you have cut away all the corroded metal. Welding to thinned panels is not really viable.
Here is the patch panel I am currently trying to weld in, however it's blowing apart, welder is a Kramer 200 bi pulse MIG welder, gas is sureshield 5, 0.6mm copper coated wire. Did some practice pieces off to the side which worked fine however as soon as I go over to the real patch it just blows through
Do a series of tacks, overlapping, hot on hot, one after another, rather than trying to do a bead.
Make sure you have good ground clean bare metal before you start too.
Is there a rough setting interns of current and voltage that I should be welding at?
This is what I am currently welding at
Voltage looks low, i'd expect to be around 16-17v
Will try that out on another piece to test out
60A!! No wonder you’re blowing holes.
You need to be running at 30 or so, even lower if you can.
Looks like a multi inverter machine so the amps, i guess, should only relate to the other uses. Volts should be for mig.
Going on assumption you are using 0.8/1mm steel to plate
Yes the amps is the wire speed adjustment, and it's 0.8mm sheet yes
When I have thin metal I start off by have the welder set a little lower than the test piece setting. Then I do a series of 1 or two second tack welds spread along the join.
Do a few spots like this and let it cool.
Grind these small round welds flatter
Then set the welder back to your preferred practice setting
Starting at one of the tack welds to give you a good starting point do a one or two second weld. Then stop.
Pick a different tack and do the same again. Let it cool
You can then return to the first weld and so on.
Say trigger on trigger off as you go.
It's like doing lots tacks.
You can grind it down as you go as well
What is a good ball park setting of amp and wire speed for 1mm steel plate using 0.8mm flux wire?
Chrisfix went very in depth in this.
If i remember from the video he showed the diagram for wire speed and volts to thickness. Just skip to the part where he sets the welder up.
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