Cut stopping straight away

Just purchased a unimig viper cut 30 mark 11, looks great but the arc/cut flame only lasts for a couple of seconds and drops out, have put in a new electrode, new tip, (even though we have only used it for 5 mins). It’s plugged directly into the 3hp compressor running at 90psi with about 1m of air hose, have ground the steel to give it a good earth, running it on 2t on standard.

1 Like

Air pressure needs to be maintained above 70 WHILE cutting.
A small compressor needs to be able to keep up.
Send us pictures of your setup so we can help you. Raw voltage? Or divided voltage? Laptop or desktop? Type of torch and where the consumables came from. Hopefully not Plasmadyne… etc
What error screens are popping up. Send us a screenshot of the warnings or error screen on FireControl.

1 Like

Unimig Viper plasma cutters are mostly sold in Australia not here in the US.

Air should be set on the regulator to 75psi. Also cutting tip must be with in a .060" or 1.6mm to the metal being cut.

2 Likes

Welcome to the forum. You sure gave a lot of information in three sentences. I would call that a good first post!

What table are you using? Does it have an active z-axis (does the torch move up and down with a stepper motor)?
The reason I ask, is that you can test your your cut height with this file if you have an active z-axis. That is what @mechanic416 is asking you to ascertain…and is a good thing to rule in or out as far as problems.
cut height test.tap (224 Bytes)

Can someone please explain how the cut height test tap file works? ! If I download that file, load it into fire control and do the test, if its wrong or right, where in fire control did I ever program my cut height ? ( thought this was in the fusion 360 software side) How is it verifying my settings that I have in the post processor in fusion 360?

Run the program and measure the height where the program stops. The only feasible option is to adjust you cut height in your cam settings. You can also just stop a cut and measure that will cause issues restarting possibly you would want to do that on a important piece.

2 Likes

Thanks Phil! Where is the tap file getting the information of where to stop ? If its programmed into that tap file how is it reading “my” settings? Tryin to figure out the logistics behind it

It doesn’t use your settings it tell the machine what to do. It has a height programed into the file. Whatever the difference between that programed and you actual height you will need to adjust your cam settings plus or minus.

So the file is approximately a 1/16 height if you measure say .080 you will need to subtract approximately .020 from whatever you use in cam.

3 Likes

understood! Thanks Phil

1 Like