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My oxygen finally came in.. a few days late... Can I cut a hole with a diameter of .126" in a piece of mild steel .25" thick?

Ok, thanks. Hopefully that will give a better description of the head, and what the numbers represent - higher number = lower focus, 1 tick = 1mm etc. because my manual is 15 years old and was translated from some European language

To set the focus position I put a small cardboard shipping tag on the table, turned the focus all the way up till it topped out then brought it to 0. Then I brought my head down and took a pulse shots increasing the focus number (lowering the focus) by 15 every time. The pulse size decreased...

The blobs are inconsistent. Sometimes a hole has it sometimes not without a change in parameters. Check out the updated pictures from the link in my first post

lead in - rad .1875, length .200 focus is at 6mm I have played with the acceleration / braking factor - not much has changed, I tried a straight lead in and the blobs are much smaller but still present.

I am cutting 11gauge ss on a bytronic bystar 4020, 2800watt. I'm having some difficulty with holes and tight slots, I end up with small hard blobs of steel at the pierce / leadout points I have an arc leadin and leadout with plenty of length. I also end up with the blobs in corners (with rad...

I ordered some oxygen and low pressure nozzles. They will be here this afternoon, so I wont be mucking about with nitrogen. I have some base parameters to run oxygen so I'll let you know if I have any success.

I am fairly new to lasers. I've been cutting for about two months on a bystronic bystar 4020, mostly Stainless 20gauge - 11gauge, Now I've got some parts to cut out of 1/4" hot rolled. Because I cut mainly stainless I am running nitrogen. I've got a 7.5 Head on the unit and I've figured out how...