Setting up cleaning passes on engrave mode cuts, fiber

[BaronPork (Ignas K)]

Hi people.

Playing with engrave cutting 1mm stainless.

I know how to setup cleaning passes in 3d sliced mode, but what about for general engraving cut ?

I want to clean the cut, say, every 10 passes of engraving cut. Cutting is done in about 100 passes and it slags up pretty badly and warps to heck.

Also, any way to insert a timed pause between passes to let metal cool off a bit ?

Anyone who cut stainless, what are your settings ?

Currently my settings are 450mmps 95%pwr 55khz 200q 0.003lpi
It engraved lettering all the way through in about 110 passes, but outside cut (2mm trench around) warped the heck out of the lot by pass 70.

Dont really want to use wobble, engrave cut works very well with brass…

[Aaron.F (Aaron)]

@BaronPork

Dont really want to use wobble,

Why not? You need a gap for the beam to get in there.
It never occurred to me to use Fill Mode for cutting. Is that what you are doing?

This is what I’m using to cut 0.75mm stainless on a 30W fiber:

• You might need less than 500 passes
• low frequency for high power output
• Rather fast speed
• Big Wobble steps
• Kerf offset to compensate the Wobble.

You can add a “Pause Before” value under “Show Timings”, but I didn’t need that if you have a blower fan transporting away the heat

[BaronPork (Ignas K)]

As for wobble, i was speaking to several much more experienced people and all of them run cuts in fill mode, as apparently you get much better edge quality. I’m yet to try wobble.

I did manage to cut that stainless out, letters engraved out fine but had to nurse the cut as it was just folding over with heat. Its very low power engrave or i need to figure out something else in regards to 1-1.2mm stainless as at the moment i cannot cut it reliably without massive deformation or insane cut times. I’m pretty sure its just my ignorance of the topic and lack of testing, which i will do coming weekend. Any advice on cutting stainless is appreciated. I think i got the brass fill cutting down more or less…

Pic below, it engraved fine, but upon cutting out perimeter it warped material between letters so now its wavy and i’d need a press to fix it…

[parsec (FerAS)]

Before cutting try putting the stainless steel in the freezer or or some ice under during the cut.
Just an idea.

[jkwilborn (Jack Wilborn)]

I don’t know if this could be an issue or not. It might not be doing what you expect. I noticed your frequency/q-pulse is below the threshold.

This is from an 80/100W JPT M7 MOPA manual.

Not knowing exactly or even in the ballpark of the technology, it seems upside down.