LASER feed speed

[hbruns]

I just set up my LASER module and am experimenting with feed speeds, and I'll be posting my experiences here.

The tool I added & used is right out of the AXIOM directions:
End Mill with a 0.012" diameter.
Pass depth of 0.001"
75% step-over (0.009").
I initially set the plunge rate to 0.001" per minute, which is a huge mistake! If you do this, you'll learn why your estimated times take forever.
After installing, I got an error every time I tried to set the HOME coordinates. Pressing MENU+0 (both at the same time) reset the machine to the proper mode.

My 1st trial run on Baltic Birch and 100 ipm went well, mostly. I set up the toolpath as a quick engrave with no cross-hatch. 
Some small letters cut too deep, so I will try 200 ipm with a cross-hatch next.

[johnb]

So...what plunge rate DID you end up using?
Any thoughts on adjusting the stepover?

[hbruns]

Feb 21, 2019 15:03:21 GMT -5 johnb said:

So...what plunge rate DID you end up using?
Any thoughts on adjusting the stepover?

Plunge rate set to 100 ipm. 
Problem solved!
 - don’t set it that fast on rotating tools. A fast plunge rate does not matter for the LASER.

stepover - have not changed it. Have not felt the need. 

200 ipm with a crosshatch did not solve the issue of cutting too deep on small letters. 
Instead, I outlined the letters vs. filling them. 

Crosshatch (or fill) on small things cannot take advantage of a faster feed rate.
The same applies to “smooth” lines that are not actually smooth.... the spindle movement follows the path with tiny zig-zag movements which do not allow the spindle to reach speed.
I need to see if VCarve has an option to smooth lines. For instance, lines (Vectors) that are drawn around imported images. 

[gerry]

You don't need to set the Z to 200 ipm. Set the Vcarve/Material Setup/Rapid Z Gap to Clearance 0.001 inches and Plunge to 0.001 inches. The Z will stay in place through the entire burn after the initial Z drop.