Thanks Ryan, I will give it a try.
Hi.
I tried different depths. At 10 mm new very sharp bit worked fine. Hovever a bit quickly loses a little of sharpness (but stays sharp enough to work yet). In such state 10mm (6mm flat end bit) is too much - it can suck into material and force MPCNC to skip steps.
What I found ok is 1.25D with 30% stepover, 9K RPM, 2000 mm/min feed rate (62.5 RPM on NEMA17). This way the work is stable and quality is acceptable.
I’m pretty new to all this stuff, but you’ll see ahead before the bit is giving completely up.
I took it pretty much to the edge this afternoon, had to change the bit on my last part for the MP3DP.
The one I used is a dirt cheap 1/8" bit from Aliexpress, for ~12$ / 10 pcs.
The time I ordered them I didn’t know that it would be better to use a single flute, furthermore the usable length was 12mm, as the multiplex was 12mm as well, I decided to go in 2 passes.
On the picture you can see quite clearly where I changed the bit, the sawdust turns a lot darker on the last hour of the bit too, so that should clearly tell you when it’s time to change.
