Is there any interest in creating a feeds and speeds test topic? There’s probably some use in using a standard test set but this comes up so often and could serve as a limits of possibilities for all the various forms of our LR2’s.
I finally did just this myself for my on own LR2 v2. It’s a 48" x 30" top, with the gantry running across the 48" length.
After early crashes and failed things I’ve settled into a conservative but nearly 100% success rate feed and speed of 8mm/sec 4mm doc, for both 1/8" and 1/4" bits. I do full depth finishing passes at 10mm/ sec.
So here is where the testing comes in. Brave pants on. Shop grade 1/2" spf plywood as the victim, full face shield and safety glasses on . Dewalt 611 run at 11! (just kidding but it was max speed), 1/8" carbide single flute upcut bit of Amazonian quality.
Test 1 try more depth and slightly faster fed rates. 10mm/sec feeds, 20mm/sec finishing passes at full depth.
Quite impressed with the quick finish pass, and nothing broken, 8mm doc even came off in good shape. I was expecting danger, none found.
Test 2, definitely break things time. Increasing feedrates all the way up to fswizard craziness. Double check face shield is down.
Things got a bit funky in the pockets but still amazingly no crash and burn. Oddly on my control #4 I distinctly noticed the most burning smell of all of them, and they all performed pretty well. Dimensions were not all that different looking at a ruler, calipers will confirm.
All the pockets had a bit of this
This was the fswizard run, and was the worst, surprisingly none were perfect and all had this slight rounding on the NE corner.
The circles all had some consistent bite into them where the cutting started on each pass.
Again this is fswizard showing it the most.
The pocket bottoms were all really good across both tests. Squares circles are 40mm.
Takeaway for me are that I can definitely cut deeper and a bit faster with no real loss in current cut quality. I can also safely speed up the feed on my already full depth finishing passes.