I’ve been speed testing the LR3 and it appears that all linear moves the LR3 can achieve 20,000+ mm/min. At 30kmm/min steps are lost. However, when completing an arc the LR3 seems to have trouble after 6000mm/min. Significant trouble begins at 10,000mm/min.
Planning to try implementing crazy cutting feed rates, but I’ve never tested travel speeds. Are arcs an issue at higher feed rates?
Arcs are more math intensive. You will have less slowdown on faster (32-bit) boards vs. 8-bit boards. Control boards with hardware math support, like the SKR Pro, will have less slowdown. Most CAM software has a setting to turn curves/arcs off and instead approximate the curve with short lines.