Plunging and ramping speeds

[Ger21]

With really small tools (<= 1/16"), ramping slower can actually cause them to break, as the cutting force goes from very light to very high as soon as the ramp ends, and the feedrate goes up. Ramping at full feedrate gives a gradual "ramp up" of cutting forces.

With larger tools, this isn't an issue, and ramping is mainly just to avoid plunging. If your ramp is very short, then you want to go a bit slower. The longer the ramp, the better, if you have the room, and it's not so long that your increasing cut times. With our Morbidelli, I keep AlphCAM set up to make the ramps 5x the tool diameter.