Round Corners

Hello together

im facing since lately this issue:


instead of going into the edge, the machine makes a round corner.

i have read about putting G64 PX in the beginning and it works.

BUT! it insanely slows down!

is there another way to get a better result?

thx for your help

The reason the machine is slowing down is because at a corner one axis must decelerate to a stop and the other must accelerate from stopped to the feed rate, but at the point there will be an instant of full stopped.

The G64 Pn setting sets a tolerance to how close the movement must come to the programmed path. G64 with no P tolerance is infinite blending and the corners will be rounded to their maximum for the machines acceleration settings.

It is simple physics and geometry you can't make a square corner without stopping. If you round the corner you can go faster, and the faster you can accelerate the less rounded the corner must be to maintain a certain speed around it.

You have to work out a compromise to determine what G64Pn setting will give you the fastest possible speed, yet still maintain an acceptable tolerance for your work. The larger Pn is the faster and more rounded the machine can go around the corners, if Pn is smaller the rounding will be less, but it will take more time.

G64Pn where n=the minimum resolution of the machine (such as 0.0001inches), might be a good setting for extremely precise work. 50-100 times that is usually a pretty good compromise that usually won't make noticeable deviations on a machine like a wood router.