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Thanks for the suggestions, endmill flex is the problem.
Or to be precise a extremely dull endmill. With a sharp fresh endmill dimensions are ok, even with slighly increased feeds!
- got no time...

Hello!

I see, you do not trust my ability to read Gcode...
It does a 0.3mm diameter helix.
Here is the code for the boring operation:

(BORE2)
G0 X0.075 Y7.675
Z15.
Z-1.3

Hello!

Thanks for the suggestions, worked on some:
Cutter runout is 0.02mm at flute tip, acceptable for chinesium.
When i go for a straight plunge it leaves a 3mm hole, it is a 3mm Cutter- ok....

Every part has outside Dimensions. Most of them have holes in them wich do not have outside dimensions.

Hi there, Ive got a problem that has possibly been discussed a 1000 times, but i have no idea what to search for.

My name is Thomas, i have some experience with CAD/ CAM, CNC etc but this is the...