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General Mach Discussion / Re: Bad precision with arcs
« on: May 25, 2013, 01:18:59 PM »
I found the solution.
it was simple... tool deflection. Sorry guys.
With arcs or circle the force vector on drill of milling deflection can vary due to different direction.. and desired shapes aren't recoverable by finishing pass sometimes.
Since straight movement is less affected (parallel force vector) and I didn't thought it could be that magnitude, I couldn't find where was the catch.
Well, with lower step depth and lower feedrate, second pass are near 30 microns ! Incredible...
Thank you anyway,
David
it was simple... tool deflection. Sorry guys.
With arcs or circle the force vector on drill of milling deflection can vary due to different direction.. and desired shapes aren't recoverable by finishing pass sometimes.
Since straight movement is less affected (parallel force vector) and I didn't thought it could be that magnitude, I couldn't find where was the catch.
Well, with lower step depth and lower feedrate, second pass are near 30 microns ! Incredible...
Thank you anyway,
David