I have a NC milling machine FANUC with FANUC 3M control (rom version D71-04). I have a problem when milling sharp corners. The corners are not sharp or edged but are rounded instead. The machine already continues with the movements of the commands from the next line before it has reached the 100% exact accuracy of the before. Withe the increased speed the deformation is also increased.
I usually work with the axis movements F1000 to F7000 (1M/min to 7M/min). I checked the mechanical guides with a micrometer and the deviation is within tolerances 0.05mm.
With smaller programs I solve the problem by adding a mark "*" (EOB) for a blank line at the end of the command line (command block). With this the axis movements stop at the end of the command for a fraction of a second and this way the movements are exact on coordinats as they should be and only then the movements go on to the next line. But this way I am wasting a lot of time and the memory which is already small.
I would really like to know if this "defect" or imperfection can be removed somehow with the modify of parameters (which and to what value) or if there is some other way. By the way, the deformation results in all 3 axis.
I will appreciate any help.
Regards,
Renato