00004", which is under the rounding tolerance of the CAD system output at. The error tolerance parameter was set to. 00001") but the CAD program I used was old and only calculates out to 4 decimal places and does use I and J for arc centers.
The machine is setup to read to 5 decimal places in inch mode (10 millionths =. I had a similar situation happen to me recently on our new Sodick Wire EDM. I believe there is a parameter *somewhere* in the Fanuc control to adjust the error allowance for calculated arcs and such. he used G1 for lead in and lead out to the circle instead of CW and CCW connecting arcs I cannot get copy of program with the problem as it has already been changed by the programmer and the part was machined and done already. problem is on a final finish cut holding a dimension that might mean tool comp has to be a certain size and cannot be adjusted we actually got program hardcopies with notes like if program stops in error adjust tool radius comp +.001 and then it usually works. I believe the error is less likely to happen if circle is programmed in 4 arc moves (quandrants) instead of 1 gcode for a complete circle. 0001" even though CAD program says coordinates are correct i have seen this problem on other cnc machines from other manufacturers where it would only work if a coordinates was changed. Programmer has seen this problem before and usually just uses G1 for lead in and lead out moves to machining a circle avoiding lead in and lead out arc movesĬRC error i believe is Cutter Radius Compensation and is is doing the math on the offset coordinates and is off. 0005" it often will work and the comp is small and the arc radius much bigger so it is not like the arc radius is too small we know it is a control problem as often adjusting tool comp.
The old fanuc 15 control does not like connecting CW and then CCW arcs. We do use I,J,K and wear comp so the tool radius comp is often small like only -.001
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