I am using Master cam to program profiles on a Fanuc controller. I have a Y axis on the left spindle but not on the right. I cannot cut the square profile on the outside of the part on the right side though because it is off center of the bore. I am boring, face drilling, cross drilling and pocketing on the left side and handing off to the right to locate on the bore. The outside profile is rectangular with a couple of radii on it and is off center. MCam programs using x and c in steps all the way around and leaves the surface finish choppy. Will using the 12.1 polar interpolation help with the surface finish. I sure know it will help with the length of the program. I don't have enough room in the controll to even deburr the outside right now.
Dave's comparison confirms what is a most logical conclusion. When using Polar Coordinate Interpolation, the control system calculates a trajectory the same as it does for any other synchronized move. Accordingly, there will only be one acceleration/deceleration phase per move command in G12.1 as opposed to the many when the profile is generated via many small moves. See the Thread in this forum titled "C-Axis Post help" to see a comparison of program size between Polar Interpolation, and the profile generated using small X-C moves.
Ok is for the precision , Fanuc is famous for chopping.... but it have reason, for the precision a cnc contro may DO a deceleration aT the end of a g code block, istead if you are doing a 3d parT you need to start a g08 or g5 for smoother the movement.
But we are talchink of lathe then on 0ITC usually the producer put on Mcode to actiivate g62 G64 is not a solution but he can smothing .
CHECK PLC SIGNAL G053 BIT6 TO FIND RIGHT M CODE