Hii, i am using Mastercam X8 lathe with c axis. Machine name: Gildemeister ctx 800 (Sinumeric 840D ) machine If we create a c axis face contour in Mastercam lathe and when we run that program in machine means. C axis will jerk as a result chattering mark has formed in the job. We have tried to fine-tune the machine but no use N120 G71 G40 G18 G90 N122 G54 N124 T8 N126 TC(1) N128 G17 M814 N130 G94 N132 L707 N134 SETMS(1) N136 DIAMON N138 G26 S4= 4000 N140 G0 C4=DC(129.806) N142 G0 Z5 N144 G0 X78.102 N146 G97 S1=1909 M1=3 N148 X78.102 C4=DC(129.806) N150 Z2 C4=DC(129.806) N152 G1 Z-5 C4=DC(129.806) F190.9 N154 X75.879 C4=DC(127.746) F381.8 N156 X73.789 C4=DC(125.597) N158 X71.835 C4=DC(123.358) N160 X70.019 C4=DC(121.029) N162 X68.346 C4=DC(118.612) N164 X66.818 C4=DC(116.108) N166 X65.438 C4=DC(113.522) N168 X64.208 C4=DC(110.859) N170 X63.132 C4=DC(108.123) N172 X62.211 C4=DC(105.323) N174 X61.449 C4=DC(102.466) N176 X60.846 C4=DC(99.563) N178 X60.403 C4=DC(96.624) N180 X60.123 C4=DC(93.66) N182 X60.004 C4=DC(90.683) N184 X60.048 C4=DC(87.705) Here c axis and x axis values are appeared with certain tolerances Is It possible to make the outputs with circular interpolation and linear interpolation like 2d contour mill ( machine don’t have y axis ) Please give the solution to solve this problem