It sounds like you are not doing the tune right.first tune x,y+z axis use this program( m49 g1 g8 g90;x-5.y-5.z-5. f150.;x0y0z0;m99p2; ) the following error should be 595 for dc motors or 600 for ac motors.then tune the a+b axis seperately use this program (l100;m49;a360.g1 f2000;a-360.;m17;m30;l101.1) and tune to 680 following error.and then change a to b for b axis.start there,all should sync up when set.


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