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General Mach Discussion / Help with Offsets

« on: June 10, 2008, 12:22:22 PM »

Hey so I am fairly new to Mach 3 and am using the program to create a machine that rotates a bracket in 2 dimensions while applying a gasket to the outer edge.  Basically, the a axis is set as rotational and linear movement is in the x axis.  The b axis is set up to feed the gasket out as the bracket rotates.  The problem I am having is that with each run of the cycle, the b axis is accumulating some sort of offset, and when it passes 360 degrees, the offset rolls back around to begin the 360 count.  This is bad because it causes the B motor to wastefully feed material as it trys to reset itself.  My question is, is there any way to set up the b axis so it will feed a set length of material for infinite runs without having to reset itself.  To rephrase, is there any sort of G code i can use to make this b axis forget that it just moved a set number of units?

Thanks
Danny a