Oops, I fat fingured there. The G53.1 is indeed on its own line.

Yeah, thats what I hear. And this may be a machine problem. Wondering if a parameter is possibly off. I also may not have explained the issue well enough. At A0. the part is getting thinner, as if the Z axis is growing from heat. If we were not probing the next part, this would make sense. When it swings to A-90 our established face is off the amount of growth we have in the spindle, which would in turn throw our Y off after rotation. But we are probing for a new Z each part, so any difference should be picked up and adjusted each time. The way it is now we lose about .0004 each part, like clockwork, so that the dimension on the 8th part is about .003 different from the first. we have ran this cycle through backwards, meaning pallet 8 to 1. We have tried a half hour dwell between cycles, and each time we can compare the first part ran of the eight, to the first of the next cycle, or the third to the third and so on, and they are almost identical.

New to 5th axis work in general. We have a machine (Matsuura MX-330) that was bought specifically for one job to be ran lights out, with prep work being done during the day. We want to be able to run eight of these parts unattended. This machine has an A and a C axis. Job was programmed using Mastercam and Camplete. We are trying to use the tilted work plane function (G68.2) to mill the majority of the part at A0, then rotate to A-90, and mill different features at C0, 90, 180, and 270. We are using a probe macro to pick up the X,Y, and Z on every part. At A0. we are milling the first side and outside profile mostly complete, including our Z zero for all programming and our primary Datum. X0Y0 is the Center of the part. When we were just running one part proving out the program and process, I thought I noticed a little variation here and there, but mostly chalked it up to not having the most rigid setup, and working out speeds and feeds. When we got to the point of our first test run of what would happen overnight we realized we had a problem. When we rotate to A-90, and mill features that relate to the face of the part(Y0 at A-90, Z0 at A0) our dimensions are getting smaller through the eight part run. For example, we mill a feature in the X axis parallel to the face of the part. the dimension from this feature to the face of the part shrinks approximately .0004 per part. We have a few other ways to verify this happening, but we dont know why. It seems like we are incrementally losing some of the positioning from the G68.2 Function. Here is a sample of the beginning of a tool at A-90. T14M06 M08 G49G00G53Z0.0 G131P2(HIGH SPEED CONTOURING ON) M132(A+C UNLOCK) G00G90G54A-90.C90.S16500M3 G54.4P1 G68.2X0.Y0.Z0.I90.J-90.K0. G53.1X-2.9Y1.05 M131(LOCK) G43Z4.H#517 Does this look ok? Any ideas as to what might be going on? forgive me if this is not clear enough. I can add any more necessary details if needed. Thanks!