Ok, I am going to try to explain what happened to the best of my abilities.
I have had Mach 3 installed on my router table for about 2 years now and absolutely love it. I have had no problems until now. I am milling some simple 1in x .068in slots in a piece of material (hundreds per plate). To do this I am ramping down at 3 degrees using a .063 endmill. I ran a few pieces yesterday and they turned out great (within about .002" on them all). Today I started the machine and computer back up and started making some more parts. What is happening is that the slots arent coming out a full 1" long (more like .970). I can see where the tool starts the ramp, but it just does not seem to complete the entire move and stops short. All the slots did come out consistent though.
I didnt change any settings or anything like that. The axis are all ball screws and linear ways which are all very smooth. The computer wasnt used between me running parts and isnt hooked up to the internet, so there were no wierd windows updates messing anything up.
I tried playing with some things to fix it and the only thing that helped a little bit was slowing the feed down to 30%. I just dont understand what happened. I have never had anything happen like this in the hundreds of hours I have been using the machine. Any help would be appreciated. Thanks!