[powerglider]

I've always been under the impression that computers don't make mistakes only the programmers do. But what happenned a few minutes ago just makes me wonder if it only happens to me.

I'm new to cnc machining, bought a used SuperMax milling machine with Anilam Crusader 2 controller. I was able to make my computer download programs through the rsc 232 port on my own. Everything looked rosy.

I've been successful at cutting so far in maybe 20-25 different toolpaths.

So today I load a program and run it, no problems for the first 8 pieces I cycle through. But on the 9th the Z axis starts heading south progressively on its' own! Cutting through my material (lucky for me the vise wasn't in the way or it would have ate it too!). Well there is no change in Z axis, only one line of code to lower it (third line) and then one line of code at the end to bring it back up before homing it to the start x=0, y=0 position.

I run the program again 5 times and can't reproduce the same effect (with no material).

SO have others had this happen to them? There have been no power variations I could account for, no other buttons were touched. The only thing I can think of is that I do have a few small magnets that I use to hold pieces of paper close to the servo motor and also close to the shielded control lines to the Z axis. COuld they possibly have set it off? They've always been there (except now I removed them).

Or is it just something else I must have done and the controller or servo couldn't have just acted on it's own?

Well, I don't know what to do now, I just ruined a pretty expensive piece of material.

Better go eat some jelly beans to relax...

Francesco