I just read this and have two words
Following error
I encountered this on a high speed Cincy 5axis 25k rpm diamond cutter on graphite billet master mold. Since this part was symmetrical, and two parts were back-to-back. I programmed one quadrant, cut one quadrant, 100IPM. Walked away, let the experienced operator finish the cutting. The inspection report rejected the three other quadrants. So I went to query the operator. "yeah, it was cutting so good that I jacked up the feed rate to 400IPM and ran it" (rapid is 1200IPM)
Well, that mass of cast iron (Cincy bridge-type machine) could not accelerate to keep up with the commands and lagged (followed) the point to point data commands
The feedback servos reported no error. it showed up in the part. This was 15yrs ago, I suspect machine controls are better, faster now. Is there still that following error?
"can't inspect quality into an existing part"
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Been doing this too long |