Michael Haberler wrote: > in following the venerable tradition "if everything else fails, look how > Fanuc does it": > My Allen-Bradley 7320 (a 1978-vintage control, 16-bit minicomputer) had a jog retract function. You could interrupt a move in the middle of the move by pressing cycle stop, then jog retract, and then move only ONE axis arbitrarily. Then, when you hit cycle start, it would reverse that jog move to the original position before resuming the interrupted move. It would also allow you to skip forward or backward a block at a time on the paper tape to get to a good block to restart from at any point in the program. You needed to watch out for modal G1, G2, G3 and tool length/radius compensation or you'd get errors.
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