Steppers and open loops are only as good as the code too. I often run the same codes many times. It's only after it has run a time or two that I leave it unattended. Very seldom do I leave the shop though and then only for a couple minutes.
If I was running a larger machine that would be damaged if it crashed hard or even a lathe, I would feel better with a closed loop system. I too am keeping an eye on the Brains.
Cool stuff.
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Lee |