I haven't done any actual cutting but I have 330's @ 50V/15A and I dropped my rapids down to what you're running while I was setting up the X. I'm taking it slow sorry I can't give real data. I can't physically make the axis loose steps at 50ipm with any force my body can exert. I hope to get all my limits and Y preload taken care of in the next month and then can actually make the chips fly.
Interested to hear what others are running. I'm already considering stepping up (pun intended) to 400+...
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