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W-axis angular function suggestions
#3
Thanks, Yuriy

The basic gist of my idea uses that hollow-shaft rotary encoder I asked about last week. I'm going to make an adapter that fits it to the crank handle shaft of my rotary table. The 90:1 reduction of the table, combined with the 3600ppr encoder, should give me single arc-second resolution (360° / ((3600ppr * 4) * 90) = 0.0002777° = 1 arc-second). Using the encoder on the crank handle (rather than driving it by the table directly) makes backlash a concern, and I'm going to use a keyed 1-way bearing (sprag clutch) to mitigate that by preventing me from turning the handle backwards.

I'll definitely post up when I've finished the build.
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RE: W-axis angular function suggestions - by MidniteMachinist - 07-22-2020, 07:58 PM

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