Re: [CAD_CAM_EDM_DRO] Re: Bridgeport retrofit servo questions 1:1 ratio

braidmeister <braidmeister@...> wrote:


No I was the one throwing planes!!

Yes, that's the motor in question. It seems to me that it would be an
ideal fit for the BP. I am hoping that I can get away with 1:1 and a
decent encoder.

/// Trying to run a 3100 rpm servo 1:1 to a 5 tpi ballscrew will produce rapids of 620 ipm. One needs from 2:1 to 3:1 reduction on all 3 axies using servos (driving the knee, its half the increment of X and Y per rev.). Simply increasing encoder count to attain resolution is not practical. An E5S-200 encoder, Gecko 320's and Mach2 work perfectly together using the above ratios. 1:1 ratio is like driving a car around in 4th gear. Servos operate best at 80% of their rated RPM. I just ordered a set of pullies from mcmaster carr three L (.375 pitch)series 30 tooth (3.5" dia) and three L series 12 tooth ( 1.4" dia) for a 2.5:1 setup/// Ron



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