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General Mach Discussion / Re: Opinion and advice - explain relationship of encoder to kernel speed
« on: April 10, 2009, 05:17:46 PM »
Timing belt drive with idler, so no backlash, but i can see the idea needs more thinking through.
A 200 line sensor puts out 800 pulses . . interesting . . quadrature? The formula seems pretty straightforward, thanks!
Putting a sensor on the axis is not practical, but I could either use an encoder with less steps . . say 50, and put the encoder on the motor, or run off a larger idler and gear down to the encoder. I have seen huge machine tools that wof that way with the encoder driven off the lead screws with tiny timing belts.
From the speculative responses so far, I take it that a servo driven 4th axis/pseudo lathe is not common?
A 200 line sensor puts out 800 pulses . . interesting . . quadrature? The formula seems pretty straightforward, thanks!
Putting a sensor on the axis is not practical, but I could either use an encoder with less steps . . say 50, and put the encoder on the motor, or run off a larger idler and gear down to the encoder. I have seen huge machine tools that wof that way with the encoder driven off the lead screws with tiny timing belts.
From the speculative responses so far, I take it that a servo driven 4th axis/pseudo lathe is not common?