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« on: May 02, 2011, 09:02:54 AM »
Fastest, the variance I saw was a factor of 10 less, it was 0.005mm and I put that more down to the wear on the bridgeport than the actual switches.
As for distance, well I would think as long as you were far enough away that the motor could get to its homing speed then it should not make a difference how far away you were from the home switch as it would be at its max velocity. Obviously that distance would be determined by the accel in motor tuning and steppers are by their nature slow, I think at the time my accel was 40mm/s/s but reducing the max vel in motor tuning from 2500 to I think 2300 allowed me to get the Accel up to 120mm/s/s. That was a vast improvement and speeded up maching time significantly as the small decrease in Vel was well offset by the increase in Accel.
That is why I love servos, even on my heavy lathe I can get 800mm/s/s accel and it is just so nice not to be able to see an axis accel/decell although at first it was a bit scary being used to steppers.
Hood