Friday, February 01, 2008


First measurements

I bought a foot of 10-24 threaded steel rod and a coupling nut and attached it to the stepper with a makeshift duct tape coupling. I used a coupling nut as a thrust collar.

Initial measurements indicate that with a 5 msec delay I can achieve 7.6 mm/sec translation speed and with a 2 msec delay a 15.1 mm/sec translation speed. The stepper motor seems to be able to apply a respectable amount of force at those speeds.

For purposes of comparison a #10 thread is approximately 3/16th inch in diameter and just a bit over 4.8 mm. The pitch in metric usage is 25.4/24 or about 1.06 mm.

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