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Author Topic: Rotary axis setup help  (Read 1882 times)

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Rotary axis setup help
« on: February 05, 2015, 03:39:35 PM »
I have read quite a few posts but am still stumped, I am setting up a rotary axis on my router table but do not have the steps quite right I believe.      I have a g203 with 10 microsteps and a harmonic drive rotary with 50-1 reduction. The numbers I came up with is 222.222  and .0036  The first one makes it turn fairly smooth however sometimes when I am jogging it goes the wrong direction,  the second number .0036 just makes it growl.  Also when the axis indicator rotates once the chuck rotates about 5 times.



http://www.ebay.com/itm/291270426575?_trksid=p2055119.m1438.l2649&ssPageName=STRK%3AMEBIDX%3AIT          Ebay 4th axis

Chuck type: K11 100mm three jaw centering chuck
Center height: 65mm
Total height: 115mm
Angle: 0.036°/ step  (0.018°/ step for 100:1 )
Gear box output shaft diameter: 25mm
Reducing ratio: 50:1 (or 100:1 )
Stepper motor: Nema23 57mm 3A 2-phase 4 wire

Re: Rotary axis setup help
« Reply #1 on: February 05, 2015, 06:34:56 PM »
200 x 10 x 50 = 100,000 / 360 = 277.7777 steps per degree.
The other # is degrees per step ... which Mach does not use.
Re: Rotary axis setup help
« Reply #2 on: February 05, 2015, 06:35:58 PM »
or if its 100:1
555.55555
Re: Rotary axis setup help
« Reply #3 on: February 06, 2015, 05:55:20 PM »
I have put in 277.7777 in the steps box,  sometimes it will spin but will not always turn the right direction, the rest of the time it will just growl and jerk back and forth, I have my acceleration at 15 and velocity I have been trying different numbers faster seems to work better but not properly.

Thanks for your help so far!
Re: Rotary axis setup help
« Reply #4 on: February 08, 2015, 06:23:47 PM »
Never mind, figured it out myself, My stepper has a nonstandard wiring pattern, have is running now :)