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##### General Mach Discussion / Ratary axix, works in Mach2 but wont in Mach3
« on: November 05, 2006, 11:40:17 PM »
Hello everyone.
I have this problem with my setup, I have a half step bipolar driver board (pminmo design l298-7) for my rotary axis. The driver apparently works.  It does work in my Mach2 setup, but if I use Mach3 it refuses, while testing in Mach3 if it actually sends steps/dir signals I connected another driver on the A axis and it had no problems, so pulses are being sent. I have tried this on WindowXP and Windows 2000 (I have dual boot) but the results are the same, meaning that In Mach2 the rotary axis spins, in Mach3 it wont. I have tried pulse width 1-5 with no change.

Any thoughts?

Thanks you.
Konstantin.

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« on: February 26, 2006, 03:04:10 PM »
First of all, what is a 'unit' ? That word just messes me up because I cant even imagine what it could be. I mean the way that Mach2 uses the word unit.

Anyway.

My Y axis:
I have a leadscrew that travels 19mm per one turn. I use a XL timing belt (wich is 5.08 mm pitch) and two gears, on the motor  11 tooth and on the screw  21 tooth.
What is the 'Mach2 steps per unit' for this axis? I am using 1.8deg steppers in half step mode so there are 400 steps per revolution.

shaft revs per unit = 1/(5.08*21)
motor revs per unit = (1/(5.08*21) )*(21/11) = 1/5.08*11 = 1/55.88
Mach2 steps per unit = 400 * (1/55.88) = 7.158
Is this correct?

My X axis:
The lead screw travels 3mm per turn. The stepper is directly connected. Half step = 400 steps per revolution.

Shaft revs per unit = 1/3
Motor revs per unit = 1/3
Mach2 steps per unit = 400/3 = 133.33(3)
I am right with this calculations?

Konstantin.

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