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General Mach Discussion / Re: Z axis incorrect
« on: February 06, 2015, 07:22:13 PM »
I assume the motors are 200 steps per revolution (there are some old 180 step motors still around but it's not likely you have one) the Gecko G540 is x10 microstepping. The ball screws are 5mm pitch. So doing the math, 200 x 10 = 2000 pulses per rev, divided by 5 mm = 400 steps per unit. Go into Mach 3 motor tuning and enter 400 in the steps per unit for each axis (X,Y,Z). This will equal 400 steps to travel 1mm.
This is only the calculated values and in a perfect world would be exact, but the actual distance traveled may vary slightly due to ball screw precision. Next use Mach 3 calibration function and follow the instruction on the popup window... enter a distance value and then measure the travel with a digital caliper. This will correct the steps per unit numbers.
This is only the calculated values and in a perfect world would be exact, but the actual distance traveled may vary slightly due to ball screw precision. Next use Mach 3 calibration function and follow the instruction on the popup window... enter a distance value and then measure the travel with a digital caliper. This will correct the steps per unit numbers.