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#1
 
06-15-2011, 02:20 AM
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HI all, I am not new to cnc but I am a newbie to G code programming. All of my previous experience is in ESSI. Here is my problem. I have just finished building my cnc router and have started setting it up. I am using USBCNC to control it. My Z axis is driven by an ACME thread and my initial pitch measurement is wrong so I am looking to measure the actual linear movement of the Z axis for 1 complete turn of the motor. So can I program the controller to rotate only the Z axis stepper motor for 1 complete turn only so that I can measure the linear distance travelled with a DTI? Regards Ian  |
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#2
06-15-2011, 10:50 AM
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| Set up your steps/mm to 200times any microstepping amount (8x for 1/8, 10x for 1/10, ....), then tell the machine to move 1mm.
__________________ Gerry Mach3 2010 Screenset http://home.comcast.net/~cncwoodworker/2010.html (Note: The opinions expressed in this post are my own and are not necessarily those of CNCzone and its management) |
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#3
06-16-2011, 12:08 AM
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| Thanks for the info. I ended up altering the step count a bit at a time and measuring the travel distance on my DTI. I think I have it to within 0.1mm over 25mm now. I just need to sort out my travel limits now and get the machine running faster. Regards Ian |
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