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General Mach Discussion / Re: Motor Tuning Math
« on: December 14, 2015, 10:15:27 PM »
Hello All. I had an "Aha" moment. I found my problem. Refer to my previous post about the motor tuning math. My stepper motor resolution is 0.0125 mm. I was trying to get to -0.01 mm penetration depth on the Z-axis. I kept losing track of position.
This attached file demonstrates the fix. When I had the penetration set to -0.01, the problem occurs every time. I changed the value to -0.05 mm because it's an exact multiple of 0.0125 mm. Now it tracks perfectly. Now I don't have to sit and BABYSIT this machine anymore!
My 3-Axis CNC mill is a a "REDONDA" made by "www.DONGDADK.com", from China. It's a great little machine for the money I paid. I just had to work out this issue. If you have one too (eBay), don't be discouraged! I'm using it to make printed circuit boards. I use CopperCAM.
Thank you Tweakie and RICH. I wanted to share my solution with everyone in case the same problem happens to them. Simply put those "micro-steps" get lost! One has to observe the stepper motor / leadscrew step resolution. For me, that's 0.0125 mm (about 0.4 MIL).
Best regards, Richard V
This attached file demonstrates the fix. When I had the penetration set to -0.01, the problem occurs every time. I changed the value to -0.05 mm because it's an exact multiple of 0.0125 mm. Now it tracks perfectly. Now I don't have to sit and BABYSIT this machine anymore!
My 3-Axis CNC mill is a a "REDONDA" made by "www.DONGDADK.com", from China. It's a great little machine for the money I paid. I just had to work out this issue. If you have one too (eBay), don't be discouraged! I'm using it to make printed circuit boards. I use CopperCAM.
Thank you Tweakie and RICH. I wanted to share my solution with everyone in case the same problem happens to them. Simply put those "micro-steps" get lost! One has to observe the stepper motor / leadscrew step resolution. For me, that's 0.0125 mm (about 0.4 MIL).
Best regards, Richard V