Yes, tell the machine to move 20" and see if it actually moves 20"Should I go back and tell the machine to move 20 inches and see tell the machine it moved 17.5 and see if it fixes it?
I have a USB 6040 Chinese machine. I have cut several things with it and they have turned out ok, but they have all been small. Yesterday, I cut something that was 17.5 inches long. I had a box that was supposed to be centered in the material, but it was off. Then I noticed that although my piece measured 17.5 inches, if I jogged the axis from one end of the material to the other, it measured 20 inches in Mach3. I went back and calibrated my motors again and they were off very slightly. I fixed that, but my measurements are still far off by the same amount. I am telling Mach3 to move the axis one inch. I use my micrometer to measure. I am sure it is not NASA quality measuring, but it is very close. I don't think it could be enough off to cause 2 and 1/2 inches in difference in a 17.5 inch span. Should I go back and tell the machine to move 20 inches and see tell the machine it moved 17.5 and see if it fixes it? Is there some other variable I am unaware of? Any help would be appreciated!
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Yes, tell the machine to move 20" and see if it actually moves 20"Should I go back and tell the machine to move 20 inches and see tell the machine it moved 17.5 and see if it fixes it?
Gerry
UCCNC 2017 Screenset
[URL]http://www.thecncwoodworker.com/2017.html[/URL]
Mach3 2010 Screenset
[URL]http://www.thecncwoodworker.com/2010.html[/URL]
JointCAM - CNC Dovetails & Box Joints
[URL]http://www.g-forcecnc.com/jointcam.html[/URL]
(Note: The opinions expressed in this post are my own and are not necessarily those of CNCzone and its management)
That fixed it! Thanks. I wasn't thinking how only a fraction of an inch would add up the bigger the job was. So, I used the 20 inch and it only moved 17.5. I plugged that in to the box and it fixed it. I was using the small measurement because my micrometer only goes so big. I am sure it is not perfect now, but it is close enough for me to keep learning... Thank you again,
Scott