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Messages - jbrass

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1
Also check that your stepper motor shafts are tightly coupled to your lead screw. The motor may be turning, and your shaft isn't.
That will render weird circles and other shapes as well. I had this issue where a screw vibrated out of my coupling.

2
General Mach Discussion / Re: Cutting circle is larger than expected, help!
« on: December 02, 2011, 12:14:26 PM »
Ok, I adjusted the g code to cut a 12.7mm (1/2") circle by adjusting the radius and it works, but there must be a better way to do this.
g02 X6.35 y61.9125 I4.762 J0  (4.7625 radius)

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General Mach Discussion / Re: High Speed Servo as Spindle - My Solution
« on: December 02, 2011, 11:41:50 AM »
Why didn't you simply use a frequency multiplier, wich will multiply the MAch3 output from 45khz to 450khz (x10 example)

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General Mach Discussion / Cutting circle is larger than expected, help!
« on: December 02, 2011, 11:07:14 AM »
Ok, so I have my first CNC machine running.  but I noticed that when I am cutting a 12.7 mm radius circle, the radius is 1/16 larger it's cutting.
Do I need to compansate in my G code for the tool radius or diameter. Do I need to set a tool offset, how do I do that, if this is the issue?
John  

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