by trwalters001 » Thu May 05, 2011 2:44 pm
Hi Bart,
Maybe I used the wrong terminology...
My system is using 1000 steps/inch.
I'm referring to the Mach3 Install & Config Guide, Section 5.5.2.3 "Automatic Setting of Steps per Unit".
In performing that procedure, Mach would set my steps per unit to something (slightly) other than 1000 (like 1006.8235454).
During that procedure, and after I let Mach set steps per unit, I could tell either axis to move 1", and it would move 1" +/- .0005.
I would then load my gcode file that draws a 1" square.
Let's say that my focused spot is .006" in diameter. That means that if I cut a perfect square, with no offset for tool diameter, the cut-out square should be .994" x .994".
My cut-out squares would be (for example) .980" x 1.015".
I'll be checking backlash tonight.
Tim