I am trying to learn how to use my new machine. I am having a great deal of difficulty getting any repeatability in the movement of axis'. I have set my homing position to z=0, y=23, z=3/6 on a 24 x 24 inch by 3. 6 inch platform and saved the configuration. If I home my machine and close mach 3 and then reopen it my DRO's do not reflect the home position that I left the machine in. I have done nothing other than close mach3 mill. When I reopen mach3 mill my DRO's read all zero. It seems to me that they should show the home position since I have done nothing except close and reopen mach3 mill. What am I missing? Another problem I have is that when I insert a g20 into my program the measure unit go haywire. In a simple program that works fine the first two lines are;
g0 f80
g1 z2 x8.5 y16
This program works fine. If I make the first line
g0 f80 g20
the the x and y axis movement (per the DRO's) is scaled by ~1/28 and the z by ~ 1/22. I have changed nothing except to edit the g code in Mach3 saved it and regenerated the tool path.
Image 1 is the DRO's prior to adding the g20, image 2 is the DRO's after the g20 is inserted and the x and y axis are manually moved (tab) 1 inch and the z axis 3.5 inches.
Any Help will be appreciated.