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« on: October 18, 2013, 07:27:47 PM »
Dear Hood,
I am new to CNC and Mach 3, but I have machined several parts with no problems.
Here is what I do;
I open config> homing/limits, and enter the dimensions that are 1 inch smaller on all sides than the table is.
I jog to within 1 inch of the -X and -Y table size and +3 Z axis inches. I click Ref all Home.
I load the Gcode, and jog to the start point of my part. I zero all axis. I click soft limits.
When I Cycle Start, a message comes up warning me about being out of range and the option to proceed anyway. If I click OK, it will proceed to machine the part without using soft limits.
My problem part is much smaller than the soft limits.
On the Toolpath Screen, in the display window which on my computer is black, there is a Grey colored band that goes 375 inches in the -X direction. That is the program limit. This only happens with this part and 3 other parts.
I have no problem with soft limits while cutting parts that are larger than this problem part.
All the other parts show in the "Program Limits Absolute Coordinates" window the actual dimensions of the part. This problem part which is 13 X 17 inches shows in the "Program Limits Absolute Coordinates" window to be -X 375.8937,and +4.4860. The Y Axis shown is the actual dimension of the part.
lstiver53