TommyF,
What specifically does the G28 Z input in SoftLimits setup menu?
I assume you are refering to the G28 home location coordinates on the bottom of the flyout screen
( Motor Home/SoftLimits) via Config>Homing Limits. There is no information in the Using Mach3Mill manual
for that part of the screen.
G28 home location information is given in section 5.6.1.4 of Mach3 CNC Controller Software Installation and Configuration
manual. It states:
The G28 coordinates define the position in absolute coordinates to which the axes will move when a G28 is executed. They are interpreted in the current units ( G20 / G21 ) and are not automaticaly adjusted if the units system is changed.
Now just some comments:
- I personaly have never used that part of the flyout.
- The thread topic is Re; real meaning of G28.
G28 is a G code commmand, defined by Mach3 in the manual 10.7.10 ( see also G28.1 , G30, G53). I have seen many
comments / questions over time about it's use. There are threads on the subject. One should have an understanding
of G28, G28.1, G30 in light of referenced / unreferenced machine/ type of machine, G54 / G90 / G91 active or inactive, and
what happens using the commands and screen buttons, may as well throw in axis feedrate.
- There is a lot to gained by playing around with G28 relative to differant states of the machine...........one can learn a lot!
FWIW,
RICH