LinuxCNC + Mesa 7i92TF + Gecko G540. Docs are useless. Help, Please!

Actually when you know where to look, the documentation runs to hundreds of not thousands  of pages.
setting up a gantry machine requires joint axes and is covered in the  homing docs. linuxcnc.org/docs/stable/html/config/ini-homing.html
You usually need to read that link about 10 times before it makes sense.
Briefly you need a home switch on each joint (eg a joint is a motor). When set up right with negative  home_sequence, the first side of the gantry stops and waits for the other side to catch up before moving in unison. Gantry Squareness is adjusted by setting the home_offset in the ini file 
 

Thanks. I’ll order the switches.

Having a blast is not my goal here. I need a working tool.

To be clear, when I set up the limit switches the software will treat the two Y motors as one? Currently they are being treated as separate axes, which makes it impossible to move the gantry to a home position.

Thank you for the link.

I set up the software limits and homes. I assumed the hardware limits wouldn’t be necessary to get it running.

What I don’t understand at this point is how I get the gantry, which is currently at the midway point of the machine, 24” from the desired home location, jogged to the home location, in this software, so I *can* home it. I don’t see how wiring in the physical switches allows me to do that.

Hopefully the docs will get me there. Thanks.