Setup for squaring twin X-axis gantry

[Ger21]

The only time you are going to know it's moved out of square, unless it stalls, is when the gantry is back at the home switches.

Or when your parts don't fit together.

Yes, I used to just bump into the stops before I had home switches. But it's much easier to just push a button and let the machine take care of it.

With 25 years of using 32mm cabinet hardware, and damn Italian machines, knowing a little metric comes in handy.