Seeking some practical squaring advice.

[Wal]

Hi all,

I've started my fixed gantry mini-mill build and so far so good. Here's a pic of my bare x-axis and one with the machine table loosely fitted.



It's a simple build made up of three linear stages, with the x riding on the y. Here's a 3D visualization:



Looking ahead, I can see that I'm going to have a bit of a challenge when it comes time for me to square the rails on my x/y gantries.

I'm pretty confident that I can get each pair of rails running parallel, but I'm wondering if anyone has any suggestions on how I can ensure that the two sets of rails run perpendicular to each other.

I'm aware of the millkins script (which is an X-Y skew correction script) available from here:

LinuxCNC Documentation Wiki: ContributedComponents

but if I can get it close to start with, then that can only be a good thing.

Thanks for any advice!

Wal.