# Is it possible to tram X/Y squareness with fixed feet?

**URL:** <https://forum.onefinitycnc.com/t/is-it-possible-to-tram-x-y-squareness-with-fixed-feet/7486>\
**Category:** Troubleshooting (X35/X50)\
**Created:** [August 30, 2021, 1:25pm UTC](https://forum.onefinitycnc.com/t/is-it-possible-to-tram-x-y-squareness-with-fixed-feet/7486 "2021-08-30T13:25:39Z")\
**Posts on this page:** 1\
**Showing post:** 6

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**Author:** ![349iq2345](https://avatars.discourse-cdn.com/v4/letter/3/bb73d2/32.png) [@349iq2345](https://forum.onefinitycnc.com/u/349iq2345)\
**Post date:** [August 30, 2021, 4:56pm UTC](https://forum.onefinitycnc.com/t/is-it-possible-to-tram-x-y-squareness-with-fixed-feet/7486/6 "2021-08-30T16:56:55Z")

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Hey eaststreetcarry,

> [@eaststreetcarry](#):
>
> > [@349iq2345](#):
> >
> > That’s hard. But in your drawing, you show a square that is rotated. Are you sure it isn’t a parallelogram?
> 
> No, I’m not sure about Y. I only swept a fixed reference across ~75mm (~3") in X and it gained ~1.5mm. I didn’t check Y yet.

Please check Y too. You want to be sure that the assumption of the machine being out of square is right.

E. g. your workpiece, has it a right angle (or could you mill a workpiece which has one, a 90° corner), and then could you hold a joiner’s square to it? Is it square or parallelogram then?

> [@eaststreetcarry](#):
>
> > [@349iq2345](#):
> >
> > At first I would measure the diagonals between the opposite feet (left front to right rear and vice versa). The diagonals have to be identical.
> 
> How is one suppose to measure this distance? And from what reference point?

One possibility would be to measure the distance of the outer corners of the feet, like this (imagine these little raspis were the machine’s feet):

 ![measure_distance_corners](https://us1.discourse-cdn.com/flex022/uploads/onefinitycnc/original/2X/d/ddbea7766c2469f78e13074383bbcec54f53969e.jpeg)

> [@eaststreetcarry](#):
>
> > [@349iq2345](#):
> >
> > If it’s made of wood, you can glue a cross-grain dowel into the holes and drill new holes into your frame.
> 
> It’s aluminum.

Shit. You loose.

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