Re: one for the math gurus.....Squaring an Axis

Jon,
The point is that they don't have to be square. If all you do is read
several X coordinates at Y distances you will get the reqired reading
even if you use a 30-60-90 triangle. The bigest requirement is that
the surface is fairly smooth. It doesn't mater if it is concave,
convex or shaped like a lightning bolt.

Don't over complicate things.

Roger S

> The $12 squares at the Home Depot are a JOKE! They are accurate

within a

> couple of degrees, at best. A good quality machinist's square is

good to

> tens of arc minutes. That STILL is not good enough for machine

alignment

> testing. I checked a few of my machinist's squares, and they all