New spindle needing new mounts

[Cncparts]

Ye thought about scanning the gauge, might be the easiest option.

So Jazz what your saying is put the spindle in the middle of the bed, insert a piece of steel, say a 6mm rod as that will probably be the max shank size. Have this steel rod go down to the bed and bend 90deg and run parallel to the bed, touching it. If its square then the rod should stay flush to the bed along its length, and while I spin it around the bed 360deg..?

[JAZZCNC]

So Jazz what your saying is put the spindle in the middle of the bed, insert a piece of steel, say a 6mm rod as that will probably be the max shank size. Have this steel rod go down to the bed and bend 90deg and run parallel to the bed, touching it. If its square then the rod should stay flush to the bed along its length, and while I spin it around the bed 360deg..?

Yes and No to do this correctly you need a dial gauge on the end, just touching the bed is not accurate enough. The process would go something like this.
Position gauge at say 12oclock and Zero it then rotate to 6oclock. what ever the differance is how much your out of tram in that direction, now adjust the spindle half gauge reads half the amount.
Then repeat at 3oclock to 9oclock and now your spindle is trammed, it may take a few goes but each time the amount will be less.

Yes obviously the longer the piece the more accurate, it depends on your requirement and depth of cut you envisage.

Eddy Spindle being trammed correctly has nothing to do with Depth of cut.!! . . . If it's just tiny amount out it will show when surfacing and on flat surfaces like the bottom of pockets etc. Depending on which direction the tram is out you'll have tiny steps in one direction or the other.

The material your using will play big part to how accurate you want to tram. Wood for instance doesn't need so much accuracy but aluminium,brass and even hard plastics will easily show an out of tram spindle on any flat surface.

Then you have the fact edge angles will never be 90Deg so the longer the Z axis extension and tool Dia/length the more obvious it will be.