Mill tramming

vtcnc said:
I agree any misalignment "should" be able to be addressed with tramming, aligning and shimming. Not much more complicated than that.

To discover that the dovetails were "out of square" would be a disaster to end them all. It is hard to imagine how that could happen considering even the most rudimentary setups, measurement checks, basic machine operations, etc. in the factory making those slides and tables - and then have it land at the customer site half a world away.
Click to expand...
True. If the Z-axis dovetails are parallel, it's just a matter of shimming the column to plumb them up in the X and Y directions. If the dovetails aren't parallel, you have an expensive door stop.

Tom
 
I might be misunderstanding the question. When I read David's post I thought that he was asking about the table not being square to the spindle such that when you moved the table in the X direction you milled a taper. See the greatly exaggerated drawing.

table angled.jpg
 
@mickri coincidentally that was the second test the fellow was looking to do.
But his initial question was checking that the head and the spindle were tracking on parallel paths.
The only way I could visualize what he meant was by thinking about how a gondola car (the spindle) hangs plumb while moving along a diagonal path (the cable).
 
Could use a cylinder square with a DTI parallel to the spindle
 
The fellow's challenge was that he lacked an engineer's square or any other precision right angle.
But was converting his RF45 to CNC...
 
What first impressed me about a Bridgeport was how elegantly and precisely the tramming mechanisms had been thought out and implemented. Don’t you wish everybody did that?
 
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