Tramming in a mill

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rzw0wr

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I have a cheap milling/drilling machine.

I noticed the other day that the column was not square with the table.

I adjusted it to square.
I knew that this would effect the rest of the mill.

I trammed in the head front to rear. (close to zero).
Then trammed in the table right to left to near zero.

Checking the front to rear tram the head was about .020" out.

My question is ; Is the a sequence to tramming in a mill?

Thank you,
Dale

BTW, I have to use shims to square the column and square the table front to rear.
 
rzw0wr said:
I have a cheap milling/drilling machine.

I noticed the other day that the column was not square with the table.

I adjusted it to square.
I knew that this would effect the rest of the mill.

I trammed in the head front to rear. (close to zero).
Then trammed in the table right to left to near zero.

Checking the front to rear tram the head was about .020" out.

My question is ; Is the a sequence to tramming in a mill?

Thank you,
Dale

BTW, I have to use shims to square the column and square the table front to rear.
Click to expand...

The procedure of aligning a mill depends on the actual design of the mill. They come in multiple flavors. Round column with a quill for z axis movement, square column with fixed spindle, square column with quill, Bridgeport style with knee for z axis and quill in head.Additionally they may or may not have the ability to rotate and nod the head.

What do you have?
 
I have a square column and the head rotates right to left.

The column to the table and the nod requires shims.
The head to table is set with the head rotation.

I am trying it all again.
I did notice that when the mill was built they used something that looks like body putty to fill some joint lines.
One of these joints was the base to column.
I raised the column on the bolts as far as I could then cleaned under the column mounting surface.

I got bunches of putty and stuff out from under it.

Column to table squareness changed quite a bit.

Thanks,
Dale
 
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