Ignoramus16551 wrote:

On 2011-06-15, Pete C. wrote:

Ignoramus10056 wrote:

It took about an hour, but I am finally done, trammed it with a dial
indicator. 0.001" over about 4 inches. (diameter of the circle that
the indicator makes when attached to spindle).

i

I'm rather a fan of this:

http://www.use-enco.com/CGI/INSRIT?P...MPXNO=19506532

This looks very nice. I am very tempted. But I wonder, what does it
tell me that I cannot learn with only one dial indicator? Just more convenience?

Since you aren't swinging an indicator around, you aren't introducing
potential error in the indicator mount / joints during movement. Since
you aren't swinging an indicator around you're staying at the same
contact points on the table or vise so you aren't picking up variations
in that surface either. Since you see both indicators at the same time
you don't have to remember readings between swinging an indicator
between sides so adjustment is vastly faster. Also, for manual mills,
you can set the head at angles quickly and accurately using a sine bar
and zeroing off of that. I think it's worth the money for the time and
fuss it saves you.