The Delta turret radial arm saw column that serves to move
my drum sander’s head up and down has quite a lot of
backlash in the screw – over 1/4 turn. This made adjustment
maddening in the past because (in part) I had a weaker
motor (wimpy 10 amp or something one on the 9” saw
carriage) on it before. It was easy to take too deep a cut
and induce slippage of the belt. The new (well, salvaged)
20 amp motor is much brawnier of course so it can take
a more aggressive cut easily.
The DRO was easy to install. I tapped holes in the sander
arm casting and into the cast iron saw column. I pounded
the bracket to a modified shape on a piece of railroad
track. Installation only took about 40 minutes to
figure out and execute.