ShumaTech DRO Continued
Grizzly G3103 Mill
Bringing Home a
Sheldon 12" Shaper
The circuit board is partially assembled.
remainder of the ICs get installed.
tactile switches and displays are installed.
a cable to a Harbor Freight digital caliper.
close-up of the same. A 100µF electrolytic capacitor is
substituted for the standard button type battery.
3-1/2 of the 4 caliper jaws removed, the caliper is transformed into a
digital scale and mounted.
are drilled free-hand in the saddle. It appears that before it
was beige, the saddle was painted red! Well, at least the other
side is beige.
axis scale is partially mounted.
arm and cover are installed.
on the X axis. This is a temporary scale that will be used until
my new Jenix scale arrives.
caliper jaw is embedded into the plastic. Having this much
surface holding the jaw made for good support.
holes are added.
the holes for the cover. An extra drill bit holds the cover in
place while I measure for the next hole.
limit switch is remounted and the bumper is put in place. With
the temporary scale, my X axis was limited to just under 13 inches
until the new scale arrives.
the read-out while still working on the bumper for the right side of
the X axis.
the DRO for its first task. Cutting its own housing!
the housing. The white circles are switches to switch between two
scales on the Z axis and to choose either RPM or electronic edge finder.
is the Fairchild photo transistor for measuring spindle speed, housed
inside a liquid and swarf proof HDPE box.
mounted. Looking up at the under-side of the spindle pulley
(which is a lot more shiny than it looks here).
holds the DRO in place and adjusts in length as well as allowing the
unit to swivel.
was out of over-lays (and I wasn't crazy about the blue lettering
anyway), so I made my own.
for now. Step back and admire one very cool DRO.
My thanks to Scott for a useful and fun project!