RF-25 Mill Z-Axis Scale
Mill DRO & X Y Axes
Scales. Mill
Tachometer & SFM
9x20 Lathe DRO X
& Z1 Axis Scale.
9x20 Lathe Tachometer & SFM
Taig Mill
Taig Mill DRO &
X Y
Z Axes Scales.
Taig CNC Mill DRO
Taig
Mill Tachometer & SFM Taig Micro
Lathe DRO
Six inch hardened SS
scale with SPC output. M3-.5 threads.
I had to trim some scale off the top using a cut-off wheel,
followed by a carbide end mill &
then
diamond wheel grinding.
Radius the two top corners as they are close to the on/off switch.
This vertical-style scale has a good SPC plug receptacle.
I used this type for the
RF-25 mill
&
9x20 lathe scales, too.
Not as easy to tack-on wires, though, if that is the route you are taking.
SPC cables from
LMS. All cable plugs are
held in place with a spot of hot glue.
I soldered
a 100µF 10v tantalum capacitor across the battery leads of
the scale.
Z-axis, ⅛" thick,
scale-mounting plate. The four mounting hole locations were accurately
determined using ¼-20 transfer screws. This bracket configuration allowed me to retain
use of the speed-settings plate. An earlier version used a 1/16" plate, but was
too thin.
The depth-stop function is retained.
Detail - lower brackets.
I have installed rubber washers on all the scale mounts
to
allow a little floating to reduce the strain on the transducers.
Radius the top scale corners by grinding with a diamond wheel.
The scale top end is free floating. Also, the zero of the printed in/mm
scale is even
with the bottom edge of the transducer when the quill is fully retracted.
Cable runs up into the belt guard housing. Button-head bolts look
nice.
The black cable is for the Z-Axis scale & the gray cable is for the
tachometer.
The cables are fastened down about every three inches along inside right side
corner of the belt housing,
then exits behind the DRO's arm mount.
The flat sides of all but two cable tie-downs, are set against the housing
inside corner so
as to not turn
under extended vibration. The arm's base is a triangular bracket
that is mounted under two of the motor hold-down bolts. The arm is made out of
1010 (1" x 1")
80/20 extruded aluminum.
I ran the cables inside the arm's back-side channel & then snapped in
black
plastic 80/20 inserts.
In retrospect, 1515 (1½"
x 1½") extrusions would have been a little stiffer.
I like to use a
Unibit
to make
nice clean holes in thin materials.
I have since removed the quill
levers.
Mill DRO & X Y Axes Scales. Mill Tachometer & SFM