lRF-25 Mill X-Axis Scale
Scales, Brackets, Over-travel Switch, Cables, Handle Animations
RF-25 Mill DRO &
Y Z Axes
Scales. RF-25 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
Scales
18" scale, hardened SS.
This style scale has a good
(enclosed) SPC
plug receptacle (manual).
Trimmed scale scrap with plastic cover removed.
2" x 2" aluminum L-channel cover mounted using front dove-tail
slot.
Six, ¼-20, flat-head screws hold the
L-channel for a very rigid configuration.
Machined steel dovetail nuts for mounting.
Retained access to the
center oilier hole.
The L-channel serves as the scale mount & protects it from impact, fluid & debris.
Brackets
OEM over-travel switch & bracket configuration.
Scale transducer mounted on back of
power-feed over-travel switch bracket. Used transfer screws
(M3-.5 threads)
for accurate alignment. Soldered a 100µF 10v tantalum
capacitor across the battery leads on each of the scales.
New spacer bracket replaces original.
Over-travel Switch
This mount protects scale's front (which is not needed) &
places the SPC output on the bottom, back, right.
Only hardened SS scale surfaces are exposed.
Power feed end-of-travel mechanical stops mounted on top/inside bracket surface.
These are the original
stops with the stepped end (fly) cut flat.
The ¼-20 mounting bolt is flush with the top of the L-channel bracket.
The electrical stop turns the power feed motor off about four full crank turns
(for this machine)
before reaching
the lead screw
mechanical end-of-travel;
just enough distance to allow a
safe stop from full
speed.
This is a machine-dependent distance that needs to be empirically determined.
This area was relieved (both sides) to allow the scale's
lower
bracket edge
to clear the table locks.
A lock nut will be used in the final installation.
The scale rests on pairs of self-aligning,
spherical washers.
Installed rubber washers
on all the scale mounts
to
allow a little floating to reduce the strain on the transducers.
Cables
Drilled & tapped the front right carriage corner to mount a
cable strain relief.
It is the cradle/nylon
tie type of fastener. All cable plugs are
held in place with a spot of hot glue.
Mounted a cable strain relief on the front left corner of
the
Y-Axis bracket to hold the over-travel switch cable.
Handle Animations
Revolving, chrome plated carbon
steel handle, animation.
Left: OEM plastic handle table locking levers interfered with
DRO brackets.
Right: Replacement die cast zinc alloy/steel locking adjustable levers.
Animation of the replacement
locking levers for the table.
Kipp (USA) adjustable handle (ball style) 5/16-18 with a 1.97"
(50mm) long threaded stud.
Levers now more accessible, clamp much tighter, clear the scale & are away from the
mechanical end of travel.
RF-25 Mill DRO & Y Z Axes Scales. RF-25 Mill Tachometer & SFM
Scales, Brackets, Over-travel Switch, Cables, Handle Animations