Lead-screw Conversion
Last updated on
Saturday, March 25, 2023 02:17:32 PM
Mountain US Time Zone
HOME
Lead Screws, Split Nut, Anti-backlash Nut Adjustment, Stepper Motor Couplers
Converted the mill's lead screw,
nut, & bearing assemblies
to those for CNC & NEMA 23 stepper motor mounts.
Lead Screws
The
Taig CNC conversion kit: lead
screws with bearings &
bosses, adjustable bronze nuts, couplers, &
NEMA 23 stepper-motor
mounts.
The nylon tubing is
cut diagonally (45 deg) into 3/4" long coupling pins.
There are 4
pins per coupler. The diagonal
cuts can assist in assembly.
Leftover parts from the conversion provided
a
precision
ground 1/2-20 left-hand lead screw with bearing plate &
bronze
nut assembly thus allowing the implementation
of a very useful
upgrade to the 9x20 lathe
cross slide.
The NEMA 23 motor mount screws onto
the finely threaded
boss & is clamped into place by a ring & set screw.
The bronze, zero-backlash nuts have two (outside)
clamping
screws & one (center) locking set screw.
Split Nut
X-axis install. The bronze split-nuts work much better than
expected. White lithium grease is a good lubricant.
Anti-backlash Nut Adjustment
X-axis nut. To adjust the
anti-backlash nuts, first
remove the stepper, unbolt the bearing plate &
push the slide until the nut is exposed. Loosen the
center set screw, then one at
a time, tighten the
outer screws until the lead does not turn, then
back-off a 1/4-turn. Re-tighten
the center set screw.
Y-axis anti-backlash nut.
I used a wrench to feel
the lead screw tightness.
Stepper Motor Couplers
X-axis boss & coupler. Do not over tighten
the lock nut
as it can bind (break)
the bearings that are inside the boss.
Y-axis boss & coupler. Note the four
holes for the 3/4"
long nylon
coupling pins.
A simple yet effective coupler.
Z-axis boss & coupler.
X, Y, & Z-axes lead screws now converted for CNC.
Click on linked thumbnails #ad
Click on linked thumbnails
#ad
Lead Screws,
Split Nut,
Anti-backlash Nut Adjustment,
Stepper Motor Couplers
