INCRA Threaded Segment - Manual

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Manufactured by: Taylor Design Group, Inc. P.O. BOX 810262 Dallas, TX 75381 w w w . i n c r a . c o m
Threaded Segment Replacement Instruction (Base)
Tools required:
Leverage Tool w/nylon collar (supplied), 1/8” hex key, scratch awl
NOTE: If you are converting an Imperial LS Positioner to a Metric model, replace the Imperial Lead Screw Assembly in
your LS Positioner’s Carriage with the Metric Lead Screw Assembly provided BEFORE continuing with these instructions.
1. Remove the black
nylon arrow clips from
each end of the Base.
(Replacements are pro-
vided so don’t worry if
they break.)
2. Use a scratch awl or
small screwdriver to
push out the pivot rod
that secures the red
clamp handle. As the
rod is removed keep an
eye on the small black
washers on either side
of the red clamp handle.
These will need to be replaced later.
3. Remove the 1/8” thick UHMW clamp bearing pad and the
small collection of thin
plastic shims between
the pad
and the metal spring
engager. Retain all for
later re-assembly.
4. Using a 1/8” hex key,
unscrew the (2) button
head fasteners located
on either side of the
clamp bearing pad and
remove the existing
Threaded Segment held
by these fasteners.
5. To gain better access for the Threaded Segment replace-
ment, remove the (2) button head fasteners with washers
that secure one of the acrylic view windows and set the
window and fasteners aside.
6. Replace the Threaded Segment previously removed with
the New Threaded
Segment provided.
DO NOT TIGHTEN THE
BUTTON HEAD FASTEN-
ERS AT THIS TIME.
They
should remain slightly
loose for the next step.
7. Slide your LS Posi-
tioner’s Carriage into the
Base. (NOTE: If you are
converting an Imperial
LS Positioner to a Metric
model, make sure you
have already converted
your LS Carriage to the Metric Lead Screw Assembly before
proceeding.) Position the Carriage so that the Base is ap-
proximately centered on the Carriage length.
8. Insert the end of the provided Leverage Tool into the
small hole located on the curved side of the LS Base near
the Metal Spring Engager.
9. Push the Leverage Tool
handle so that the nylon
collar bears against the
Metal Spring Engager.
Push and release the tool
a few times to “seat” the
Threaded Segment prop-
erly with the Lead Screw on the LS Carriage. Finally, apply
continuous pressure to the Leverage Tool as you tighten the
(2) button head fasteners to secure the Threaded Segment
to the Metal Spring Engager.
10. Remove the Leverage Tool and slide the LS Carriage from
side to side within the Base to ensure that the threads be-
tween the Threaded Segment and the Lead Screw do not
“grind” against one another. If the threads make contact during
the slide, you must adjust the relative position of the Metal
Spring Engager to move the Threaded Segment away from the
Lead Screw as described in Steps 15-18 below. If the threads
do not grind against one another continue with Step 11 below.
11. Replace the thin plas-
tic shims and 1/8” clamp-
ing pad removed in Step
4. The thin plastic shims
will slide between the
Metal Spring Engager and
the protruding “fin” on
the LS Base extrusion. (Fig 35 on Pg 15 of your LS Position-
er’s Owner’s Manual offers a good illustration of the shim
placement.) The set screw on the 1/8” UHMW clamp bearing
pad should nest into the slotted hole on the Metal Spring
Engager. Make sure to orient the 1/8” clamp bearing pad so
that the surface with the thick tape adhered to it faces the
Metal Spring Engager.
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