INCRA Ultra 24 - Manual (Page 3)

SYSTEM DESCRIPTION
Positioning Control
INCRA JIG ULTRA obtains its great accuracy and
repeatability from the precision cast saw-toothed
positioning racks which position the jig in exact
increments of
1 /
32
". Standard 1 /
32
" (blue) racks are
supplied with each INCRA JIG ULTRA. Metric (green)
racks with a tooth spacing of one millimeter and a metric
scale are available as an option. (See order information
at the back of this manual.)
Carriage
The reinforced square tube design of the carriage
provides the ultimate in strength and support for your
fence. The carriage rides on self-lubricating UHMW
guide bearing surfaces in the base to provide a velvet
smooth glide to your next INCRA JIG ULTRA setting.
Primary Sliding Scale
After setting up your INCRA JIG ULTRA, and “zeroing”
(see pages 8 and 10) to the bit or blade, slide this scale
to read 0" under the hairline cursor. Use this scale as
the primary source for readout of fence to bit or blade
distance.
Auxiliary Scale Slots
Four auxiliary scale slots are provided to allow additional
setups and cutting operations to take place without
altering the primary scale position. Simply slide the
supplied
1 /
32
" “floating” scale into position as needed for
reference. These extra slots are great for advanced
joinery requiring the use of the INCRA templates. You
can even leave your most frequently used joinery
templates from the optional
INCRA Master Reference
Guide & Template Library permanently installed.
Fence Mounting Bracket
This bracket provides a quick and easy means to attach
the INCRA Pro Fence System.
Base
Screw the base to a user-supplied piece of 3 /
4
" plywood
and clamp to the stationary tool of your choice. The base
provides strong support for the carriage and is the control
center for most of the INCRA JIG ULTRA’s features.
Hairline Cursor
The large hairline cursor provides a clear visual
reference of the fence location and spans all five scale
slots. The factory placement of the cursor can be shifted
to the rear of the base for use on smaller router tables
and table saws. (See Fig. 12 on page 8.)
Carriage Clamp
By pushing the carriage clamp down into the “unlocked”
position, the carriage is free to glide effortlessly to the
next setting. Pull the clamp handle up into the “locked”
position and the carriage is locked solidly in place, ready
for your next cut.
1
2
3
4
5
6
7
8
Micro Adjust Lever
After pushing the carriage clamp down to the “unlocked”
position, push the micro adjust lever down to place the
INCRA JIG ULTRA into the “micro adjust mode”. After
micro adjusting your fence position, simply reset the
micro adjust lever and then pull the carriage clamp up
into the “locked” position before making your next cut.
Micro Adjusting Knob
When in the “micro adjust mode”, use this knob to fine-
tune the position of your fence in one thousandth of an
inch increments. A hairline cursor and easy-to-read
scale give a clear readout of your fence movement.
Turning the knob clockwise moves the fence closer to
the bit or blade. Turn it counterclockwise and the fence
moves away from the cutter. Each full turn of the knob
moves the fence
1 /
32
". Micro adjust range is plus or
minus 1 /
4
", for a full 1 /
2
" of vernier travel.
Micro Adjust Scale With Zeroing
Feature
Large easy-to-read numbers make fine-tuning your fence
position a snap, and once you’ve micro adjusted and
pulled the carriage clamp up into the “locked” position,
you can re-zero the scale if you desire. Just rotate the
scale (not the knob) gently with your fingers to return the
zero on the scale to its original position under the cursor.
Micro Adjust Range Scale
Your INCRA JIG ULTRA has a micro adjustment range of
plus or minus
1 /
4
". By sighting through this scale to the
left end of the micro adjusting knob, this feature tells you
how far you have micro adjusted away from the mid-
range (0") position and which way you’ve gone. The
scale is marked off in
1 /
32
" increments.
9
10
11
12
INCRA JIG ULTRA Miscellaneous Hardware
Jig Mounting Hardware
4 ea. #10 x 7 /
8
" phillips pan head wood screw
4 ea. #10 flat washer
2 ea. #10 x
3 /
4
" phillips flat head wood screw
Fence Mounting Hardware
2 ea. #10-32 x 1 1 /
8
" phillips pan head screw
2 ea. 5 /
8
" O.D. 1 /
16
" thick flat washer (gold)
2 ea. 5 /
8
" O.D. 1 /
32
" thick flat washer (silver)
2 ea. #10-32 rectangular nut
Miscellaneous
3 ea. 6" x 7 /
8
" x .005" clamping shim (clear)
1 ea. Owner's manual
1 ea. Warranty card
3