DARTON Tundra Extreme User manual

DARTON Tundra Extreme
Instructions
A Technical Bulletin
The following information is to assist
you in maintaining maximum performance
from your C/P/S Extreme bow.
There are 5 tuning marks on the CAM
and 5 on the Control Wheel. They are let-
teredA- E and enable you to check the tune
of your bow at any draw length adjustment.
All you need to do is align the cables with
marks labeled the same as the position you
have used for the bowstring anchor. If the
bowstring is anchored in the 'C' position be
sure the cable lines up below the tuning
mark labeled 'C' as shown in the diagram.
Once the bow is in correct tune it will
continue to be in correct tune at any draw
length adjustment of the module or bow-
string anchor without any additional work.
This can be easily checked with a quick
visual look at the cables and tuning marks.
To change draw lengths put the bow in a
bow press and remove the tension from the
cables.
Changing the bowstring anchor location
by one hole changes the draw length by
1/8". Adjusting from 'A' bowstring anchor
location on the Control Wheel to the 'B'
location without changing the module loca-
tion increases the draw length by 1/8".
Adjusting the module one location (1
through 5) without changing the bowstring
location changes the draw length by ¼".
It is recommended that whenever an
adjustment is made to change the draw
length over 1/8" that you reference the chart
and stay as close as possible to one of the
five combinations indicated to maintain
optimum stored energy.
I. POWER CAM (bottom cam)
Align the power cable (the split ended
cable that attaches to the top axle) below
the tuning mark on the Power Cam (figure
1) that corresponds with the bowstring
anchor position on the Control Wheel, as
indicated in figure #2 . If the power cable
passes above the tuning line (viewed from
the same perspective as figure 1), then twist
the power cable enough to line it up cor-
rectly.
If the power cable passes too far below
the tuning line, then UN-twist the power
cable enough to line it up correctly. In the
event that all the twists are out of the power
cable and it still passes below the bottom
tuning line, put twists in the bowstring and
start this process over.
II. Control Wheel (upper wheel)
The adjustment of the control wheel
affects nock travel and influences the prop-
er location of the nockset. Even an out-of-
spec. adjustment does not result in a diffi-
cult bow to tune, but attention to the correct
adjustment will result in the most forgiving
set-up. Align the control cable (the cable
that attaches directly to the upper wheel)
with the tuning mark on the Control Wheel
that corresponds with the bowstring anchor
position on the Control Wheel, as indicated
in figure #2 .
The bow string must remain anchored
in the same position on the upper Control
Wheel as it was while tuning the lower
Power Cam.
If the control cable passes above the
tuning line (viewed from the same perspec-
tive as figure #2), then twist the control
cable enough to line it up correctly.
If the control cable passes too far below the
tuning line, then UN-twist the control cable
enough to line it up correctly. In the event
TUNING TIPS FOR DARTON C/P/S BOWS
that all the twists are out of the control
cable and it still passes below the tuning
line, put twists in the bowstring and start
the processes for both the Power Cam and
Control Wheel again.
III. Draw length adjustment
Optimum stored energy and level nock
travel are maintained through out the entire
draw length range of your bow if the fol-
lowing instructions are observed.
All draw length adjustments must be
made in a press.
C/P/S Extreme bows use an adjustable
module system to provide a wide range of
usable draw lengths. Each module has five
adjustments of approximately 1/4" incre-
ments giving a total 1" adjustment of draw
length. The upper Control Wheel has five
bow string anchor positions. This provides
1/2" of additional draw length adjustment
in approximately 1/8" increments. This
adjustment maintains optimum stored ener-
gy if done in the manner described in figure
#4. 1. Adjusting the draw length within the
range of the installed module involves loos-
ening one screw and removing another.
Loosen the button-head screw found in the
slot near the draw stop portion of the mod-
ule. This screw is visible by looking at the
far left side of the Power Cam pictured in
figure #1. After loosening the button-head
screw, remove the adjustment screw from
the opposite side of the Power Cam (see
#2
C
A
E
BOWSTRING
POWER CABLE
CONTROLCABLE
(LOCATED BELOW
“C” TUNING MARK)
FLAT HEAD
BOWSTRING SCREW
CONTROLWHEEL
FIGURE #2
Rev. 11/03
Install Included
Optional Draw
Stop Cushion Bowstring
Control Cable
Power Cable
(Located Below
“C” Tuning Mark)
Module Lock Down
(Buttonhead Screw)
Tuning
Marks

1B = 29” 2C = 29 3/8” 3D = 29 3/4” 4E = 30 1/8”
1A = 28 7/8” 2B = 29 1/4” 3C = 29 5/8” 4D = 30” 5E = 30 3/8”
1B = 30 1/2” 2C = 30 7/8” 3D = 31 1/4” 4E = 31 5/8”
1A = 30 3/8” 2B = 30 3/4” 3C = 31 1/8” 4D = 31 1/2” 5E = 31 7/8”
figure #3). Increase the draw length by
increasing the gap between the module and
the Cam Base by aligning the appropriate
hole with a higher number adjustment hole
as pictured in figure #3. Decrease the draw
length by decreasing the gap between the
module and the Cam Base by aligning the
appropriate module hole with a lower num-
ber adjustment hole. Insert the adjustment
screw into the desired draw length hole and
tighten completely. Retighten the button-
head screw on the opposite side of the
Power Cam.
2. An additional draw length adjust-
ment is available by changing the bow
string's effective length utilizing one of the
five (5) anchor positions on the Control
Wheel (fig. 2). Each change in the bow
string anchor position changes the draw
length 1/8". To adjust the draw length on
the Darton C/P/S Extreme bows you should
consider adjusting both the Power Cam
module (position 1-5) and the Control
Wheel bowstring anchor (position A-E).
The chart in figure #4 shows the positions
that will give the best stored energy at a
particular draw length.
3. Adjusting the draw length by chang-
ing modules is just as easy. Remove the
button-head screw found in the slot near the
draw stop portion of the module. This
screw is visible by looking at the far left
side of the Power Cam pictured in figure
#1. Remove the adjustment screw from the
opposite side of the cam (see figure #3).
Remove the control cable. Slide the old
module out and the new one in. Line up the
appropriate module hole with the desired
adjustment hole and reinsert the adjustment
screw. Then from the opposite side of the
cam, reinsert the button-head screw, tight-
en. Reinstall the control cable. Double-
check that all screws are tight and all
strings and cables are securely seated
before removing the bow from the press.
C/P/S Extreme bows are shipped in the
3C position. Once you've verified the
Power Cam and Control Wheel tune posi-
tions, you may adjust your draw length
without any further need for adjustment.
The alignment of the control cable and
power cable alignment with the tuning
marks will change with any subsequent
bow string adjustment but will retain the
correct tune.
The Control Cable will require adjust-
ment whenever modules are changed.
When making necessary adjustments do not
use a bow press that anchors the bow
at the grip. It is important to check that
the strings and cables (especially the
cables near their anchor positions) are
positioned correctly in their grooves
before reapplying tension to the bow
and removing it from the press.
Routinely tighten the screws on the
Power Cam. Regularly checking all
the moving parts for your bow is rec-
ommended. Tightening the screws on
the Power Cam is particularly impor-
tant. Any loosening of these screws
may cause damage to the bow and/or
the shooters.
Included in the service package are
draw stop cushions with pressure
sensitive adhesive on the back surface.
These are to be used on the draw stop
(fig.1) if there is any objectionable
noise associated with the power cable
making contact with the draw stop
when full draw is reached.
Any adjustable cable guard should
be set to create minimum cable angles.
It will then provide the best limb/cam
balance.
Your C/P/S Extreme bow includes
efficiency-enhancing nock sets on the
bowstring near the Power Cam and the
Control Wheel. These nock sets
increase the speed of your arrows
while reducing the wear and tear on
your bow when shooting light arrows.
BOW STRING
ANCHOR POST
#1 - #5 MODULEADJUSTMENT SCREW LOCATIONS
FIGURE #3
Tundra, 65% C/P/Sb 27 3/8 - 31 7/8” Draw Length Adj. Range
#2 Module
#3Module
#1 Module
Optimum Tune
Optimum Tune
Optimum Tune
1B = 27 1/2” 2C = 27 7/8” 3D = 28 1/4” 4E = 28 5/8”
1A = 27 3/8” 2B = 27 3/4” 3C = 28 1/8” 4D = 28 1/2” 5E = 28 7/8”
1B = 29 1/2” 2C = 29 7/8” 3D = 30 1/4” 4E = 30 5/8”
1A = 283/8” 2B = 29 3/4” 3C = 30 1/8” 4D = 30 1/2” 5E = 30 7/8”
1B = 31” 2C = 31 3/8” 3D = 31 3/4” 4E = 32 1/8”
1A = 30 7/8” 2B =31 1/4” 3C = 31 5/8” 4D = 32” 5E = 32 3/8”
Tundra, 75% C/P/Sb 27 3/8 - 32 3/8” Draw Length Adj. Range
#2 Module
#3 Module
#1 Module
Optimum Tune
Optimum Tune
Optimum Tune
1B = 28” 2C = 28 3/8” 3D = 28 3/4” 4E = 29 1/8”
1A = 27 7/8” 2B = 28 1/4” 3C = 28 5/8” 4D = 29” 5E = 29 3/8”