Tune for Tens-3

This is the beginning of "true" fine tuning. The fine tuning can be done during normal practice but requires consistency to be effective.
Choose a long distance: 60/70 meters for women, 70/90 meters for men.
Shoot 6 ends of 6 arrows. Make a chart of the groups using either a drawing
of the target or else using a tool such as Target Plot on a Palm Pilot.

Stiffen the plunger (CW) for about 1/2 turn.
Shoot another 6 ends of 6 arrows. Make a new chart for this group and mark on it ONE, 1/2 turn. Again, stiffen the PLUNGER another 1/2 turn, shoot, and chart, repeat and each time mark how many 1/2 turns.
Continue this procedure until the groups start to open up.
Be sure to record the number of 1/2 turns on each chart.
Turn the plunger back to the beginning of this exercise.
Weaken the PLUNGER by 1/2 turn (CCW) and shoot 6 ends of 6 arrows.
Chart the groups and the 1/2 turns.
Repeat the exercise as before until the groups begin to open up.
Review all the charts and find the best group.
Adjust the PLUNGER to the turns for that chart.
This should be the best tune.
If there is time and patience on your part, repeat the above exercise using 1/4 and 1/8 turns.
Excellence takes persistence!

Go to 18 meters and shoot a group in the center of the target. Now shoot a bare shaft (or several) and note where it/they hit on the target in relation to the group.

For example, see the Figure 1 to the right.
The fine tuning has found a better set-up.
Do not be concerned if the bare shaft did not
group with the fletched arrows.

NOTE: It is important to record where the bare shaft hits in relation to the group. Record this
in Figure 2 for later use.

If an emergency arises where the bow needs to be re-tuned quickly, set the nock point, then adjust the spring tension until the bare shaft hits relative to where the group is, as you recorded using figure 2.

How do you know if the arrow's vanes are touching the arrow rest or a part of the shelf when you shoot? Put some red lipstick on the support arm of the arrow rest. See figure 1 to the right.
Shoot some arrows and if the vanes have red on them, they are making contact. If there is some lipstick on the vanes, rotate the nock, shoot, rotate again, until there isn't any lipstick on the vanes.

Orienting nocks using the middle of the valley between fletch vanes may not be the best clearance for your arrows. You want to find the midpoint away from the rest in both directions in order to determine maximum clearance. Turn the nock and shoot until the vane begins to rub. Make a mark on the shaft directly opposite the mold mark on the nock. See figure 2. This is where the rub starts for that particular vane.

Turn the nock in the opposite direction and repeat the above procedure until the next vane begins to rub. Make another mark opposite the mold mark on the nock. These two marks indicate where the two vanes rub the bow. Turn the nock until the mold mark is directly in between these two marks.

This should be the point of maximum clearance. Mark every arrow the same (see figure 3.)

DATE:_____________Outdoor____Indoor_______ Notes____________
Riser (brand, height)_____________________________________________
Limbs(brand,wt &________________________________________________
length)________________________________________________________
Upper Tiller (#3)________________________________________________
Brace Height (#2)_______________________________________________
Lower tiller (#4)________________________________________________
Length of string________________________________________________
Type and number of_____________________________________________
strands_______________________________________________________
Nock point____________________________________________________
Sight used_____________________________________________________
Arrow brand and size______________________________________________
Arrow length___________________________________________________
Type of point and_______________________________________________
weight_______________________________________________________
Type of nock__________________________________________________
Type, Color, size of______________________________________________
fletching_____________________________________________________
Plunger______________________________________________________
Distance from_________________________________________________
Nockpoint to Kisser____________________________________________

Note from the author:
This method has been used for many years by some of the top archers. There
are quicker methods but I believe this is the most complete. This method
tunes and gives an idea of how the equipment works. Rick Stonebraker.