[Savannahsdad]

I just put on a set of Stone Mountain strings and cables. The bow was pulling 70# before and now all I can get out of it is 65...maybe 67. The tuning dots are correct and I have twisted and un-twisted the strings trying to get the poundage correct. The most I was able to get was about 68 but the string was so un-twisted that I could not get the peep to align properly. Brace height and ATA are dead nuts on. Anyone know what to do next. Short of boxing it up and sending it to Crackers.

 

[buckfeverben]

How do your specs measure up? ATA? Brace height?

To my knowledge....you want to add twists to the string to increase poundage, not untwist...

 

[Hook Em]

That is what I thought...you want to add a few twists and that should take care of your problem.

cheers

 

[RC1959]

Poundage problems

Adding twists to the string shortens draw length and losses poundage. lengthing the strinh or shortening the cable adds poundage

 

[nuts&bolts]

Adding twists to the string shortens draw length and losses poundage. lengthing the strinh or shortening the cable adds poundage

Yup, what RC1959 says.

Add twists to the cables
to shorten the ATA.

When you shorten the ATA,
you are increasing the pre-load on the limbs.

When you increase the pre-load on the limbs,
you increase the available draw weight for a given number of turns
on the limb bolts.

Add twists to the bow string to slightly shorten the DL.
Remove twists to the bow string to slightly lengthen the DL.

Any time you add or remove twists to the bow string,
double check the cam timing
and creep tune, as needed, to get the wall solid
and to adjust the cables for the most forgiving rotation position
(1/2 twist can sometimes make the difference).

So, if you add twists to the bow string
to get the DL just right,
you are going to lose a little draw weight.

Once you have the correct DL,

and let's say you are shooting the bow
at the maximum draw weight = 70 lbs,
(limb bolts are maxed out)
but you measure and the draw weight is a little low.....

just add some twists to the cables
(to increase the pre-load)
until you get the draw weight back to 70 lbs
at your now adjusted correct draw length.

 

[Savannahsdad]

Yup, what RC1959 says.

Add twists to the cables
to shorten the ATA.

When you shorten the ATA,
you are increasing the pre-load on the limbs.

When you increase the pre-load on the limbs,
you increase the available draw weight for a given number of turns
on the limb bolts.

Add twists to the bow string to slightly shorten the DL.
Remove twists to the bow string to slightly lengthen the DL.

Any time you add or remove twists to the bow string,
double check the cam timing
and creep tune, as needed, to get the wall solid
and to adjust the cables for the most forgiving rotation position
(1/2 twist can sometimes make the difference).

So, if you add twists to the bow string
to get the DL just right,
you are going to lose a little draw weight.

Once you have the correct DL,

and let's say you are shooting the bow
at the maximum draw weight = 70 lbs,
(limb bolts are maxed out)
but you measure and the draw weight is a little low.....

just add some twists to the cables
(to increase the pre-load)
until you get the draw weight back to 70 lbs
at your now adjusted correct draw length.

Thanks nuts&bolts, I'll try this today at lunch!

 

[pdq 5oh]

I'd start by removing the cables and string. Twist all to factory specs and reinstall. Check bow specs. If draw weight is low, twist the cables. As cables are twisted to increase draw weight, draw length will also increase. Twist both cables the same number. You may need to twist the string a bit to get draw length back where it was. Lastly check let off. Twisting the top cable (cable attached to the outer perimeter of the top cam) will increase let off. Put in 1/2 twist at a time. Untwist this cable if let off is too high. The number of twisits needed to set let off won't affect draw weight. Be careful not to set let off over 80%. This is for a RH bow.