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TAC15/15i Cam Lean

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Unread 01-10-2012, 12:06 AM
Silver Member
Join Date: Dec 2010
Posts: 391
TAC15/15i Cam Lean

Hi All,
I wanted to get a short thread out for anybody who has experienced or is currently having a problem with "Cam Lean" on their crossbow.

So the first obvious question is "How Do I Know If I'm Having A Cam Lean Problem"?

Well, one of the tell tale signs that you could be affected by Cam Lean is when you paper tune your crossbow, if you are getting paper tears the are either tail high or tail low? If you make the necessary vertical adjustments on your arrow rest and are still getting the same condition, you most likely are being affected by a "Cam Lean Problem".

This condition can easily be corrected by using the following steps:

Caution: Do Not Perform these steps unless you have already squared your crossbow correctly and performed the basic adjustments in the PSE Owners Manual, which cover Paper Tuning.

1. Loosen the limb bolts that keep your crossbows limbs fully spread to the
open position. This will take the pressure off the crossbows cables and
string to allow the string to slack.
2. Remove the string and either add or delete 2 or 3 twists to the string and
then reconnect it as it was before you removed it. Make sure you keep track
of which direction you twisted it and exactly how many twists you've added.
3. After completing these steps re-tighten the limb bolts to fully open and lock
your limbs in the shooting position.
4. Load and shoot your crossbow at the paper tuner to determine if the vertical
paper tears have gotten worse or gotten better. If they're better go back to
step #2 and add as many twists as necessary until the paper tears are
removed and you ar5e shooting a good bullet hole pattern.
5. If the paper tears are worse, then you know you were turning in the wrong
direction, so you need to return to Step #2 and first turn 2 or 3 turns back to
where you originally started and then add at least 2 more turns in that
direction to improve the vertical tears.
6. Then, tighten your limb bolts and re-test your paper tuning pattern to
measure the improvement.
7. Continue this process until you have adjusted your crossbow until you have
a perfect bullet hole pattern. Keep in mind that you can put as little as a half
twist on your cable for fine tuning purposes. I do not recommend using half
or single twists when performing your first adjustments because if you
adjust two few number of twists, you will not see anything change when you
attempt to paper tune and measure your changes. It's easier to over adjust
and then remove a twist than not to know which way to twist due to under
8. Once you have a perfect bullet hole pattern, you have eliminated Cam Lean
on your crossbow. It's not possible for your Cams to be out of level with your
string and attain a perfect bullet hole pattern.


Jon Henry
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