13 replies to this topic

[xbow755]

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
adjustment.
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.

Regards,

Xbow755

[deerboy]

thank you.

[xbow755]

deerboy, on 11 January 2012 - 12:51 AM, said:

thank you.

As always, you're more than welcome.

I hope everybody gets some use from the information.

Regards,

Xbow75

[Twanger]

A treasure trove of information!
Thank you so much for making this information public.

[xbow755]

Hi Twanger,
I'm not in the habit of recommending other peoples websites, since we work hard trying to build those that we beleive provide good value for the members who are interested in the core topics.
That said, in the event you would like some additional information to review on the PSE TAC15/15i crossbows, I would suggest you visit a website called: longrangehunting.com   Then go down the forum menu until you find TAC15/15i  and click in.  Here you will find several pages of excellent articles written specific to these crossbows. Some of the articles have been ported from that site to this one, but many are unique.

Good luck and good reading!

Xbow755

[Twanger]

Thanks again!

[xbow755]

I see you've found it.  

If you review many of the posts with the TAC15/15i Forum, you should find several pages of articles that will add a great deal to your overall knowledge of these crossbows.

Any time you feel inclinded to add any new or additional information in either location, it's always useful and appreciated.

Your input on the broadhead testing that you recently performed was very helpful.
Thanks for putting it out there.

Xbow755

[Twanger]

It's interesting...
With the Rocket Steelhead Mechanical I tie the blades down with Dental Floss when I want to practice with my vertical bow.
This keeps the blades from opening, and getting damaged or dulled.
With ten wraps of floss knotted several times between the wraps they will last several shots.
My arrows fly 268 fps, weigh 420 grains, and that amounts to 67 ft-lb of KE.

The dental floss doesn't even last one shot with the Tac15.

I'm going to have to look at using rigging wire.

[Lightfoot]

When tightening or loosening bolts as described, is it wisest to do like a half turn on one side then a half turn on the other? Would backing off one side completely and then the other do any damage?

Thanx in advance.

L.

[xbow755]

It's always best to balance ones adjustments by taking off or adding equal turns, a little at a time.

Regards,

Xbow755

[topgun80]

"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."

Sorry for the newbie question but am i reading this right, all you have to do to change strings and cables is to back the limb bolts out?

[xbow755]

Hi Topgun80,
Bingo!!!!  You hit the nail right on the head.
PSE the manufacturer of the TAC15/15i crossbows invented the first and only crossbow in the business that doesn't require a bow press to work on the cables, string or cams.  If you had purchased your TAC brand new and it was shipped to you, it would have come with the limbs folded back.  When setting up your crossbow, you would have had to open the limbs after attaching the bow to your stock.  As you tightened the limb bolts they would have provided the spread to place them in the fully open and locked position.  PSE's instructions for changing cables would tell you to simply losen the bolts that hold the limbs in the open position. They suggest that you back off the limb bolts in equal amounts by loosening each limb bolt one or two turns at a time.

Hope this helps for future work on your xbow.

Regards,

Xbow755

[Buzzard Bait]

topgun80, on 24 March 2012 - 08:53 PM, said:

Sorry for the newbie question but am i reading this right, all you have to do to change strings and cables is to back the limb bolts out?

This was one of the reasons I bought a TAC 15, no press required to work on the bow!

[xbow755]

More than a few people have fallen prey to the question of what type of bow press do I need to work on these crossbows, so you're not alone on this one.

Regards,

Xbow755