Carbon limbs

[Colin123]

I've bought some new 61 lbs bow limbs with carbon laminates & when I shoot with them, they vibrate at the tips. I've contacted the manufacturer & set the brace height within his tolerances & increased it progressively by up to an inch, but it doesn't help. At the higher brace height, there is an increase of hand shock. I've tried changing my wrist position to a high wrist grip, but that doesn't help either. What causes the limb tips to vibrate & has anyone any suggestions to what I can do to get rid of it & the accompanying noise, as it's going to be impossible to hunt with them

[SHOOTO8S]

I wouldn;t think carbon in your limbs to be the problem, as carbon normally soak's up vibration.Two biggies with limb vibration, or as some call it, limb flutter, is brace and tiller.You might wanna try going lower with brace, to see if theres any improvement.
 Not knowing if your bow's tiller is adjustable(ILF type) or not but whats desired it to have both limbs return to brace at the same time. Heres a trick to check to see of the limbs are timed....remove the string and put a strip of masking tape down the center of the limb from the beginning of the string grooves to say 10 dowm the limb...then as you draw the bow a few inches, have a friend apply lipstick to the limb side of your string...then come to full draw and shoot a test time, as you normally do...unstring the bow and measure to see if the lipstick line on the masking tape is the same lenght on both limbs...if not the limb with the shorter measurment is coming to brace ater that the other and needs weight added,if thebow is ajustable for tiller...if not the strong limb can be slowed by adding extra strng sliencer's...or by movingthe nocking point  towards the weak limb, which will in effect chage tiller, by changing finger position on the string....ohh yeah limbsaver's are amazing on bow's with no problems, that just by design shoot harsh....and they smooth, limbs with no problems, as well.

[jhansen]

The increased handshock along with the noise sounds like a clue.  Try heavier arrows and see if that doesn't cure the problem.  Your new limbs generate more energy.  Whatever amount of energy that isn't soaked up by the arrow has to go somewhere.  It can dissapate in limb vibration and handshock.  Just a thought.

John

[Colin123]

Thanks Guys, The tiller is fixed. I've contacted the manufacturer (Border in Scotland) and he says that the tiller should be between 0 & 5mm - it's 2mm. I'm shooting Easton Camo hunter 2215's with 125 g field points, so I tried a 2117 shaft which didn't really change anything, so I dropped the brace height to 6 3/4 inches & put on some Limbs Savers and, fingers crossed, that has solved it. I'll know for sure this Saturday when I go shoot. Once again, thanks for the advice

[Tom Anderson]

Rob,
Thanks for the explanation on how to check for proper tiller.