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View Full Version : Cam timing (again)



Ehunter
03-29-2011, 03:29 AM
Just got my new Onza Saturday, and have been getting it set up. The cam timing was way off, so I started twisting up the cables. For some reason, I can't get the bottom cam to advance with the top cam. Top cam is hitting flat well before the bottom. I put a twist or two in the bottom cable that feeds into the top cam, and get close, then add one more, and it gets further off again. Would it be the same thing if I took a twist OUT of the cable feeding into the bottom cam, as it is twisting INTO the top cam? Wondering if this might make the difference I need. ATA is 33 3/4, BH 7 3/8 It's just not making sense acting the way it is.

bfisher
03-29-2011, 03:35 AM
Yes, you can do that. You might also try just a half twist once you get really close. Then once you have the cams balanced if you need to adjust the draw length a touch you can twist/untwist the string accordingly.

Ehunter
03-29-2011, 04:02 AM
Thanks Barry. For the life of me, I can't figure out why it's acting like this. Just doesn't make sense. I've had no problem timing any of my other Martin's. Logic, and mechanics, say that twisting the cable up the same way each time should make it move in the same direction each time, but that's not happening. Good thing I like tinkering. lol

bfisher
03-29-2011, 04:26 AM
Maybe you just need a reminder. The cam that is hitting the flat spot of the module first is the one you shorten. Or untwist the other one. We all have brain farts once in a while. Another thing to think about is that the tighter a cable is already ywisted means it will react more to added twists. These agressive cam can react very quickly to one twist sometimes. They can be a real pain sometimes. That's why it's sometimes advisable to take twists out of the opposing cable; makes them a little less sensitive.

archerx7
03-29-2011, 04:59 AM
The best thing to do with any new bow is to remove the string/cables and meaure them and set them to factory specs before trying to time the cams or do any type of tuning.

Once set to factory specs, you'll find that the timing is very close, usually no more than 1-2 twists to get it right on. Be sure to measure in from the ends of the mods 1/2" and make reference marks on each mod, this will give you a solid visiual point of reference when timing the cams.

Ehunter
03-29-2011, 10:08 AM
Thanks guys. I finally got it to time right this morning. Both cams dead on now. ATA is 33.5 BH is 7.5. Ended up having to twist both cables to get it to line up for some reason. Now if I can just get rid of this damn flu bug I caught so I can go start shooting it. Turkey season opens here on the 1st for archery. Runs through the 31st. of May though, so I have time. Thanks again for the advice!