i thought a dual cam bow was a bow with a cam on each end of the bow and a single cam bow is 1 cam with an idler wheel. please explain a dual cam bow.
The simplest explanation is, that a dual cam uses a split yoke to anchor one end of the cable to the axle. A "Slaved Binary Cam" anchors one end of the cable to the opposite cam, and it runs on a reverse track, that feeds out cable as the bow is drawn back.
This reverse feed, prevents the cable from going slack, if one cam is pulled "harder" than the other.
The only exception, is the Bowtech Overdrive Binary cam. It uses a split yoke cable, anchored to a "crankshaft" that keeps the cams "slaved", for the last half of the draw.
- Not sure where I got this from.
It may be something that Copterdoc posted somewhere else here, or on another forum. Or it may have been written by someone else.
It is, however, a great explanation of the cam systems.
"Cam systems differ in the way they connect each other together and in the way they compress the limbs.
Cam characteristics differ, in the efficiency, shape of draw force curve, and let-off% they provide.
There are four basic cam systems.
(1.) Dual cam
(2.) Single cam
(3.) Hybrid Cam
(4.) Binary cam
A dual cam system, uses each cam, to pull the opposite limb tip towards it, by attaching it's cable to the axle of the opposite cam. Each cam pulls the other limb towards itself the same amount. If only one cam is turned by the string, the limbs are compressed the same amount as if both cams were turned. The only difference is, that one cable will be holding the entire load of the limbs.
A single cam system, compresses the limbs by attaching a single power cable to the top limb at the axle of the idler wheel. The single cam feeds the string off the string track below the nock, and off a reverse string track over the idler and above the nock.
A hybrid cam system, works the same way as a single cam, except instead of using a round idler wheel and one long shoot string, it uses an eccentric idler wheel, that is slaved to the cam, with a control cable. Instead of having a super long shoot string, it cuts the string in half and attaches the two ends to the eccentric idler wheel. The bottom cam and power (buss) cable is what actually compresses the limbs.
A Binary cam system, works the same way as a dual cam, except instead of attaching the cables to the axles, it attaches them to the opposite cam, so that as cable is reeled in by one cam, it is also being fed out in a lesser amount by the reverse track of the opposite cam. Since the cables are pulling both ways on each cam, one cam cannot rotate, unless the other cam rotates with it. If only one cam is rotated, the other will rotate with it, and they will both compress the limbs together, even if the shoot string is slack on one of the cams."
awesome!! i just learned alot!!! thanks guys!!
I had always shot dual cams until about 2004 I tried one of Darton's cam and half. Loved it, shot it for a few years with Dartons and Hoyts. Then bought a Matthews LX to hunt with. Found out a single cam ain't so bad either. Shot a Matthews Prestige in tourns. all last year. Not a bad bow either. For 2011 I got a Shadowcat, back to a sort of dual cam. So I've really don't have a general preferance. I can shoot them all badly:)
This thread convinces me even more to go with a hybrid cam when I get another bow.:D
And what is "cam and a half"? I know the other 4 types but this "one and a half" confuses me.