HuntingNet.com Forums - View Single Post - Where have we seen the Binary cam before? Oh yeah, thats right...
Old 12-09-2004 | 08:26 AM
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Ratus
 
Joined: Feb 2003
Posts: 86
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From: NM USA
Default RE: Where have we seen the Binary cam before? Oh yeah, thats right...

I'm sorry but I've seen way too many Onieda's that came in the local shop to be re-timed over the years to believe this.

My understanding of the Equalizer Binary Cam System is that it is completely tied together with its harness and for the timing to be thrown off one cables would have to be grossly longer than the other which could only be done pretty much out of ignorance.

I found and copied the text below from another forum and it seems to be a bulletproof system.


Question: How is it different from other systems? Answer: It is different in a number of ways. 1) For each of the two power cables, there are two eccentrics. One takes up cable and one lets out cable, therefore, each cam's ability to store energy is the function of two cable eccentrics instead of one. This is unique to the Equalizer. 2) No cable is attached to the limb axle in any way, shape, or form. The two cams are only tied to each other. This is only true in the Equalizer design. 3) The Equalizer isn't like a cam 1/2, which doesn't use symmetrical cams and has only one power cable. The Equalizer has exactly symmetrical cams and uses two power cables. Exactly symmetrical cams are balanced the same, and make controlling the feed of the upper and lower portions of the drawstring a slam dunk. Balanced cams and matched feeds mean perfect nock travel. 4) The Equalizer IS a modified dual cam. It is different from a dual cam in that it never operates on a power cable journal lever shorter than about 1.125", and this lever is distributed across both cams for a functional lever of 2.25". A conventional dual cam power cable uses a lever of about .100" at full draw. Consequently, if one cable is longer than the other on a dual cam bow to cause one cam goes out of time by 5.7°, the same variation on the Equalizer causes a rotation of .51°. In order for cable length to cause a timing issue, one cable would have to be severly damaged or twisted (or broken). Also, a conventional dual cam lever is short enough that the cables actually lose control of cam rotation to string influence. This is what causes a conventional dual cam bow that is timed at brace height to go out of time at full draw (double valley). It is also the reason for "creep" tuning.

How is cable lean dealt with? 1)Like a single cam, there are three tracks on an Equalizer cam. Two of the tracks belong to the power cables and one belongs to the string. Because the cams can't go out of synch, the tensions on both power cables are identical at all times. This is different from the tensions applied to single cam systems. Tensions on the three cables anchored to a single cam vary somewhat independently of each other. The tension on the drawstring varies as the bow is drawn, so there is some shift of forces along the bow's axle, and there is some lean. But...the lean is considerably less than you would see on a single cam. If you don't believe it, go look. By placing the string tracks strategically along the axle, cam lean has been reduced to the point of being negligible. 2)Cable guards don't cause much cam lean except on split buss anchors. When cables are anchored near the center of the axle, cam lean is primarily a function of cable and drawstring tensions.
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