Brucelanthier and I were discussing an issue that I'm having with my bow after having it restrung and having new cables put on. When I went to sight it in I had to move the sight so far to the right to get it back on target that about 1/4" of the sight housing is out of view behind the riser. At first I thought it might be the switch to the heavier arrow setup, but I shot them at the old weight with no improvement. I did give the bow a close inspection and noticed that the idler wheel is leaning a bit. Putting a straight-edge on the left side results in the straight-edge being about 5/16" away from the string at the nock point. This means that the string, with the bow at rest is too far to the left. Would that result in my arrows impacting so far right of my original point of impact? I can't shoot through paper as I can't seem to find anything at all to use, which is really frustrating. So... I shot two arrows with broadheads, as Bruce suggested and two with field points. I didn't want to use my Slick Tricks because I wanted something with a bigger profile to increase the effect of any problem. So, I screwed on 2 G5 Montecs and spin tested them. I shot multiple shots at 20, 30 and 40 yards with the same results as below. The top two are at 30 yards and the bottom two are at 40 yards. Needless to say, the ones that are farther into the target are the broadhead tipped arrows. If you look close at the bottom two, the arrow on the left is almost touching a 1/2" black dot. I'd call that fairly decent for 40 yards with a broadhead. I might have done better had I not shot over 200 shots yesterday. Any suggestions besides taking it to the shop and having him take the lean out of the idler wheel (which I will do anyway)?
To get the lean out means replacing the idler wheel. IMO, cams, idler wheels, have some lean anyway and, as long as it is consistant, meaning everything stays the same shot after shot, then it is not a big deal. The only problem with yours, as I see it, is it is new and may get worse and it may get worse at the wrong time. If it were me I would replace the idler. It may be covered under warranty too.
When you say new, are you referring to the idler wheel? I believe it's four years old just like the bow. Ah well, I'll have him look at it, but if that's not the problem then I have no idea why it would shoot almost a foot to the right just because he re-strung it. Anyway, since I'm the original owner it should be covered under Mathews warranty. I mean, they replaced the cam free of charge after my son dry-fired it three years ago. Incidentally, the block target in the pic has been being used as a scratching post by my cats.
Ah, got it. It's hard to imagine that lean causing the arrow to fly so far to the right though. This is a mystery. Also, it seems to me that if that were the problem I'd be so badly out of tune that the fixed blades would have shot way off. I dunno. I'll have to have it checked out.
Just got back from the shop. The guy put a laser on the idler and according to the laser the thing is dead on. He is suggesting that maybe the idler was leaning before I had the new string put on and I was sighted in with that setup, and since he put a new string on and aligned everything I'm now shooting where I shoud be. I'm no expert when it comes to the mechanics of a bow, but it sure seems to me that I should be able to see my entire sight housing. However, my friend's Drenalin has the same issue and he's a great shooter. Since the only person within driving distance is telling me that it's fine and since it's shooting fixed blades beautifully I don't have much choice but to roll with it. Oh yeah. Shot it through paper at the shop and got three wing bullet holes. Go figure.
Pretty interesting, Johnny. I have seen a Matthews fine tuned by adjusting one side of the yoke. I guess this is a similar thing but a little more than a fine tune. If it's shooting the eway it should then you can't really ask for more. Thanks for the update. Now there is a little bit more info to file away.
