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Montalaar
12-04-2010, 07:58 AM
Hey friends.

I got a question regarding cables on my ShadowCat.

As you know i made a new set of them for my bow and put them on today. Unfortunately i had only .024" serving yarn but hey, should not be the problem - i thought. The cables are not way thicker than before but they rub on the modules on both cams. I checked them with the drawboard and got the result that i have massive clearance problems.

I tried to correct that by moving the cable slide out of the way. Well.. That COULD help. But i'd need to move that one out for around .. 1" to solve the problem. So now is my question...

Is it possible that there is no other way to get rid of the problem than making new cables with other serving (will take green then as i only have .024 orange) and less strands? :/

Hutch~n~Son Archery
12-04-2010, 09:16 AM
Nothing I can think of Montalaar off the top of my head to help. How many strands of string did you use? What material did you use? What serving did you use? this might help me understand how to help.
Hutch

Montalaar
12-04-2010, 10:19 AM
See 'green strings' thread as reference.

Cables:
20 strands 452x, .024 halo serving

String:
20 strands 452x, .024 halo serving and .018 center serving

---

A friend of mine asked me why i use 20 strands for cables. My answer is that i want the added strength with my draw of 32".

Hutch~n~Son Archery
12-05-2010, 01:44 PM
According to what you are showing here there shouldn't be a problem. Unfortunately I'd have to see it, to figure it out. But maybe some of the others have an idea.
Hutch

Spiker
12-06-2010, 05:41 AM
Simon-
I measured the diameter of the served part of a bunch of my strings, both custom sets and factory, and they are all very close to 2.5mm.
If yours are 'fatter' than that I can see where it could cause a clearence issue at the mods. Especially at the bottom cam.
My Nemesis and Alien Z have quite a bit of clearence there but the Alien X and Firecat just barely clear with the 2.5mm diameter cables.
You may have to reserve with smaller diameter Halo or drop a couple strands on the cables.

Montalaar
12-28-2010, 12:00 AM
Bump.

I worked on my Cattow yesterday. I replcaed thee of four cable servings with ultra thin Brownell serving yarn. This is the thinnes yarn i ever got and if this wont work there is no solution.

What changed?

Top Cam does not rub any longer at the cable. Bottom cam has a slight amount of rubbing but i guess i had this before, too. I replaced the original slide with an older limbsaver one. Or something else. I cannot remember where i took that from. It pulls one cable (from the bottom cam) a bit farther away.

But here is ONE thing that might be interesting for ALL of you:
I found out that a thicker serving affects cam timing a lot. After changing the serving thickness i could get 0.2" more draw out of the cam with the same timing and lengths. A thinner cable does come into contact with the module later but ALSO changes the whole cam timing.

You may all know that there is a post where the cables that feed into the module are connected to. When drawing the bow up to 32" the thick cables had to move PAST this post. With the thin cables the Cam comes to rest around 1/3" before the cable even comes into contact with this one. Amazing, hugh? ;)


I will see if i can draw a picture with you. But i am still waiting for my Adobe Design package to arrive. I ordered it before Christmas and it still did not show up.

alex
12-28-2010, 07:17 AM
It's good to know that in case i grow 25cm up and need a 32" DL :rolleyes: Now serious, Simon, how thin is this ultra thin serving yarn? I can't understand how some microns can cause such a difference. That's quite interesting.

Montalaar
12-28-2010, 07:32 AM
I'd say it is a 0.13 or 0.11 yarn instead of the 0.22 i used before.

I found that very intersting myself. I replaced every serving and checked timing and rubbing after each one with the drawboard (i really love this tool now..) and every time i got a little bit different rotation. Meaning: Every time i had less cam rotation with the same amount of draw length,

Spiker
12-28-2010, 05:32 PM
Actually that does make sense!

elkslayer4x5
12-29-2010, 07:09 AM
is WHY 20 strands? What is the draw weight on that Shadowcat, Simon? I hope that you take no offence at what I'm going to say, but are you making bow strings or tow ropes. :D

Montalaar
12-29-2010, 08:33 AM
I shoot 60 lbs.


But keep in mind that i have a draw of 32". That leads to an exorbitant increase of stress in the cables.

I'd use 18 strands or maybe even only 16 strands with less drawlength. But i had so many limb problems that i wont risk anything (although i have a set of spare limbs now..)

Spiker
12-29-2010, 03:46 PM
Back to this for a moment: "But here is ONE thing that might be interesting for ALL of you:
I found out that a thicker serving affects cam timing a lot. After changing the serving thickness i could get 0.2" more draw out of the cam with the same timing and lengths. A thinner cable does come into contact with the module later but ALSO changes the whole cam timing.

You may all know that there is a post where the cables that feed into the module are connected to. When drawing the bow up to 32" the thick cables had to move PAST this post. With the thin cables the Cam comes to rest around 1/3" before the cable even comes into contact with this one. Amazing, hugh?"
Take a really thin piece of string and a really fat piece of string. Make sure both are of some sort of material that will not stretch. Now cut them to identical lengths - say 6". Now start one end of each at the same spot on a tin can or something and wrap them around it.
The ends dont come out at the same spot.

Hutch~n~Son Archery
12-29-2010, 05:00 PM
Nicely explained Spiker.

Hutch

Montalaar
12-29-2010, 10:44 PM
Yeah, good explanation Spiker and i must commit that it was really obious. The thing that bothers me is:

I get the same amount of draw with thin or thick cables. The Cam just has a weird cam rotation with the thick one...