Crossbow Nation banner
1 - 20 of 22 Posts

·
Incurable Tinkerer
Joined
·
5,031 Posts
Discussion Starter · #1 ·
So, I'm finding that my endless loop strings are shorter after they are served than when I laid up the strands on the jig. When I lay the strands to the spec of the bow , say 38.5,'' then serve the entire string, as Mission does it's stings and cables, the string is shorter than 38.5," by at least 1/4". a) does it matter and b) are others having the same outcome and what are you dealing with it?
 

·
Registered
Joined
·
1,470 Posts
I assume that your layout length generally allows for tension, twisting, stretching time, and tensioning again while serving.

a.) Unless the 1/4" stretches out during a shoot-in period, it could have an impact on the limb stresses. Would it matter? IDK I would think that it depends on the bow.

b.) How I would handle it, add a 1/4" to your layout length at the beginning to account for this. Part of the process on knowing what to do to create spec strings.
 

·
Incurable Tinkerer
Joined
·
5,031 Posts
Discussion Starter · #4 ·
I assume that your layout length generally allows for tension, twisting, stretching time, and tensioning again while serving.

a.) Unless the 1/4" stretches out during a shoot-in period, it could have an impact on the limb stresses. Would it matter? IDK I would think that it depends on the bow.

b.) How I would handle it, add a 1/4" to your layout length at the beginning to account for this. Part of the process on knowing what to do to create spec strings.
Thanks. I made lots of Flemish strings and learned to accommodate doing so. But ELs are relatively new to me. Guess it's gonna be trial and error again with this process too.
 

·
Registered
Joined
·
76 Posts
Since this is a string subject, I will toss in a question. I recently bought a string/cable set from a company that had never built strings for the Sub-1XR. I gave them the lengths and they sent me the product. Looks good but haven't installed yet. Noticed that the strings center serving has not been double served. So, the serving as is measured .130" and serving on old string measures .165". What problem could I have if I shot with the smaller diameter serving?
I have published this on Mission cite also.
 

·
Registered
Joined
·
9,903 Posts
I would prefer my strings and cables to be a 1/4 inch shorter than stock . less twists to get ata,room for stretch and easier to advance cams.
Short strings and cables with less twists tend to cause servings to slip imo. All of the strings I have got from 60X have servings sliping do to lack of twists imo. Servings get tighter as the string is twisted. I've never had a problem advancing cams with the correct string length. I've never had a string stretch so far it couldn't be corrected with twists either. jmo
 

·
Registered
Joined
·
9,111 Posts
Servings get tighter as the string is twisted.
I’ve found that the serving will only get tighter when twisted is when it is served “opposite” to the string's twist. I even made a Youtube video that shows this.
.
 

·
Registered
Joined
·
9,111 Posts
Here’s my video. The string is twisted CCW, the orange “serving” is CW. As I add additional CCW twists to the string, the ends of the orange start closing together and the one on the right catches up and goes past the other one after a few twists - and is tightening.

I had seen a Randy Ulmer clip years ago before I ever got a crossbow, and he stated you should see which way your bow wants to impart spin on a bare shaft at a short distance. My PSE put CCW spin on a bare shaft. All my arrows were fletched RW which rotated the shaft CW. I reflected 4 arrows LW, and they grouped better than the 4 RW arrows. I stripped every arrow and reflected them LW.

When I got into crossbows I found that all my crossbows imparted CW spin on a bare shaft. Later I found out that serving applied CCW will impart a CW rotation on a bare shaft. I posted that on CT and people laughed. Huntingster joined the conversation and confirmed what I said was correct. The crowd went silent.

Since all my Tapps that I do myself or get from Jerry is fletched with a RH offset, this imparts CW spin on a bare shaft - and is the same direction CCW serving imparts on the bare shaft as well.

Contrary to some of the so called string experts, I would prefer a CW string with CCW center serving - to me it looks like it should be served that way anyway. If I ever have to add a twist in the future - I will be tightening the serving instead of loosening it.

I’m pretty sure Boo serves opposite of the so called “norm” as well - at least that’s what his video looks like to me.

 

·
Registered
Joined
·
9,111 Posts
Here’s what you told me:

"You are going by standing behind the string while serving.

If starting from the right side facing the string clockwise will be coming towards your body and over the string. From the left side away from your body and over the string”.

That seems to be the opposite from this video. Only one is correct. The serving portion starts at about 29 seconds.

 

·
Registered
Joined
·
16,636 Posts
Here’s what you told me:

"You are going by standing behind the string while serving.

If starting from the right side facing the string clockwise will be coming towards your body and over the string. From the left side away from your body and over the string”.

That seems to be the opposite from this video. Only one is correct. The serving portion starts at about 29 seconds.

That is exactly what the illustration shown says. Quit looking down the string and stand behind it.
 

·
Registered
Joined
·
9,111 Posts
That is exactly what the illustration shown says. Quit looking down the string and stand behind it.
Evidently we understand English differently.

You say: right to left, coming towards you, going over the top.

The video: shows right to left, going away and over the top.

How is that exactly the same?
.
 

·
Registered
Joined
·
9,111 Posts
Not going to argue with you Tim. You are always correct no matter what. Satisfied now?
All I’d like to know is whether the method you described above is the same as the illustration in the video?

It’s a simple question.
.
 
1 - 20 of 22 Posts
This is an older thread, you may not receive a response, and could be reviving an old thread. Please consider creating a new thread.
Top