New string jig...

A forum containing tutorials pertaining to bowmaking tools - their use, maintenance, etc.

New string jig...

Jesenius
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Jesenius
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Joined: 21 May 2007, 04:18

15 Oct 2007, 07:55 #1

Hello All,
this weekend I have made jig for bowstring making. It can twist up to 8 strands at same time. Easy to use and result is very tight string. Disadvantage is, that must be used by two person, one to manipulate with jig and one for manipulate with twisted string. On second picture is final string I made for about 10 minutes. Not bad as first try, huh?

Regards, Jesenius.



enemy of my enemy is my friend.
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Mason Neck
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Mason Neck
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Joined: 01 Jul 2007, 04:38

15 Oct 2007, 13:14 #2

Dang. You're smart. That is an excellent simple design.
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Time tourist
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Time tourist
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Joined: 13 Oct 2005, 05:21

15 Oct 2007, 13:59 #3

I have never seen a jig like that. How does it work?

David
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Salvador6
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Salvador6
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Joined: 31 Jul 2005, 13:15

15 Oct 2007, 15:24 #4

You did a great job!

I've seen those jigs used to make rope. For a while I toyed with the idea of adopting one for bowstrings but it never came to fruition.

Now I use the battery powered hair twister (the secret weapon) which works on the same principle.
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OzPrimitive
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OzPrimitive
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Joined: 02 Dec 2005, 20:54

15 Oct 2007, 16:27 #5

No idea how it works but looks kewl.
OP
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stonefacescar
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stonefacescar
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Joined: 18 Apr 2004, 21:27

15 Oct 2007, 17:32 #6

The back board turns the cranks, and twists the strings that are looped over them



same rig we used in scouts to make rope, but it only had three hooks....

this is a cool conversion,!

Charlie
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mijn hobby
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mijn hobby
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Joined: 12 Jan 2007, 01:25

15 Oct 2007, 17:56 #7

Jesenius,

Cool apparatus
Maybe you could make a photo report of you showing how to use it, i have not figured out yet how it works.

Mark
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mijn hobby
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mijn hobby
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15 Oct 2007, 18:11 #8

I think i get it now!
Do you tie in the loop first?

Mark
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stonefacescar
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stonefacescar
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15 Oct 2007, 18:33 #9

Mark, the jig rotates the 8 hooks which have a double thread on each hook,( a double is caused, by looping the thread over the hook), and back to an anchor point,, each double thread is twisted to form a single thread, and all eight -8- wound double threads form the string, which is made up of the 16 threads, in all.......I think the loop is spliced into the end of the string, when done....is that right?

Charlie
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stonefacescar
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stonefacescar
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15 Oct 2007, 18:44 #10

Jesenius, do you use an 8 notch seperater, to adjust the twist tension in the final string, and keep the threads seperated,while they twist?...did it take two people to operate, one holding the seperator, and the other cranking? was the end string tied off to a post ,or door. etc. while twisting it?.....

Charlie
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Jesenius
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Jesenius
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Joined: 21 May 2007, 04:18

16 Oct 2007, 14:00 #11

Thanks for positive replies, jig is working exactly as stonefacescar shows on his picture. It's only extended to eight hooks which holds/twists strands to form desired string/rope. As a separator I used my fingers on hand, well I used only two strands at first try. With eight strands it's possible I'll have problem, I haven't eight fingers on my hand...

Mark, I'll shoot more pictures while it's in use to show you how it works.

Regards, Jesenius.
enemy of my enemy is my friend.
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stonefacescar
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stonefacescar
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16 Oct 2007, 18:51 #12

Here's a quick drawing of the seperator being used..I only put in a few of the threads showing, so it wouldn't get too busy to see,!



Charlie
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Jesenius
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Jesenius
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Joined: 21 May 2007, 04:18

16 Oct 2007, 19:26 #13

Hello all,
next I'll show you buildalong for 4-strand rope. I used shoelaces because I had not different colors strings for better view...

Well, first picture shows anchorage to door handle...


next picture shows other side with attached strings....



whole construction in use...



twisting started...



finished rope...





...and jig detail...



More and bigger pictures you can view on this link:

BowStringJig

I hope it helps you.

Regards, Jesenius.
enemy of my enemy is my friend.
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mijn hobby
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mijn hobby
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16 Oct 2007, 20:25 #14

Thanks for the great tutorial Jesenius, that helped a lot!
Nice results too!

Mark
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Jesenius
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Jesenius
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16 Oct 2007, 21:14 #15

Nice drawings Charlie, I think it helps a lot to others!

Jesenius.
enemy of my enemy is my friend.
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mijn hobby
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mijn hobby
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16 Oct 2007, 21:34 #16

Sorry Charlie, i got interrupted in my reply and forgot to thank you
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stonefacescar
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16 Oct 2007, 21:41 #17

Thanks guys,! it's really my pleasure to be of help......you did a good job on all that,Jesenius, nice going,!..... .

Charlie
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stonefacescar
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stonefacescar
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17 Oct 2007, 01:30 #18

Here's a gear driven set-up, for those mechanicly inclined, and have a shop with a lathe,,,it's gears keep everything ( all the hooks) syncronized,, the hooks can be soldered to the small gears, and those can be seated against washers w/grease,.if you're not using a motor on the bench, but holding a drill, it doesn't matter if there is slippage at the drive wheel, so a kid could hold the drill against the pully... the drive wheel can be made with a toy solid rubber wheel, held on the largest bolt that will fit in your drill, make a shim to fit the wheel snug,,then run a nut down tight, and then another one to lock the first.....put it in the lathe, (or drill, if you don't have a lathe) and shape it to fit the pully, if doing it by hand, you can hold it ,while it's running, against a running sanding belt, or disk sander , it doesn't have to be perfect, but close is good....if you are using a motor on the bench , mount it to a plate on a hinge,on a shallow block, and have a spring under it putting pressure on the pully.. this way you don't have to find belts to fit, and you can make the drive wheel smaller fo slower speeds,, it would be a good addition to have a reostat (sp?) for the motor and a foot or hand held controler, so you can move along with the spacer and operate the motor,,,,,,or the drill....and the weight with the pully keeps tension on,and gives slack, as the string gets shorter with the twists...........



Charlie
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Jesenius
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Jesenius
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Joined: 21 May 2007, 04:18

17 Oct 2007, 07:31 #19

Charlie, nice drawing again. I see You have fun with drawing drawings and I feel that this thread will end as small rope factory...

Jesenius.
enemy of my enemy is my friend.
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naguethey
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naguethey
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Joined: 29 Oct 2008, 05:13

24 Nov 2008, 07:10 #20

Really nice post guys, and some neat info.
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