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Re: [JimTitt] Re:Sewing your own slings:
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tugboat
Jul 24, 2011, 6:46 PM
Views: 11934
Registered: Jul 19, 2011
Posts: 106
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Agreed.... bartacks are not essential. Indeed in several ways that are not ideal. But they do have favourable characteristics for both the customer (from the companies vantage/liability) and from the manufacturer's side in terms of production. You need a tacker with a large field if you want do a programmed 5 point riser type pattern. Or if you want to do the riser pattern and dont have a capable tacker you would have to do it by hand. But in terms of pure load dispertion and fabric integrity a 3 or 4 point riser stitch or just the straight row stitches (given narrow webbing) is technically better (if you weed out specific other factors that donbt have to do with strength). Spectra fiber might introduce exceptions to this rule, given its low coeffcient of friction,....thus a tack is nice to lock up that warp and weft tight. Sewing the slings by something other than a tacker is time consuming and may, i repeat 'may', lack the quality control of a tack. One can get a single tack machine, get a jig built and be off to the races (well, not quyite that easy, you get the drift). It takes more skill to learn good 'riser' type sewing vs tacking in my opinion. And therefore it takes more teaching/learning for the company. I think if people wonder about the commonality of the bartack, it may help to know that it orginallly came from the blue jean industry/ garment industry (correct me if i'm wrong...but quite sure im correct), and then was picked up by the climbing community for its production qualities. Indeed, my first mechanical tacker was for the garment industry that ran a cam for pattern. Then you received the machine and had to "tweak" it for climbing sewing; decrese rpm (new clutch/motor pulley diameter, enlarge needle plate hole, bigger needle, retime cam, etc). The new electronic tackers are a Godsend. But the old tackers sure taught you alot whether you liked it or not!
(This post was edited by tugboat on Jul 26, 2011, 7:08 PM)
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Edit Log:
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Post edited by tugboat
() on Jul 24, 2011, 6:55 PM: spelling noob
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Post edited by tugboat
() on Jul 24, 2011, 6:56 PM
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Post edited by tugboat
() on Jul 26, 2011, 7:08 PM: i meant "you" do need a large field...
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