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Thread: Bow weight scales failure.

  1. #1
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    Bow weight scales failure.

    Should anyone have a set of Martin electronic bow scales set up on a draw board or hanging vertically to test draw weight /cam timing, check your O ring! Especially if you've had it for a while.

    Here's mine after failure. This was permanently fixed to a D shackle and in turn to a fully closed eye bolt (in 50 cm wooden support beam).



    Unfortunately this failed when I had the bow at full draw, derailing the string off the cams. Nearly **** myself when it happened. Getting the bow checked out Tuesday.



    Sent from my iPhone using Tapatalk

  2. #2
    Slowly improving Brenton's Avatar
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    Good warning.... I suspect that as these sell for about $6 delivered.. that the quality is not great.
    I can't imagine that the martin logo makes them any stronger.
    http://www.ebay.com.au/itm/0-01Gx40K...YAAOSwnHZYhuBS

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    Sounds like the scales are like the Martin company stuffed
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    Grand Master Bowman scott p's Avatar
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    I don't have much faith in the top loop of any of those scales. I will be knocking the ring out of my LCA ones and fitting a small carabiner that I can see and trust.

    personally, as soon as Amazon start Australian operations I am buying a decent load cell like this. https://www.amazon.com/American-Weig.../dp/B00186R2UG

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    http://www.ebay.com.au/itm/Mini-Cran...cAAOSwdzVXrTNm

    I just got these for my drawboard. Scott, very solid just swapped out the hook for a carabiner
    My wife will never leave me, She would hate to see me HAPPY

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    Grand Master Bowman scott p's Avatar
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    wow, that's awesome value. thanks, I've just grabbed a set. they can do double duty on my draw board and on my string jig as stretching scales.

    I notice they are really, *really* trying to dissuade people from going the express post option.


  9. #7
    *****istrator Marcus's Avatar
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    Seems reasonable for Australia Post

    Quote Originally Posted by scott p View Post
    wow, that's awesome value. thanks, I've just grabbed a set. they can do double duty on my draw board and on my string jig as stretching scales.

    I notice they are really, *really* trying to dissuade people from going the express post option.

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    Last Chance Archery have introduced a new scale that might be worth checking.
    I haven't had one in hand but if it is up to the standard of their presses and fletching jigs is should be good.
    They also have a hand held one.
    http://lastchancearchery.com/shop-1/lca-bow-scale-new

  12. #9
    Grand Master Bowman scott p's Avatar
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    that handheld one looks really good - you can't hold their hanging scales by the housing to use by hand.

  13. #10
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    I looked for a considerable length of time for a set of scales with a peak weight function that didn't require a few seconds of holding.
    I found them about three years ago.
    The only issue that I've found with mine is that the screen behind the readout moved, so I opened the unit and glued it in place.
    It is the only reasonably priced scale I've found so far which has the ideal characteristics for measuring bow peak weight.

    Hook bow on, draw bow down, release and read peak weight.

    Repeat three times to check.
    Mine turned up for less than 36 dollars total.

    http://www.ycscale.net/16/hanging-cr...-hanging-scale
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    Looking into the scales Scott posted the link doesn't mention anything about auto hold. But another matching scales entry in eBay does specify these scales as having that ability. Not sure if there's any minor difference between them that would explain one having that feature but the other doesn't.

    http://www.ebay.com.au/itm/Mini-Cran...cAAOSwdzVXrTNm
    http://www.ebay.com.au/itm/Mini-Port...kAAOSw-KFXdfIn

    Then there's these:

    http://www.ebay.com.au/itm/Butchers-...cAAOSwcF9UYcrT

    These also have the auto hold feature. I slightly favor this one more as the clip seems more recessed into the body. Tthe D shackle of the first scales wouldn't seem to allow a carabiner to fit the required width where the shackle bolt goes through, which could pose a problem for use on a horizontal draw board given it has to slide along the 'T' as you draw the bow back.

    Both types have multiple entries in ebay for varying amounts depending if buying locally or from Asia.

    Big Tony, Scott - can you provide any further experience with yours?

    Andy - care to chime in what you think of these? The one you linked I haven't found available on eBay, yet to check Amazon.

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    *****istrator Marcus's Avatar
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    Personally I think this illustrates not to take our bows, or equipment for granted.
    I always run an arrow in my draw board, and as such I always make sure should it release that there is nowhere that arrow can go that is dangerous.
    Scales break
    DLoops break
    release aids break
    Hooks break
    Ropes break
    pegs break

    Working in a shop makes one extra cautious because chances are, its happened to us.
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  17. #13
    Grand Master Bowman scott p's Avatar
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    Quote Originally Posted by Skitso View Post
    Big Tony, Scott - can you provide any further experience with yours?
    will let you known when they arrive, worst case scenario is they end up permanently on my string jig.

  18. #14
    digitus impudicus
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    Quote Originally Posted by Skitso View Post
    Andy - care to chime in what you think of these? The one you linked I haven't found available on eBay, yet to check Amazon.
    The documentation on most of them indicates that they have an auto hold, rather than a peak hold.
    The difference is generally that it expects a stable weight for a few seconds.

    Not impossible to use, but just annoying. I'm pretty sure that flyingwatchmaker has one of these ones already.
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    2nd Class FlyingWatchmaker's Avatar
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    Yup, though I specifically wanted it not to hold, just to stretch strings with (which works quite nicely) I haven't noticed that will hold, even when it has a stable weight, though it does have an auto-off which is convenient!

    Tom

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    Conscioulsy incompetent ADO15's Avatar
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    Quote Originally Posted by Marcus View Post
    Personally I think this illustrates not to take our bows, or equipment for granted.
    I always run an arrow in my draw board, and as such I always make sure should it release that there is nowhere that arrow can go that is dangerous.
    Scales break
    DLoops break
    release aids break
    Hooks break
    Ropes break
    pegs break

    Working in a shop makes one extra cautious because chances are, its happened to us.
    Absolutely - A while back I was working on a form issue in my lounge room using the Trainer Lock feature on a Stan thumb button and the below was the result.
    Annoyingly I has just painted that wall only a few weeks before
    Fortunately I was home alone and was able to hide the evidence

    Name:  whoops.jpg
Views: 249
Size:  126.7 KB
    All bleeding stops... eventually.

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  22. #17
    Grand Master Bowman Ozzy's Avatar
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    Quote Originally Posted by ADO15 View Post
    Absolutely - A while back I was working on a form issue in my lounge room using the Trainer Lock feature on a Stan thumb button and the below was the result.
    Annoyingly I has just painted that wall only a few weeks before
    Fortunately I was home alone and was able to hide the evidence
    As did one our club members during demonstrating the compound bow to beginners in our clubhouse, using a Stan trainer lock
    In his case, no arrow, however his brain activated into releasing the Stan.
    Derailed bow, release aid striking the riser.
    Rather nasty.
    Style before fashion

  23. #18
    Grand Master Bowman scott p's Avatar
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    Quote Originally Posted by ADO15 View Post
    the below was the result.[/ATTACH]
    arrow assembly technique is good though - the core is still attached to the point shank.

  24. #19
    Conscioulsy incompetent ADO15's Avatar
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    Quote Originally Posted by scott p View Post
    arrow assembly technique is good though - the core is still attached to the point shank.
    Yes... that 5cm of shank had about 10cm of arrow shaft on it.
    All bleeding stops... eventually.

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    Quote Originally Posted by ADO15 View Post
    Absolutely - A while back I was working on a form issue in my lounge room using the Trainer Lock feature on a Stan thumb button and the below was the result.
    Annoyingly I has just painted that wall only a few weeks before
    Fortunately I was home alone and was able to hide the evidence

    Name:  whoops.jpg
Views: 249
Size:  126.7 KB
    I am very curious to know how this happened, did the pin shear?

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