I have a Gamma Progression ST II lock-out and am calibrating it with a digital luggage scale that many use.
I have tried testing the calibration using kevlar as well as RPM Blast and both exhibit creep in different ways of course.
My question though is at which point after the lockout engages is the calibration to be set - take the immediate reading or take a reading after a certain amount of creep? (which varies between strings of course).
An example: the lock out engages on the scale (visually) at 50-51 lbs, but then drops to (for example) 48 lbs by 30-60 seconds. If I do it again, it may drop to 49 lbs.
Should I calibrate for 50 lbs when it *immediately* locks out or should I calibrate at 30 seconds; or after a number of re-lock-outs when the test string can stretch no more (in this case meaning that if I calibrate to 50 lbs, the initial lock-out might read 52-53 lbs)?
Hope that makes sense, pretty obvious when it's in front of you of course.
----------------------------------
EDIT:
Having re-read what I have written, and though it through even further, it would seem that if I had a string with "no stretch capability at all", it would lock out at 50 and stay at 50 (except for maybe an initial very minor sitting back as it locks).
In theory if I keep re-tightening the same string until it can no longer stretch, arguably the lock-out would occur at 50 and the string would immediately remain at that tension.
Therefore, set tension to the initial lockout and/or re-pull the same reference string until there is no more give - in either case, the tension should be the same either way as creep is a string characteristic, not a calibration factor.
I have tried testing the calibration using kevlar as well as RPM Blast and both exhibit creep in different ways of course.
My question though is at which point after the lockout engages is the calibration to be set - take the immediate reading or take a reading after a certain amount of creep? (which varies between strings of course).
An example: the lock out engages on the scale (visually) at 50-51 lbs, but then drops to (for example) 48 lbs by 30-60 seconds. If I do it again, it may drop to 49 lbs.
Should I calibrate for 50 lbs when it *immediately* locks out or should I calibrate at 30 seconds; or after a number of re-lock-outs when the test string can stretch no more (in this case meaning that if I calibrate to 50 lbs, the initial lock-out might read 52-53 lbs)?
Hope that makes sense, pretty obvious when it's in front of you of course.
----------------------------------
EDIT:
Having re-read what I have written, and though it through even further, it would seem that if I had a string with "no stretch capability at all", it would lock out at 50 and stay at 50 (except for maybe an initial very minor sitting back as it locks).
In theory if I keep re-tightening the same string until it can no longer stretch, arguably the lock-out would occur at 50 and the string would immediately remain at that tension.
Therefore, set tension to the initial lockout and/or re-pull the same reference string until there is no more give - in either case, the tension should be the same either way as creep is a string characteristic, not a calibration factor.
Last edited:
