Calibration

[Marc The Shark]

Quick question.. Everyone told me to just get a fishing scale to check the calibration of my stringer... I don't really need a scale that weights up to 100 lbs do I? Since the 50 lbs digital scales are cheaper I could just calibrate it at like 40-45 lbs and it would be safe to assume that if I crank it up to 60 or 55 it will be correct??? no?

 

[star 5 15]

no because your not pulling tension in the range you should calibrate at 10kg 25kg and 35 or 40kg. get the calibrator that is on g r a n d s l a m s t r i n g e r s . c o m

 

[Mastadon_10S]

no because your not pulling tension in the range you should calibrate at 10kg 25kg and 35 or 40kg. get the calibrator that is on g r a n d s l a m s t r i n g e r s . c o m

search my threads and you'll find a good calibrator, it is the same one the G S S sells.

 

[SW Stringer]

Quick question.. Everyone told me to just get a fishing scale to check the calibration of my stringer... I don't really need a scale that weights up to 100 lbs do I? Since the 50 lbs digital scales are cheaper I could just calibrate it at like 40-45 lbs and it would be safe to assume that if I crank it up to 60 or 55 it will be correct??? no?

A fifty pound "calibrated" scale will do the trick. Check your machine at several points up to and including 50 lbs. Plug the numbers into a linear regression function (Excel has one) and print out a chart of reference tension versus actual tension. Once the linearity of the tension head is established at several points at 50 lbs and below, the chart will be dead on accurate at all points above 50 lbs.

A "calibrated" scale is one in which you did the above procedure (on the scale) with certified weights. You can certify weigh plates from a changeable weight bar bell set at the post office. The self service center at my local post office has a scale that weighs up to 30 lbs at .01 lb accuracy so you can weigh plates up to 25 lbs easily. The grocery store scale at all checkout lanes also is extremely accurate.

If you're not concered with that last ounce of precision, a digital fish scale, right out of the box (ie - un-calibrated) is still accurate enough for the job.

 

[StringingIrvine]

i just got my alpha revo and just got my fishing scale calibrator from gss. When i pull tension at 55 i can see it spikes at 55 then immediately drops to around 48. Should i have it so it levels out at 55?

My machine is less than 1 week old, i thought alpha machines came calibrated? Has anyone had to calibrate their alpha machines upon receipt?

 

[dancraig]

just got my alpha revo and just got my fishing scale calibrator from gss. When i pull tension at 55 i can see it spikes at 55 then immediately drops to around 48. Should i have it so it levels out at 55?

My machine is less than 1 week old, i thought alpha machines came calibrated? Has anyone had to calibrate their alpha machines upon receipt?
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If it locks out at 55, that is correct. The drop off is from the string stretch. Make sure your clamps and gripper are not slipping. Now you see the difference between a lock out machine and a constant pull machine.

 

[dancraig]

i just got my alpha revo and just got my fishing scale calibrator from gss. When i pull tension at 55 i can see it spikes at 55 then immediately drops to around 48. Should i have it so it levels out at 55?

My machine is less than 1 week old, i thought alpha machines came calibrated? Has anyone had to calibrate their alpha machines upon receipt?

Test it with some stiff poly in the calibrator, you shouldn't see that much drop off with the poly. If you do, double check the clamps or gripper for slipping. Tighten them up if needed.

 

[Marc The Shark]

Quick question about calibrating.. Since I've read a lot about stringing ~10% tighter on lock outs, here's an idea..
Let's say I want to string my racquet at 60 but since you get the drop to 54 ish could I just crank up the lbs on the tensioner and calibrate so the setting for 60 is actually 66 so that once it locks and drops the tension will be down to 60? Or would that be bad?

 

[StringingIrvine]

Quick question about calibrating.. Since I've read a lot about stringing ~10% tighter on lock outs, here's an idea..
Let's say I want to string my racquet at 60 but since you get the drop to 54 ish could I just crank up the lbs on the tensioner and calibrate so the setting for 60 is actually 66 so that once it locks and drops the tension will be down to 60? Or would that be bad?

Thats what i was thinking, but then there might be problems when someone asks for 55 and their prior 55 was on a lockout and you do on your constant pull machine and your pulling at 60. Did i make sense? Its been a long day at work.

 

[Marc The Shark]

Well I don't have constant pull machine. but if you set it the way I said... on your dial and in reality you would set it to 55.. But if you hooked up a scale to it the initial pul would be slightly higher... 62ish but should drop to 55 if the concept is correct..
I hope IM making sense cause it has been a long day as well

 

[StringingIrvine]

Well I don't have constant pull machine. but if you set it the way I said... on your dial and in reality you would set it to 55.. But if you hooked up a scale to it the initial pul would be slightly higher... 62ish but should drop to 55 if the concept is correct..
I hope IM making sense cause it has been a long day as well

yeah that makes sense and thats what i was talking about too.

the problem part comes in if someone had their prior job on a normal lockout and they were at 60 and requested 60 (not knowing that prior their 60 was only 55) and you did it at 60 (on your upped calibrated machine) it would be diff.

 

[StringingIrvine]

Well I don't have constant pull machine. but if you set it the way I said... on your dial and in reality you would set it to 55.. But if you hooked up a scale to it the initial pul would be slightly higher... 62ish but should drop to 55 if the concept is correct..
I hope IM making sense cause it has been a long day as well

yeah that makes sense and thats what i was talking about too.