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-   -   Wise Tensioner Accuracy/Repeatability? (http://tt.tennis-warehouse.com/showthread.php?t=441450)

WileyCoyote 09-28-2012 12:23 PM

Wise Tensioner Accuracy/Repeatability?
 
I would be very interested to find out if anyone using a Wise Tensioner or other electronic constant pull tensioner has checked the accuracy and repeatability of the devices.

What I am looking for is someone who has installed an accurate digital test scale that the tensioner has pulled against and what the results were. How close does the tensioner repeat the pull each time, does the test scale match what the tensioner says and so on?

For instance, I have read that some of the Babolat tensioners overpull a fixed amount and then release back to a reference tension. Does anyone have actual measurements on what actually happens and how close it repeats?

And confirming that these tensioners are truly constant pull as well.

My understanding is that the overpull on other tensioners is called prestretch sometimes. Correct?

Thanks in advance for your help.

Harry

seekay 09-28-2012 01:43 PM

The luggage scale I use for calibration is on the cheap end, but I trust (and have tested) it to be good to the nearest pound.

Whenever I test my Wise, it pulls right to the programmed in reference tension and holds there, exactly like I want it to. If I connect the scale to the tension head with a soft poly that relaxes under tension (e.g. ISOSPEED Baseline), the Wise will continue pulling as it relaxes to keep the tension right.

There's some minor fluctuation as the string relaxes and the tension head pulls a tiny bit further to bring it back into the ideal range, but it's always close on the scale and appears to match the readout on the Wise.

Irvin 09-28-2012 02:05 PM

My wise usually drops about 0.2 lbs befor it pulls again then I have about 0.1 lb overshoot over and over. It is very close to what I see on the Wise readout.


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