Spoke Tansiometer Park TOOL TM-1

[kavitator]

How with this simple tensiometer get really correct spoke tension?

Park tool said you must release it very gently...but if you little move it datas are little lower than from first readings (22 in first...21 or 20 in second if it is moved slightly)

And its mechanism at scale (white plastic "roller")...if you little lift it from downside when its mesauring spoke also drops slightly (friction of mechanism?)

On how long it must be recalibrated?

Thanks

[bricky21]

Yes the park TM-1 can give a slightly inconsistent readings just like every other measuring device know to man. I don't rely on the tool to tell me when tension is exactly a certain number. After a while you get a feeling for when the spokes have enough tension in them to keep from going slack, so an absolute tension number is not all that important. Even tension between all of the spokes is the key, and that is where a simple tool like the TM-1 comes in handy. Just try and use it the same way for each spoke and you'll be fine.

[stella-azzurra]

Use the tool as a guide after you have tensioned the spokes. Use it in the final tension to get everything close.

[kavitator]

Everything for perfect wheel.

i like nice round circle graph from wheel

thanks for tips

also i found this intresting theme about perfection tesntion

http://forums.mtbr.com/wheels-tires/opt ... 780-3.html

[stella-azzurra]

Check out some of the youtube clips it helps to actually see it

[kavitator]

OK what is with conversion table?????

On internet new (wich also include 1.4 roun steel spoke - superspoke sapim) is little different.

Like for 1.5 round steel spoke:

MY original white blue conversion table has

readings 20....129kg

new on internet on park tool site:

readings 20.....148kg


Is different series of tensiometers out?

So i keep with my original conversion table?

[stella-azzurra]

I have the TM-1 meter and it came with a conversion table which is the same as the one on line here http://www.parktool.com/documents/ee5fb ... a74bf0.pdf

How old is your meter? I got mine last year.

I would guess you can use the conversion chart you have with your meter since it was made for your meter.

Contact Park tool and ask them your question.

[bricky21]

The chart that Stella linked to is not the same chart I got with my TM-1. I have the white and blue chart that you have which converts 20 to 129 k (1.5 round). I have to believe that the new chart is from some sort of new method of calibrating or adjusting how much the tool can deflect As Stella suggested you should send an email to Park and then let us know what they say or copy and paste there response back here .

[stella-azzurra]

What I got in the box that the meter came in was that chart you saw on-line plus a small gauge to check spoke diameter size. That's the chart I use to tension the spokes to unless the rim manufacturer specifies otherwise.

[kavitator]

i have tensiometer for about 2years.
I have blue white table. Maby different spring is used in new one.
Yesterday i emailed to parktool .

http://shrani.si/f/2Y/13n/MwHfihp/img3678.jpg


is it 2009 series?
http://shrani.si/f/2/R3/1NcBULzr/img3679.jpg

[stella-azzurra]

Mine is 2010 but it's exactly like the 2009 series.

That's why I said to use the table that your meter came with it's could be a different tension spring being used.

Although 100kgf is 100kgf not which way you look at it.

[woz9683]

They've changed the chart at least once in the past couple years. I got one in 2010 with the older chart, and a buddy got one last year with the newer chart. The units are functionally identical though (slightly different blue anodized color though), just the chart has changed. The two charts give different conversions, and the two units give different readings, but the bottom line for me is as stella-azzurra said: as long as the tensions using my meter are nice and even across all spokes at the end of the build I don't really care if the actual tension is 100kgf or 120kgf.

[kavitator]

I just get the ansewer from park Tool.
-------------------------------------------
Hello
We have made a shift in the method we use to determine the charts, using "hydraulic dimensions". This allows for a better fit of the TM-1 across all spoke sizes and it did shift some charts slightly. We recommend the new charts for all TM-1's.

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So better to use new conversion table chart