ERT 300 Tennis Computer

Discussion in 'Stringing Techniques / Stringing Machines' started by dgdawg, Mar 19, 2011.

  1. dgdawg

    dgdawg Professional

    Joined:
    Nov 17, 2006
    Messages:
    805
    Location:
    Colorado USA
    ERT 300 Tennis Computer:
    Does anyone use the thing? I had a guy bring one to me when he dropped off some frames.
    I used it like the directions said. Dude wanted a DT of 37, or something.
    I got that reading 3 times out for 10 tries. Is a tool like this for real?
     
    #1
  2. Irvin

    Irvin G.O.A.T.

    Joined:
    Mar 15, 2007
    Messages:
    11,787
    Location:
    Marietta, Ga
    Same frames or different frames? I would think different frames would provide different readings. With the price tag they carry they should be real. You may want to provide some different feedback that the ones TW has now

    http://www.tennis-warehouse.com/feedback-ERT300.html

    Irvin
     
    #2
  3. Ash_Smith

    Ash_Smith Hall of Fame

    Joined:
    Jan 18, 2005
    Messages:
    3,852
    Location:
    A green and pleasant land
    Dawg, did you always use it in the same spot on the string bed?

    Cheers

    Ash
     
    #3
  4. Mighty Matteo

    Mighty Matteo Semi-Pro

    Joined:
    Oct 28, 2010
    Messages:
    471
    #4
  5. TennezSport

    TennezSport Hall of Fame

    Joined:
    Jan 18, 2006
    Messages:
    1,885
    Location:
    Northern NJ, USA
    We use it..........

    We use it all the time here to get a base reference for every customer. We always position it on the 9th string dead center and get 3 readings. The tool produces a pulse that simulates moving the string by 1 cm and measuring the resulting DT(dynamic tension), you then use the conversion wheel to get a tension reading. A lot of pros use this tool along with a number of the best stringers. Understanding DT is really important as that is what a player feels at impact.

    Cheers, TennezSport :cool:
     
    #5
  6. drakulie

    drakulie Talk Tennis Guru

    Joined:
    May 3, 2004
    Messages:
    24,464
    Location:
    FT. Lauderdale, Florida
    ^^Ditto.

    I do the same for all my customers.
     
    #6
  7. dgdawg

    dgdawg Professional

    Joined:
    Nov 17, 2006
    Messages:
    805
    Location:
    Colorado USA
    Yeah, man. Same spot, 10 tries, got the same reading only 3 times.
    The other 7 were all different.
    For whats it's worth, the 3 identical readings I got was what my customer was looking for.
    Maybe I'll ask him if I could use it for a while. I'll throw in a free string job for the inconvenience.
    It would be nice to check DT for my customers. I can go to the courts on a Saturday and find a bunch of my customers there.
    This tool could get me to walk away with a few to string :shock: :)
     
    #7
  8. Technatic

    Technatic Semi-Pro

    Joined:
    Oct 12, 2009
    Messages:
    463
    I think such a tool is essential for every stringer because it checks the end result of your stringing job but it also checks if your machine is still working well.
    It also tells you if a string keeps the tension well, if strings with too much remaining elongation are used the SBS can go down by 15 to 20 %. So if a customer complains about his stringbed it is very easy to determine if he needs a new string.

    I once read this saying: A stringer without a stiffness tester is like a carpenter without a ruler.
    I use the Stringway version of the ERT300 called the Stringlab.

    Because these tools do quite a complicated job, they are also sensitive to how you use them:
    - You have to place it in the centre of the stringbed where the bed vibrates maximum. The tool can not function where the stringbed does not vibrate enough.
    - You have to hold the racquet always at the end of the grip, so that it hangs as free as possible.

    What kind of difference did you get during the 10 tries?
     
    #8
  9. dgdawg

    dgdawg Professional

    Joined:
    Nov 17, 2006
    Messages:
    805
    Location:
    Colorado USA
    I agree, an accurate tool like this could be of real value.
    I understand you didn't say this but, I don't know if I necessarly agree with the comment: A stringer without a stiffness tester is like a carpenter without a ruler, but I get the analogy
    I'm thinking I need to learn how to use it.
    So, this could possibly be the answer to the question I get all the time: "is their a way to check the tension of a frame after it's strung?".
    My response is: Not without a really expensive Bab or Prince RDC.
    This just goes to show you, you learn something new every day!!

    Technatic: thanks for mentioning Stringlab. I'll be looking at that too.
    The disparities I got were big. This is why I ask this ? here. I knew I'll get answers from experienced users.
    Not that I agree with everything I read here, you've said to me before, and I wholeheartedly agree, it's healthy discussion. More knowledge is only a good thing!!!
    I won't use exact #'s I was getting, I can't remember what the exact #'s were, but I will say they were all over the place.
    I'm sure it was operator error
     
    #9
  10. aussie

    aussie Professional

    Joined:
    May 20, 2006
    Messages:
    874
    Location:
    Brisbane, Queensland, Australia
    I regularly use the ERT 300 to measure Dynamic Tension and then to convert that reading to a tension. However, I've been using the Racquettune app on my Ipod Touch more often than not as I believe that it gives me a more accurate reading of tension.

    So my recommendation is to spend the AUD$1.19 on the app as opposed to the AUD$170 on the ERT 300 if you want to make a choice. It will give you a consistent tension reading which you can use as a benchmark at the very least.
     
    Last edited: Mar 23, 2011
    #10
  11. dgdawg

    dgdawg Professional

    Joined:
    Nov 17, 2006
    Messages:
    805
    Location:
    Colorado USA
    I'll be checking out the ERT300. I use a blackberry. I've been down the iPhone road. Let's just say...it didn't measure up to my blackberry for my needs.
    I'm typing this reply on it now.
     
    #11
  12. Lakers4Life

    Lakers4Life Hall of Fame

    Joined:
    Jul 13, 2009
    Messages:
    3,638
    Location:
    Laker Land
    You can get a new iPod Touch and install the same app. The older iTouch worked too but you needed to add a microphone.
     
    #12
  13. Technatic

    Technatic Semi-Pro

    Joined:
    Oct 12, 2009
    Messages:
    463
    From stiffness to stringing tensions

    I use the SW Tension Advisor to go from stiffness to stringing tensions, it is quite accurate.
    It is also on line now: www.stringway-nl.com/en/TAonline/calc.php

    If you come to the stiffness advise you can adjust that by hand.
     
    #13
  14. aussie

    aussie Professional

    Joined:
    May 20, 2006
    Messages:
    874
    Location:
    Brisbane, Queensland, Australia
    Seriously, I cannot recommend the Racquettune app for iPhone and iPod Touch enough. It is an incredibly inexpensive tool (assuming you already have an iPod Touch) that all stringers should have.
     
    #14
  15. dgdawg

    dgdawg Professional

    Joined:
    Nov 17, 2006
    Messages:
    805
    Location:
    Colorado USA
    Presonally...I don't have "i" anything.
     
    #15
  16. jnd28

    jnd28 Rookie

    Joined:
    Aug 27, 2006
    Messages:
    313
    Location:
    SF Bay Area
    I have the Eagnas tension gauge and use to use it to great success but I now use the iPhone app mentioned prior. Both work just fine. I don't know if they are accurate but I do think both are consistent which really is all that matters.
     
    #16

Share This Page