DIY Stringing Machine

[jjoaoggomes]

I am in the process of building a diy drop weight stringing machine.

I need your help guys!!! Can anyone tell me the exact dimensions of the shaft (along with the scale measurements) and also the exact weight of the weight on a drop weight machine?


Will post pictures and keep the thread updated.

 

[zapvor]

how are you building it?

 

[Tennis_dude101]

Following, it will be interesting to see how it goes....

 

[jjoaoggomes]

how are you building it?

Just building a simple drop weight machine, kind of replicating the style of the klippermate, gamma x2, etc. BUT, I really need the exact measurements of the lever (with scale for tension) and also the exact weight of the weight. I searched all over the forum and all over Google and couldn't find anything.

Helllllp pls

PS- Along with updating the thread with photos, I am gonna post the full schematics with measurements so anybody can do the same.

 

[Brokenstrings]

My drop weight weighs about 4lbs 13 ounces. The lever shaft is about 20 inches long. 5 lb increments are about 1 1/4 inch each. So many variables with weight of the lever shaft, etc., but I'm sure you have all that figured out. With a pull tension meter, it shouldn't be too hard to get accurate specs. Money wise, probably easier to just buy one complete for $175? Will be interested to see your work though.

 

[MathieuR]

You can take "any weight".

See http://tt.tennis-warehouse.com/index.php?threads/the-physics-of-a-dropweight-tensioner.170414/

 

[Irvin]

Just building a simple drop weight machine, kind of replicating the style of the klippermate, gamma x2, etc. BUT, I really need the exact measurements of the lever (with scale for tension) and also the exact weight of the weight. I searched all over the forum and all over Google and couldn't find anything.

Helllllp pls

PS- Along with updating the thread with photos, I am gonna post the full schematics with measurements so anybody can do the same.

My guess the exact measurements will valley for every machine. The DW uses leverage to pull. The longer the lever, the heavier the weight, and the smaller the diameter of the gripper the higher the tension. The formula should be Rb / Rg * M where Rb is the radius of the bar, Rg is the radius of the gripper, and M is the weight of the sliding weight. You will also have to account for the weight of the bar which is constant.

 

[Clintspin]

Seems like the simplest way is to build it with a bar and weight similar in nature to machines on the market and then use a tension meter to mark the bar. I imagine that is why the OP is asking for those pieces of information as opposed to complex calculations.

 

[MathieuR]

my Stringway bar is 15.1mm in diameter. The main weight plus screw is 2500 gram.
The small weight+ screw is 632 gram.

 

[mcleantennis1985]

Just curious, are you doing this to save money or is it a hobby of yours?

 

[MathieuR]

I don't know the situation in Portugal, but in the Netherlands you can buy a used dropweight from €50.

 

[jjoaoggomes]

Thank you so much everyone for the tips and measurements!

For who asked about the motivations behind this diy project: because I am tired of spending s**t loads of money on tennis gear. Tennis gear is REALLY overpriced this days. I am here to stop the madness! Also, having a background on some diy stuff, I am into this sort of builds. It's quality time in the garage .

I will start this evening on some sample parts, taking measurements, testing weight scales etc, if I don't finish too late I will post some pictures of the progress so far later tonight.

Thanks everyone! Let's do thissssssssssssssss, VAMOS!

 

[eelhc]

Thank you so much everyone for the tips and measurements!

For who asked about the motivations behind this diy project: because I am tired of spending s**t loads of money on tennis gear. Tennis gear is REALLY overpriced this days. I am here to stop the madness! Also, having a background on some diy stuff, I am into this sort of builds. It's quality time in the garage .

I will start this evening on some sample parts, taking measurements, testing weight scales etc, if I don't finish too late I will post some pictures of the progress so far later tonight.

Thanks everyone! Let's do thissssssssssssssss, VAMOS!

Well... coming from golf, skiing, ice hockey... I think tennis gear is actually quite inexpensive compared to my other hobbies/sports.

But if you're a machinist... why not?

You might want to contact this guy:

 

[kkm]

Well... coming from golf, skiing, ice hockey... I think tennis gear is actually quite inexpensive compared to my other hobbies/sports.

But if you're a machinist... why not?

You might want to contact this guy:

Amazing!