Babolat 3001 instructions

galicia2102

New User
As i have 2 post related to this machine, i am copying what i posted in the other in case someone only monitore one of then:
“Hello,
i was testing calibration of my Babolat VS3001 during this weekend spending a lot of hours but now i am able to understand the process.

first of all, thanks to all the people that help me or at least tried to help: @abllee2198 @Babolat Official @Mike345 @fritzhimself @Irvin @jim e @jeroenn @Hankenstein

here my explanations:

i don´t know if someone had the same problem or could know what is the cause of this error (by double tension). Maybe is something more complicated than simple things but if someone has any idea i will appreciate so much

thanks for your time, hope explanation is clear”
 
Last edited:

Mike345

New User
The only thing that I can think of is that the strain gauge maybe damaged or the loadcell beam has been over stressed and lost some of is elasticity. the aluminium section is not returning to its original shape. did the machine have its carriage transport bolt in it when you bought it?
 

galicia2102

New User
Thanks Mike
Transportation was done without the bolt...maybe the load cell is damage but strange that value is exactly the middle.
I am going to check with the electronic engineer if he has any idea.
I am going to test the machine this weekend and check again if value is really double of the display to see the accuracy day by day.
For me is something of how the machine convert in kg the value of the load cell. But i am not expert
 

Mike345

New User
Just a thought. Did you try setting all three potentiometers to the middle of there range. Count 20 turns counter clockwise then 10 back clockwise. Pot 3 next to the head needs to read 0.9 volts secret button 4 should read 000, then try calibrating the pulling tension, if you can do this whilst having a test meter across the gold pins you will notice you have to balance pot 3 and pot 1 adjustments against each other. Do this set to 60lb or 27kg.

This may cheer you up, if the load cell is damaged.
I can now get the load cell repaired, its possible to fit new strain gauges to the beam load cell.

As long as aluminium load beam has not been bent or over stretch.

I'm looking into getting new beams CNC machined but will need to see if this is cost effective with the cost of fitting the new strain gauges as well.

Mike
 

jeroenn

New User
I have a machine here with exactly the same issue (although this one is going about 10 kilo's above calibration). I've replaced the flatcable (these are known to delaminate and die), I've switched the offset board to exclude issues with the measuremnets / amplification and it made no difference. This weekend I will replace the loadcell as it's likely broken. @Mike345 Do you have the specsheet for the replacement straingauges? Reason I'm asking is that I'm in contact with a cell manufacturer and I may have them do a run of cells to get a bunch of these babolats working again. They can take it from an existing cell, even a broken one, but an actual spec sheet would be best. Creating the aluminium bars is not an issue, it will take 5 minutes to program the CNC and cough up enough of them to sink a battleship...
 

Mike345

New User
I have a machine here with exactly the same issue (although this one is going about 10 kilo's above calibration). I've replaced the flatcable (these are known to delaminate and die), I've switched the offset board to exclude issues with the measuremnets / amplification and it made no difference. This weekend I will replace the loadcell as it's likely broken. @Mike345 Do you have the specsheet for the replacement straingauges? Reason I'm asking is that I'm in contact with a cell manufacturer and I may have them do a run of cells to get a bunch of these babolats working again. They can take it from an existing cell, even a broken one, but an actual spec sheet would be best. Creating the aluminium bars is not an issue, it will take 5 minutes to program the CNC and cough up enough of them to sink a battleship...
I do not have the spec as i called in favour from a company I do work for. They sent mine to a "supplier who makes load cells. It came back sealed but I believe they used two half bridge cells to make it up. I can ask if they will give me the spec. What country are you in?
 

jeroenn

New User
I'm in Holland. Right now I'm using the service of a guy in Germany for a loadcell repair, but he's been doing essentially the same routine: he found a company to repair or replace the strain gauges. It's pretty expensive though. Given that there are tons of machines waiting for a new cell, I want to try to get a bunch manufactured. I could even go to a Chinese manufacturer if I can get all the specs sorted. Chances are it's cheaper and the quality would probably be a lot better than what Babolat used 25 years ago..
 

Mike345

New User
I'm in Holland. Right now I'm using the service of a guy in Germany for a loadcell repair, but he's been doing essentially the same routine: he found a company to repair or replace the strain gauges. It's pretty expensive though. Given that there are tons of machines waiting for a new cell, I want to try to get a bunch manufactured. I could even go to a Chinese manufacturer if I can get all the specs sorted. Chances are it's cheaper and the quality would probably be a lot better than what Babolat used 25 years ago..
How much is he charging?
 

galicia2102

New User
I checked in CN and they can do 10 units minimum and price is 40 USD per unit.
But we need to send specs to be sure that works. Shape and sensibility at least
 

galicia2102

New User
To manufacture the beam is really esay and cheap. I have a 3d model and i can do it my milling in CNC for some units with low cost
 

mountanddo

New User
the load cell on 3001 looks identical to the one used on my star 4. I am pretty sure everyone who has star4/2502 will be interested to have one extra loadcell as spare parts.
 

galicia2102

New User
Hello
Yes, that is the point. I have checked with Babtec in France company property of Babolat if they can supply the data sheet but they refuse to give to individual people. Mean that not possible to access to this info. They have but they don’t provide.
If we don’t have this specs, it is a lottery to make a new load cell due to different parameters that have to be taken account in the manufacturing process.
Picture of the load cell CR40 ( by the way in the new machines they use CR50, probably range 0-50kg instead of 0-40kg on old machines)
 

mountanddo

New User
The gold colored one is a gravity release base. I am testing it, it is much nicer and easier to use than the original one.
 

kkm

Professional
I will definitely want one load cell as spare part though my star 4 still works fine.
It looks like you modded the adjustment wheel on your Yonex/Kimony starting clamp. Would you be willing to elaborate on what you did?

From where did you source the gold gravity release base?
 

mountanddo

New User
the starting clamp is not kimony. they are new products from the same company that makes gamma and alpha machines. I got them from a recent trip to Hong Kong. The starting clamp is $50, the base clamp is $90.
 

Babolat Official

Hall of Fame

galicia2102

New User
Just a thought. Did you try setting all three potentiometers to the middle of there range. Count 20 turns counter clockwise then 10 back clockwise. Pot 3 next to the head needs to read 0.9 volts secret button 4 should read 000, then try calibrating the pulling tension, if you can do this whilst having a test meter across the gold pins you will notice you have to balance pot 3 and pot 1 adjustments against each other. Do this set to 60lb or 27kg.

This may cheer you up, if the load cell is damaged.
I can now get the load cell repaired, its possible to fit new strain gauges to the beam load cell.

As long as aluminium load beam has not been bent or over stretch.

I'm looking into getting new beams CNC machined but will need to see if this is cost effective with the cost of fitting the new strain gauges as well.

Mike
hello @Mike345
did you be able to make new load cell? it would be interesesting for me. the beam is not a problem to make it, the point is how to fit the new strain gauges on it

thanks
 

jeroenn

New User
I was in talks with a company in the UK who are able to make them or get the specs from a good one. (probably even a faulty one). If you can do it for 40 bucks, I'll take a few for sure.
 

jeroenn

New User
How much is he charging?
Close to 300. It works though, you can see they replaced the strain gauge and the machine works ok, calibrates almost as original (it's a little off but not much).
If the rest of the machine is ok, I suppose it's worth it. This one went into a 3002, of which I also replaced the carbon brushes ( a few cents) and flatcables ( a few dollars).
 
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