A few classic babolats

jeroenn

Professional
Hi All,
I've aquired a few classics recently.
A babolat 2002 and a Babolat Starring (dual I think).

So there are a few issues with them.
The 2002 was pulling weird tensions, which seemed to be related to calibration at first. But I screwed that up.
Later I found out that the flat cable to the tension dial was lose. But now the calibration is so far out of whack, the machine only beeps one time (long) when I press the tensioner.
I found a video online describing the calibration for the star 3/4 which seems to be the same.
The problem however is, that I have 3 pots, rather than 2. None of them are marked with 10/30 or anything else.
I've reset them all 3 with the 22 turns Clockwise / 11 turns CC to no avail. I checked the mainboard, everything seems secured.
Does anyone have any tips? See pictures below. I would love to know which pot does what.

The second machine I got today is working perfectly. It pulls tension very precise which is cool for such an old beast. I opened it up and there doesn't seem to be any way to calibrate anyway.

However, the turn table is rusty and the clamp bases are whacky. The springs are broken. I replaced one with a spring from an Pro's pro base clamp and that fixed a lot, but I need to adjust them. There is a plastic plug, but no hole unlike the yellow ones? So how does one fine tune these critters?

For now I put the 2002 turntable on the Starring, which fits nicely, so I got one working machine, but I like to get them both up and running. I mailed someone in Austria, still waiting for reply.

Cheers!

J

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Jeroenn: The calibration on your machine is nothing like the Star 3. The Star 3 uses a spring reference and measures the compression of a spring to determine pulled tension. The 2002 uses a load cell, an entirely different way to measure pulled tension. All this means adjusting the calibration is a lot more complicated. If you have a spring gauge and digital multimeter that measures DC Volts you can adjust the machine offset and gain (calibration). DO NOT USE a digital calibrator, you will get erroneous measurements.

On the offset board (the pc board with 3 potentiometers) are two gold pins sitting above a black plastic base. The pins are about 0.1" apart and maybe 0.5" tall. The pin closest to the gray ribbon cable is the negative terminal of the multimeter. The pin farthest from the ribbon cable is the positive terminal of the multimeter.

Set the meter to read between 0-1.0 VDC. Connect the black meter wire to the negative terminal and the red meter wire to the positive terminal. Power up the machine wait for two beeps before making adjustment.

The offset adjustment screw is the blue potentiometer on the offset board nearest the stringer when you are standing to string. Turn this screw until you get 0.9 VDC. That sets the offset.

Let me know when you've finished so we can proceed to calibration. Do you have an old fashioned spring calibrator?

More to follow,

Albert Lee
Tour MRT stringer
Potomac, MD USA
 

jeroenn

Professional
Thank you!! This is excellent. I don't have a multi meter yet, but I'll run out and get one tomorrow and report back !
Cheers!
J
 
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