Need help please for my stringing machine

Brunnel

New User
Hello everyone . My name is Onintsoa Brunnel .
I have a problem on my machine. It is a gamma progression ESII electronic .
I do not touch anything with the machine but if I want a tension of 55 lbs the te'sion that appears on the display automatically varies from 54 to 58 lbs. If someone can help me I could send the video and photos.
Sincerely Onintsoa Brunnel
 

McLovin

Legend
I'll echo what @mmk said, but add that if you have it set to 'Constant Pull', then the tension head will continuously adjust as the string relaxes. +- 3lbs seems a bit excessive, but I guess it depends on the string you're using.
 

esgee48

G.O.A.T.
I would say that the amount of overshoot may be a little excessive. However, all eCP machines will overshoot to a certain extent since the load bridge sensitivity has to detect that ref tension has been reached. Think about it. The tension pulling mechanism has to exceed ref tension before load cell says STOP. Then if the string relaxes back below ref tension, another signal is send to start pulling again. Can you provide a lot more detail such as what string, gauge, pulling speed, pre stretch function on or off? It's like you complaining my vehicle can't go fast enough. The answer would depend on what you are driving, where you are driving and what is the rest of traffic doing. :rolleyes:

edit: TBH, I suspect that there is nothing wrong. As long as the displayed tension is close to what you asked for, you should be good.
 
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Brunnel

New User
I would say that the amount of overshoot may be a little excessive. However, all eCP machines will overshoot to a certain extent since the load bridge sensitivity has to detect that ref tension has been reached. Think about it. The tension pulling mechanism has to exceed ref tension before load cell says STOP. Then if the string relaxes back below ref tension, another signal is send to start pulling again. Can you provide a lot more detail such as what string, gauge, pulling speed, pre stretch function on or off? It's like you complaining my vehicle can't go fast enough. The answer would depend on what you are driving, where you are driving and what is the rest of traffic doing. :rolleyes:

edit: TBH, I suspect that there is nothing wrong. As long as the displayed tension is close to what you asked for, you should be good.
Hello my friend please can you send me your email like that i can send you the videos of it. Mine is onintsoabrunnel@gmail.com
 

Brunnel

New User
I'll echo what @mmk said, but add that if you have it set to 'Constant Pull', then the tension head will continuously adjust as the string relaxes. +- 3lbs seems a bit excessive, but I guess it depends on the string you're using.
It is an old machine but it should be staying on the tension that you enter . But even touching anything it is going up and down. And i can't fix it
 

esgee48

G.O.A.T.
If this is a new issue with your old machine, you should be discussing them with @Gamma Tech or calling Gamma Sports. Could be nothing or could be your electronics related to load cell is dying.

I do not share personal info on this forum.
 

McLovin

Legend
@Steve Huff & @esgee48, after reading his response, I’m thinking maybe he’s not actually tensioning at the moment it’s varying. It may be that he turns the machine on, sets the tension to 55, and the readout keeps changing from 53-58.

If that’s the case, then contacting Gamma (as you’ve said multiple times now) is most definitely the proper recommendation.
 

Brunnel

New User
I will send a text to gamma sports. Thank you all for your advice. And i'm outside the US i'm from Madagascar. I'm just hoping that someone has already the same problem. And can help me
 

USMC-615

Semi-Pro
Does the ES II have tenths graduations (.1 - .9) in between pounds, or kg’s for that matter, like a 2086? As quick as this is flashing only going .0 and .5 and repeating the pattern basically, might just be a faulty LCD.
 
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Brunnel

New User
Does the ES II have tenths graduations (.1 - .9) in between pounds, or kg’s for that matter, like a 2086? As quick as this is flashing only going .0 and .5 and repeating the pattern basically, might just be faulty LCD.
So you think that it is just the LCD then. It is just .0 and .5
 

fritzhimself

Semi-Pro
From the looks of it, it seems like this could really just be a small thing.
If you don't think you can do it, I would check with a friend who knows about electronics.
In any case, you need to disassemble the rotary head and the switch for the weight graduation.
Maybe you can use something from the manual.
I have posted the link before.
 

USMC-615

Semi-Pro
So you think that it is just the LCD then. It is just .0 and .5
I can't pinpoint that the LCD is the root of the problem...just like all here, taking a stab at what it could possibly be. If you have one or two calibrators by chance, rotate the turntable 90 degs to the tension head and lock its' rotation, pull tension with a calibrator(s) between the furthest-most locked base/clamp and tension head, and compare that to the tension head readout.

Is the problem linear, regardless of what tension you set on the tension head...while it's sitting idle, and pulling tension? Does the display ever show anything other than a fluctuation between either .0 and .5 only? I'm only assuming the tension head is supposed to show tenths (.1 thru .9).

Understand, we're all just backseat driving this thing with possibly what the problem is. I'd definitely be on the phone with Gamma and/or emailing them one...no doubt they'll tell you to send the tension head in to be looked at.
 
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USMC-615

Semi-Pro
From the looks of it, it seems like this could really just be a small thing.
If you don't think you can do it, I would check with a friend who knows about electronics.
In any case, you need to disassemble the rotary head and the switch for the weight graduation.
Maybe you can use something from the manual.
I have posted the link before.
I'm thinking it‘s probably something small as well...might just be something he'll have to 'learn to adjust on the fly' as he's stringing racquets (allow for this difference or whatever)…while he's stringing, and get used to it. Kinda why I suggested check the tension head against a couple of calibrators, and check linearity half a dozen times from say 40 lbs to 70 lbs.
 
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Irvin

Talk Tennis Guru
Use a calibrator to see if it is pulling steady, or is actually making adjustments that fast.
If there are adjustments of 4# you can hear it kicking in to pull tension. If it’s just changing tension on the display without a tension pull it could like a bad load cell or something electrical. I‘d contact Gamma or a repair facility.
 

esgee48

G.O.A.T.
I Googled common symptoms associated with load cells going bad. What you described appears on that list. Causes and possible fixes were listed if you have the equipment to test. Corrosion was also listed as a cause as well as shock/cracks. Without equipment, you need to return the unit for repairs by the vendor or their authorized representative.
 

esgee48

G.O.A.T.
Europe probably has a repair facility since there is a Gamma Europe. OTW all he has is a 50 lb paperweight. o_O
 
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