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Old 07-26-2004, 08:20 AM   #1
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Default Robitronic Pro 2000 problem

Hi!
I have a problem with my Robitronic pro 2000 charger. If I try to charge a battery pack with more than 5.5 Amps, the charge current will flex between 2 and 8 Amps.

Does anyone know what the problem might be?

Thanks in advance!
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Old 07-26-2004, 03:39 PM   #2
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Nice to see a scandinavian...

I would check for bad wiring / loose connections and if the power supply is poor.
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Old 07-27-2004, 12:32 AM   #3
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My 20A power supply is working good. At least with my other chargers.

As for bad wiring, I haven't found any. I will however take another look.

Any other ideas?

THanks,
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Old 07-27-2004, 01:25 AM   #4
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Default Check the batteries

Sounds like you have got a sick battery somewhere.

Did you try other packs?

Did one of the cells turns hot before the others?

Depending on the configuration, you might just have a dead cell somewhere.

Or is your charger the pro with the multi charging profile that oscillates the current to give you more runtime and punch?

That's all I can think of, hope that helps.

Cheers
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Old 07-27-2004, 02:53 AM   #5
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shouldn't have anything to do with the pack...

check over all your settings, if there is a pulse/linear toggle option somewhere, make sure it's set to linear

EDIT: re-reading your post, it seems like the charger may be faulty... if it works fine under 5.5A i think there must be something wrong with the charger
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Old 07-27-2004, 02:58 AM   #6
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The charger is linear. It's the Expert which got different phase-amps, not the Pro.

If it's not wiring or PS, I also tend to say it's the charger it self, which is faulty.
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Old 07-27-2004, 03:04 AM   #7
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Thanks for the input!

But I've allready isolated the problem to the charger. I'm thinking there is a broken electronic component, but I don't have the knowledge.

Anyone with experience in electronics who can come up with (and tell me how to inspect) possible faults?
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Old 07-27-2004, 04:18 AM   #8
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Hmmm...

The basic thing to start with, is to check if there are some component, which looks burnt...

Or if there's a soldering, which looks bad. You might like to try re-soldering all the soldering, unless it's SMD (=surface mounted components), then it might be too difficult.

If it's not SMD, also check if a component got a broken leg.

You can also try to write to Robintronic for an advice, they have their e-mail on their web-site.

Or if you can find a electronic service company in your area, it might be worth a try.
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Old 07-27-2004, 04:49 PM   #9
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I think I will take your advice and email robitronic.

I just thought that maybe someone on this message board would recognize the problem and know the cause of it.
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Old 07-27-2004, 09:38 PM   #10
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I have a robitronic dyno with the charger function.
The charging current fluntuate as you described when I use high charge current, like more than 6 amps.
However, this only happens when I have the charger hooked up to my converted computer power suppy. The charging current would stay constant if I have the charger hooked up to a 12V battery.
Try monitor the power supply output voltage while charging. In my case, it seems that the supply respond to current demand too slowly, causing the fluctuation.
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Old 07-29-2004, 05:15 AM   #11
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Airwide, is the problem solved?

One thing came to mind; Many PS have a voltage adjustment knob internally, so it might be worth checking. Maybe the voltage just need an adjustment of 0,5 volt upwards. Just consider warranty...
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Old 07-29-2004, 05:35 AM   #12
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Quote:
Originally posted by Cole Trickle
Airwide, is the problem solved?

One thing came to mind; Many PS have a voltage adjustment knob internally, so it might be worth checking. Maybe the voltage just need an adjustment of 0,5 volt upwards. Just consider warranty...
No I haven't found the problem.

The power supply isn't the problem. It's working good with two other chargers. The voltage output is 13,5V, which should be sufficient even for the Robitronic charger
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Old 07-29-2004, 06:29 AM   #13
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The 13,5 volt, is that with a load or is it non-loaded?

A guy at our track runs a Robitronic Pro 2000 at just right under 12 volt. But I dont know at which rate he charges though...

Off-topic: Where do you purchase your RC-stuff? It seems to me that Germany got lower prices, and usual taxes aint a problem, while it's from Germany...
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