Hi,
I've recently purchased a servo motor with the following specs:
http://robokits.co.in/shop/index.php?main_page=product_info&cPath=2_5&products_id=541
So I've tried out the arduino example sketches knob and sweep.
My problem is that when I use a battery pack I get normal results , but when I use a battery eliminator rated 6v -5A , the motor behaves oddly just moving randomly.
What could be my problem?
It could be that you have not connected the ground of your eliminator to the ground of your arduino.
It could also be that your eliminator has an AC output.
It could be many things, post a photo, not more than 1000 pixels wide showi g your wiring and the parts.
Well , I did connect the grounds and it is a DC eliminator which has 2 modes stereo and charger.I'm using it in the stereo mode.
The connections aren't color coded
I think it'll be easier to just mention the schematic.
The red wire from the eliminator goes to servo's Vcc and the ground goes into a breadboard which is also connected to ground of the servo and ground of the arduino.
And PWM is attached to servo's signal.
Any chance of a photo where you can actually see the wiring?
DC eliminator which has 2 modes stereo and charger.
You said it was a "battery eliminator" now it says it is a DC eliminator, never come across one of those.
Measure the voltage coming out of that thing and say what it is.
So the problem is with the eliminator.
It is a Battery eliminator giving DC .
I realise that the voltage given by the eliminator is quite variable.
Sometimes it reads 6v and other times 7v and even 8v(which is greater than the rating of my servo)
However I did get the servo to work properly finally . Not sure what the mistake was.
But ultimately I think I'm just going to stick with rechargeable batteries since they are easier to handle and give accurate results.The eliminator's DC output may destroy a component by going out of the operating range. Is there any way I can fix this problem with my eliminator ? Or is that just the way they are?
Thanks for the help!
Is there any way I can fix this problem with my eliminator ? Or is that just the way they are?
Well I have never come across one of those but it could be an old fashioned power supply with a transformer, rectifier and output capacitor. With those the regulation is not good. That means that the output voltage changes with the current drawn. Normally it is only at the maximum current is the voltage what it states.
You can try a plot of voltage against current if you have some suitable power resistors to provide different loads and see how quickly it drops off. Then you could try using a low drop out regulator ( LDR ) at 6V or switch the output to 12V and use a normal voltage regulator to drop it down to 6V. There is some heat generated but at least the powering side is reused.
Alright , thanks for the tip.
