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Topic: Can't control my new Solar D229 Servos. (Read 1 time) previous topic - next topic

soupguy

G'day all,

I recently purchased a few of these fellas:  http://www.hobbypartz.com/33p-solarservo-d229.html

I'm pretty new to all this, but I had no trouble getting the servo that came with my sparkfun starter kit to change its position to match a potentiometer I'd wired up to my UNO. 

The solars are giving me a little more trouble - wiring them up to Servo.h doesn't produce much in the way of useful movement.  Occasionally I can get them to spin for a bit, then they just stop responding.

The code from here: http://principialabs.com/arduino-serial-servo-control/ didn't do much for them either!

I'm powering them straight from the arduino board - which I believe is 5v?  If they're rated for 4.8, is there a chance I'm just frying them?  (I'll try a lower voltage now...)

They don't appear to be physically constrained to 180 degrees of motion, which is not a problem for my needs, but I'd really appreciate any guidance on how I can control them...

Anyone used them and can point me in the right direction? 

Cheers,

Soup

oric_dan

I've never heard of Solar servos before, but find the spec info rather bizarre.
Usually servos are listed with 4.8-6V power range.

Also, speed = 0.1@4.8v doesn't make any sense to me. What's the units of 0.1?
Miles per year????

Also, you should NEVER EVER EVER power your servos from the Arduino 5V pin.
Use a separate battery.

Also, "straight from the arduino board - which I believe is 5v" --> umm, so you
don't even know what voltage is being applied. Bad dog! Get a DMM.

Also, as they are digital servos, they may just require a different pulse protocol
than the Arduino puts out. Who knows?

So, take your pick as to the problem here. I would first try to track down better
spec info, as they are some off-brand thingamabobs to start with [at least in my
hemisphere of the world].

soupguy

Miles per year...  Swallows per summer? 

It says 5v on the pin, I thought that was a pretty decent clue, but I shall take your advice if you could do me the kindness of expanding the DMM TLA?  Direct Motor Manipulator?

Thanks for the guidelines - I'll try and hunt down a more specific spec.

oric_dan

DMM = Digital MultiMeter, never leave home without one. LOL.

Swallows per summer?  .... cool.

http://dictionary.reverso.net/french-english/une%20hirondelle%20ne%20fait%20pas%20le%20printemps

DuaneB

Hi,

Have a look at the two links in my signature for some guidance on powering your servos and test code.

Duane B
Read this
http://rcarduino.blogspot.com/2012/04/servo-problems-with-arduino-part-1.html
then watch this
http://rcarduino.blogspot.com/2012/04/servo-problems-part-2-demonstration.html

Rcarduino.blogspot.com

soupguy

Thanks Duane - those articles are an excellent resource.  I guess I'm off to buy some batteries!

soupguy

Hurrah!

Powering the Solars through four AA batteries works a treat.  The standard sweep sketch does all the right things.  I think I've fried a couple of them, but hey - you gotta break things to learn, right?

Thanks for the help duane & oric_dan!

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