Two questions - 1. I am using the SSC-32 to control six HS-645MG servos. The HS-645MG servo is rated for 6vdc max yet the SSC-32 manual states- {Apply 4.8vdc to
7.2vdc for normal servos. Apply 4.8vdc to 6.0vdc when using micro servos. Do not exceed 7.4vdc (measure it) when using HSR-5995TG servos}- Does this mean the HS-645 can handle 7.2vdc? They are considered fairly “normal” servos in the robotics community. I am very tempted to test this theory but I figure it is wiser to ask the question rather than watching my servos cook on a hunch. 2. What is the max amperage that can be fed to the SSC-32 or does it not matter.
When in doubt, you should always go by the rating for your servos. Some servos, like the HS-422 will be quite happy at 7.2V, but there is always a risk when exceeding the ratings for a given servo.
The SSC-32 can handle a range of voltages because different servos can handle different voltage ranges.
I personally would not power $250 worth of servos with more than a 5-cell pack. I have heard people say it works just fine, and I have also heard people say their servos “jitter” at that voltage. One thing is certain- the motor in the servo will not last as long at a higher voltage.
since where on the subject ,i was wondering about powering the ssc witha 9.6v battery since its the same v as a 9v ,well maybe my 9.6 is,nt fully charged but would 11v be the max and also what about a good voltage regulater and caps so it doesent get drawn down by motors ect.
so we could use car batteries in our bigger bots
6v it is. Thank you all very much.
My question about current was because I have a regulated variable power supply that pushes out 5v through 12v at 20 amps.
_Tim
One thing to watch with running from variable power supplies. Modern ones limit the current to whatever has been set, this is not really too much of a problem if you have the setting high enough. Older ones however (like mine) arent as clever and when the set current is exceeded just shutdown leaving the robot without voltage or current whatsoever. Not good half way through a move…
As spacejunk says, it will only draw whatever current it needs so you can afford to wind it up a bit further for that all-impressive, hi-speed move…
A-Bot is right, whatever voltage is in the spec is best. There are lots of instances where people get away with it and just as many who don’t.
My attitude is that someone, somewhere, who knows more about these things than me knows why it is set at that voltage and he/she had a good reason for saying it.
