Electronics > Electronics
How to evaluate a servo spec
Polaris:
--- Quote from: Admin on December 20, 2006, 10:34:29 PM ---Ive modified like every servo in existence . . . ok maybe like 8 different types, for a total of like 40 servos . . .
Anyway, they are all basically the same. All major brand servos today are designed to be modified, except for maybe the micro servos . . .
The hardest servos to modify are the ones with metal gears, because the metal pin is damn hard to remove without damaging the gear . . .
and just in case you havnt seen this:
http://www.societyofrobots.com/actuators_modifyservo.shtml
I tried to write that tutorial so that it is useful for any type of servo . . .
--- End quote ---
Thanks for the advice, the tutorial is definitely come into handy as i will be "surgically" opening up my newly bought HS-422 servo. ;D Btw, it is really true that we don't need any interfacing electronics such as motor controller/driver for servo? i infer that we can plug our servo's control signal line straight into our microcontroller's port? Btw how do we connect the servo cable to our processor and power line? sorri for this dumb question, but i infer that we are supposed to get a male connector which have three pins and from there we connect each of the pin to the respective points? ???
i think i will use a seperate power source for the servo and microCtrler as the former draws more current and to isolate both circuit. Am thinking to put a power regulator for the servo to regulate the power supply to the servo.
dunk:
so i always solder some 3 "header pins" onto my stripboard for each servo.
servo connectors have the same standard 2.54 millimeter pin spacing as most standard through hole electronic components so you can just push these pins into your plugblock (or whatever you are using for prototyping).
some pictures of header pins:
http://www.unicornelectronics.com/Connectors/cohp10.html
http://www.packetradio.com/cgi-bin/shopper.cgi?preadd=action&key=HEDR40
http://www.hebeiltd.com.cn/?p=pin.header.connector
using a separate power source is definitely a good thing to do if you plan on connecting a few servos.
just remember to connect all the negative terminals of any power supplies you use together.
hope this helps!
dunk.
Admin:
--- Quote ---Btw, it is really true that we don't need any interfacing electronics such as motor controller/driver for servo?
--- End quote ---
Yeap. Its why I use them so often, and highly recommend them to beginners ;D
--- Quote ---i infer that we can plug our servo's control signal line straight into our microcontroller's port?
--- End quote ---
Yeap, use a digital output port.
Dosbomber:
Interesting write-up on modifying a servo. Sort of a mechanical jury-rig to override the pot's signal.
Another way, is to remove the pot entirely, and replace it with a pair of identical resistors, wired in similar fashion as a pot. It might be a little more complicated the first time, but it accomplishes the same task and might be necessary if your servo is a different design (either way works with the Futaba S3004 shown in your write-up). I'm not sure I'd trust some Krazy Glue on the pot shaft.
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