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servo problems — Parallax Forums

servo problems

ArchiverArchiver Posts: 46,084
edited 2000-12-18 23:04 in General Discussion
Hi,

I have a Futaba Servo FP-S3003 a light weight standard servo. I want
to turn this servo into a motor. I already snipped off the black tab
inside of the 2 servos. The servos are not moving when I send them a
current. They are making humming noises. Does anyone have any
suggestions or tips that will make these servos work?

Thanks
fractal

Comments

  • ArchiverArchiver Posts: 46,084
    edited 2000-12-18 14:58
    You will also have to drill out the "+" shaped formation inside the main
    shaft. That will turn the pot, which won't do a full revolution. For more
    info on hacking this type of servo visit
    http://www.gorobotics.net/servohack.shtml
    -William
    GoRobotics.net
    Original Message
    From: fractal <fractal@w...>
    To: <basicstamps@egroups.com>
    Sent: Monday, December 18, 2000 8:56 AM
    Subject: [noparse][[/noparse]basicstamps] servo problems


    > Hi,
    >
    > I have a Futaba Servo FP-S3003 a light weight standard servo. I want
    > to turn this servo into a motor. I already snipped off the black tab
    > inside of the 2 servos. The servos are not moving when I send them a
    > current. They are making humming noises. Does anyone have any
    > suggestions or tips that will make these servos work?
    >
    > Thanks
    > fractal
    >
    >
    >
    >
    >
  • ArchiverArchiver Posts: 46,084
    edited 2000-12-18 21:26
    Hi,

    Just to clarify, the main shaft is the big black gear inside the servo
    that the allows the wheel to connect to the servo, Right?

    If I do scrape out the "+" from the inside of the main shaft, then
    will the servo still be able to turn the main shaft gear? If the "+"
    is removed from the inside of the main shaft won't this kill the
    servo?

    Thanks,
    fractal

    --- In basicstamps@egroups.com, "William Cox" <william@c...> wrote:
    > You will also have to drill out the "+" shaped formation inside the
    > main shaft. That will turn the pot, which won't do a full
    > revolution. For more info on hacking this type of servo visit
    > http://www.gorobotics.net/servohack.shtml
    > -William
    > GoRobotics.net
    >
    >
    Original Message
    > From: fractal <fractal@w...>
    > To: <basicstamps@egroups.com>
    > Sent: Monday, December 18, 2000 8:56 AM
    > Subject: [noparse][[/noparse]basicstamps] servo problems
    >
    > > I have a Futaba Servo FP-S3003 a light weight standard servo. I
    > > want to turn this servo into a motor. I already snipped off the
    > > black tab inside of the 2 servos. The servos are not moving when
    > > I send them a current. They are making humming noises. Does
    > > anyone have any suggestions or tips that will make these servos
    > > work?
    > >
  • ArchiverArchiver Posts: 46,084
    edited 2000-12-18 23:04
    Check out this page: http://robotics.bizland.com/download.htm

    At the bottom of the page is a link to a PDF file for modifying the
    servo for continuous operation. I like this document because it shows a
    little picture of the "resistor package" that will replace the pot, AND
    it is specifically for the S3003.

    I'm assuming that when you say "turning it into a motor" that you mean a
    motor you can control forward/backward, right? The S3003 has two stop
    mechanisms; 1) the tab on the black gear, and 2) the pot itself.

    I've modified these servos using the instructions in the document above,
    and everything went fine. I did cheat a little by only cutting off the
    pot and leaving the legs in place. Then soldering the resistors to the
    remaining pot legs, but the theory is the same.









    fractal wrote:
    >
    > Hi,
    >
    > Just to clarify, the main shaft is the big black gear inside the servo
    > that the allows the wheel to connect to the servo, Right?
    >
    > If I do scrape out the "+" from the inside of the main shaft, then
    > will the servo still be able to turn the main shaft gear? If the "+"
    > is removed from the inside of the main shaft won't this kill the
    > servo?
    >
    > Thanks,
    > fractal
    >
    > --- In basicstamps@egroups.com, "William Cox" <william@c...> wrote:
    > > You will also have to drill out the "+" shaped formation inside the
    > > main shaft. That will turn the pot, which won't do a full
    > > revolution. For more info on hacking this type of servo visit
    > > http://www.gorobotics.net/servohack.shtml
    > > -William
    > > GoRobotics.net
    > >
    > >
    Original Message
    > > From: fractal <fractal@w...>
    > > To: <basicstamps@egroups.com>
    > > Sent: Monday, December 18, 2000 8:56 AM
    > > Subject: [noparse][[/noparse]basicstamps] servo problems
    > >
    > > > I have a Futaba Servo FP-S3003 a light weight standard servo. I
    > > > want to turn this servo into a motor. I already snipped off the
    > > > black tab inside of the 2 servos. The servos are not moving when
    > > > I send them a current. They are making humming noises. Does
    > > > anyone have any suggestions or tips that will make these servos
    > > > work?
    > > >
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