Servo Stuff
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Posts: 46,084
I finally got my servo stuff working. Apparently there were some issues with
running the servo off the same batteries as the logic part of two MotorMind
B modules on my Robot. I noticed the two modules generated quite a bit of
noise on the power line -- I assume this was the problem with the jittery
servo.
I originally was running the motor power and Stamp power off one big 12 volt
gel-cell, and the servo and MotorMind logic off a 6-volt battery. Both
grounds were tied together. The servo moved, but jittered like mad no matter
what pulse rate and pause I used.
Anyhow, to save weight, I decided to ditch the second set of batteries and
run everything off one battery. The Basic Stamp is running off 12 volts and
the servo and MotorMind B modules are running through a 5 volt regulator off
the same battery. Now the servo moves smoothly.
running the servo off the same batteries as the logic part of two MotorMind
B modules on my Robot. I noticed the two modules generated quite a bit of
noise on the power line -- I assume this was the problem with the jittery
servo.
I originally was running the motor power and Stamp power off one big 12 volt
gel-cell, and the servo and MotorMind logic off a 6-volt battery. Both
grounds were tied together. The servo moved, but jittered like mad no matter
what pulse rate and pause I used.
Anyhow, to save weight, I decided to ditch the second set of batteries and
run everything off one battery. The Basic Stamp is running off 12 volts and
the servo and MotorMind B modules are running through a 5 volt regulator off
the same battery. Now the servo moves smoothly.
Comments
through it - I assumed it was a ground loop problem - thanks for info
richard
Original Message
From: "Rodent" <daweasel@s...>
To: <basicstamps@yahoogroups.com>
Sent: Monday, March 26, 2001 8:46 PM
Subject: [noparse][[/noparse]basicstamps] Servo Stuff
> I finally got my servo stuff working. Apparently there were some issues
with
> running the servo off the same batteries as the logic part of two
MotorMind
> B modules on my Robot. I noticed the two modules generated quite a bit of
> noise on the power line -- I assume this was the problem with the jittery
> servo.
>
> I originally was running the motor power and Stamp power off one big 12
volt
> gel-cell, and the servo and MotorMind logic off a 6-volt battery. Both
> grounds were tied together. The servo moved, but jittered like mad no
matter
> what pulse rate and pause I used.
>
> Anyhow, to save weight, I decided to ditch the second set of batteries and
> run everything off one battery. The Basic Stamp is running off 12 volts
and
> the servo and MotorMind B modules are running through a 5 volt regulator
off
> the same battery. Now the servo moves smoothly.
>
>
>
>
>
> Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
>
>
airplane, and they were very erratic. I bought a couple of the Futaba 148's
that everyone goes on about, and they had similar problems. I figured it was
a code problem, so I went back to swapping over to one power source.
When I finished getting everything going off one battery, the servo worked
fine. However, I don't believe the timing values for PULSOUT for the BS2sx
are correct -- I wound up with values of 400 to 3600 to move the servo 180
degrees.
Now that I am done, I gott a figure out what I want to do with the servos.
Original Message
> I have had similar problems - but didnt want to take the time to work
> through it - I assumed it was a ground loop problem - thanks for info
>
> richard
>
>
Original Message
> From: "Rodent" <daweasel@s...>
> To: <basicstamps@yahoogroups.com>
> Sent: Monday, March 26, 2001 8:46 PM
> Subject: [noparse][[/noparse]basicstamps] Servo Stuff
>
>
> > I finally got my servo stuff working. Apparently there were some issues
> with
> > running the servo off the same batteries as the logic part of two
> MotorMind
> > B modules on my Robot. I noticed the two modules generated quite a bit
of
> > noise on the power line -- I assume this was the problem with the
jittery
> > servo.
> >
> > I originally was running the motor power and Stamp power off one big 12
> volt
> > gel-cell, and the servo and MotorMind logic off a 6-volt battery. Both
> > grounds were tied together. The servo moved, but jittered like mad no
> matter
> > what pulse rate and pause I used.
> >
> > Anyhow, to save weight, I decided to ditch the second set of batteries
and
> > run everything off one battery. The Basic Stamp is running off 12 volts
> and
> > the servo and MotorMind B modules are running through a 5 volt regulator
> off
> > the same battery. Now the servo moves smoothly.
> >
> >
> >
> >
> >
> > Your use of Yahoo! Groups is subject to
http://docs.yahoo.com/info/terms/
> >
> >
>
>
>
>
> Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
>
>
>