Sumo won''t turn and moves slowly
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Posts: 46,084
Hello from Gregg C. Levine
Very astute of you, Jon.
But as you might have noticed, I mentioned that there are three
different kinds of PWM output, one is indeed for servomechanisms, such
as the ones worn by the robot, and the next one is for the DC motor
drive systems, which is indeed not used here, and the third is the
rarely used power supply systems.
Without seeing the code being used, I suspected at first that the
fault lay within the construction of the PWM statements. I now believe
my earlier belief to be an accurate one, in view of your earlier
statements. However, to confirm this analysis what we need to see is
the complete code. I suggest that it should be posted.
Gregg C Levine hansolofalcon@w...
"The Force will be with you...Always." Obi-Wan Kenobi
"Use the Force, Luke."· Obi-Wan Kenobi
>
Original Message
> From: Jon Williams [noparse]/noparse]mailto:[url=http://forums.parallaxinc.com/group/basicstamps/post?postID=pEhlFbPYsnB18r4DDghN5NkOr-GaDb_M0QsTckpiY1vS-zxjJ58u9OpXri3UVVps1EmSMUMFXRP60hqjxYdIMA]jwilliams@p...[/url
> Sent: Sunday, April 11, 2004 1:47 PM
> To: basicstamps@yahoogroups.com
> Subject: RE: [noparse][[/noparse]basicstamps] re: Sumo won't turn and moves slowly
>
> The SumoBot uses servos for locomotion so it doesn't use the kind of
PWM signal
> intended for DC motors.
>
> -- Jon Williams
> -- Applications Engineer, Parallax
> -- Dallas Office
>
>
>
Original Message
> From: Eliza Yasmin [noparse]/noparse]mailto:[url=http://forums.parallaxinc.com/group/basicstamps/post?postID=TTY7O5PEdKAgj36hbITXAVM3SEjkwCFNosXBLiEMJSi9gISL379aa9vzgxaugHePN_jsYWSEAwVBKi7AJaWiTg]eliza_yasmin@y...[/url
> Sent: Sunday, April 11, 2004 12:02 PM
> To: basicstamps@yahoogroups.com
> Subject: RE: [noparse][[/noparse]basicstamps] re: Sumo won't turn and moves slowly
>
>
> Hello Gregg,
>
> Looks like this topic is very new to me. My question
> is related to the SumoBot. I'm new with the robot as
> well. Can someone assist me on my problem? Besides
> that, I'll also look up for PWM.
>
> Thanx.
>
> --- Gregg C Levine <hansolofalcon@w...>
> wrote:
> > Hello from Gregg C Levine
> > PWM - Pulse Width Modulation. It's used for DC motor
> > drive systems.
> > That includes servomechanisms. Some power supplies
> > use it as well.
> > Before we get into a semi-on-topic discussion here,
> > as this only
> > partly applies to the Stamps, I suggest you check
> > this subject out via
> > your public library.
> >
> > Gregg C Levine hansolofalcon@w...
> >
>
> > "The Force will be with you...Always." Obi-Wan
> > Kenobi
> > "Use the Force, Luke."· Obi-Wan Kenobi
> >
> > >
Original Message
> > > From: Eliza Yasmin [noparse]/noparse]mailto:[url=http://forums.parallaxinc.com/group/basicstamps/post?postID=TTY7O5PEdKAgj36hbITXAVM3SEjkwCFNosXBLiEMJSi9gISL379aa9vzgxaugHePN_jsYWSEAwVBKi7AJaWiTg]eliza_yasmin@y...[/url
> > > Sent: Sunday, April 11, 2004 12:15 PM
> > > To: basicstamps@yahoogroups.com
> > > Subject: Re: [noparse][[/noparse]basicstamps] re: Sumo won't turn and
> > moves slowly
> > >
> > > Dear George,
> > >
> > > I can't understand what u are saying. What is PWM?
> > Can
> > > u pls explain in details.
> > >
> > > Thanx.
> > >
> > >
> > > --- George Warner <geowar@a...> wrote:
> > > > > I have porgrammed a SumoBot to move forward
> > then
> > > > turn right. The
> > > > > problem is, the robot won't turn right as if
> > the
> > > > robot is heavy. But
> > > > > when I lift the robot, one wheel stop then the
> > > > other moves (I assumed
> > > > > the robot is doing what it is told). What
> > might
> > > > cause this to happen?
> > > > >
> > > > > I also have another problem. When the robot
> > moves
> > > > forward, it would
> > > > > stop sometimes. When I push a bit, the robot
> > would
> > > > moves again but
> > > > > slowly. Is there something wrong with the
> > coding?
> > > > >
> > > > > Appreciate ur help. Thanx in advance.
> > > >
> > > > I've actually seen this happen when you're
> > sending
> > > > the PWM to the servo's
> > > > too often (or not often enough).
> > > >
> > > > --
> > > > Enjoy,
> > > > George Warner,
> > > > Schizophrenic Optimization Scientists
> > > > Apple Developer Technical Support (DTS)
Very astute of you, Jon.
But as you might have noticed, I mentioned that there are three
different kinds of PWM output, one is indeed for servomechanisms, such
as the ones worn by the robot, and the next one is for the DC motor
drive systems, which is indeed not used here, and the third is the
rarely used power supply systems.
Without seeing the code being used, I suspected at first that the
fault lay within the construction of the PWM statements. I now believe
my earlier belief to be an accurate one, in view of your earlier
statements. However, to confirm this analysis what we need to see is
the complete code. I suggest that it should be posted.
Gregg C Levine hansolofalcon@w...
"The Force will be with you...Always." Obi-Wan Kenobi
"Use the Force, Luke."· Obi-Wan Kenobi
>
Original Message
> From: Jon Williams [noparse]/noparse]mailto:[url=http://forums.parallaxinc.com/group/basicstamps/post?postID=pEhlFbPYsnB18r4DDghN5NkOr-GaDb_M0QsTckpiY1vS-zxjJ58u9OpXri3UVVps1EmSMUMFXRP60hqjxYdIMA]jwilliams@p...[/url
> Sent: Sunday, April 11, 2004 1:47 PM
> To: basicstamps@yahoogroups.com
> Subject: RE: [noparse][[/noparse]basicstamps] re: Sumo won't turn and moves slowly
>
> The SumoBot uses servos for locomotion so it doesn't use the kind of
PWM signal
> intended for DC motors.
>
> -- Jon Williams
> -- Applications Engineer, Parallax
> -- Dallas Office
>
>
>
Original Message
> From: Eliza Yasmin [noparse]/noparse]mailto:[url=http://forums.parallaxinc.com/group/basicstamps/post?postID=TTY7O5PEdKAgj36hbITXAVM3SEjkwCFNosXBLiEMJSi9gISL379aa9vzgxaugHePN_jsYWSEAwVBKi7AJaWiTg]eliza_yasmin@y...[/url
> Sent: Sunday, April 11, 2004 12:02 PM
> To: basicstamps@yahoogroups.com
> Subject: RE: [noparse][[/noparse]basicstamps] re: Sumo won't turn and moves slowly
>
>
> Hello Gregg,
>
> Looks like this topic is very new to me. My question
> is related to the SumoBot. I'm new with the robot as
> well. Can someone assist me on my problem? Besides
> that, I'll also look up for PWM.
>
> Thanx.
>
> --- Gregg C Levine <hansolofalcon@w...>
> wrote:
> > Hello from Gregg C Levine
> > PWM - Pulse Width Modulation. It's used for DC motor
> > drive systems.
> > That includes servomechanisms. Some power supplies
> > use it as well.
> > Before we get into a semi-on-topic discussion here,
> > as this only
> > partly applies to the Stamps, I suggest you check
> > this subject out via
> > your public library.
> >
> > Gregg C Levine hansolofalcon@w...
> >
>
> > "The Force will be with you...Always." Obi-Wan
> > Kenobi
> > "Use the Force, Luke."· Obi-Wan Kenobi
> >
> > >
Original Message
> > > From: Eliza Yasmin [noparse]/noparse]mailto:[url=http://forums.parallaxinc.com/group/basicstamps/post?postID=TTY7O5PEdKAgj36hbITXAVM3SEjkwCFNosXBLiEMJSi9gISL379aa9vzgxaugHePN_jsYWSEAwVBKi7AJaWiTg]eliza_yasmin@y...[/url
> > > Sent: Sunday, April 11, 2004 12:15 PM
> > > To: basicstamps@yahoogroups.com
> > > Subject: Re: [noparse][[/noparse]basicstamps] re: Sumo won't turn and
> > moves slowly
> > >
> > > Dear George,
> > >
> > > I can't understand what u are saying. What is PWM?
> > Can
> > > u pls explain in details.
> > >
> > > Thanx.
> > >
> > >
> > > --- George Warner <geowar@a...> wrote:
> > > > > I have porgrammed a SumoBot to move forward
> > then
> > > > turn right. The
> > > > > problem is, the robot won't turn right as if
> > the
> > > > robot is heavy. But
> > > > > when I lift the robot, one wheel stop then the
> > > > other moves (I assumed
> > > > > the robot is doing what it is told). What
> > might
> > > > cause this to happen?
> > > > >
> > > > > I also have another problem. When the robot
> > moves
> > > > forward, it would
> > > > > stop sometimes. When I push a bit, the robot
> > would
> > > > moves again but
> > > > > slowly. Is there something wrong with the
> > coding?
> > > > >
> > > > > Appreciate ur help. Thanx in advance.
> > > >
> > > > I've actually seen this happen when you're
> > sending
> > > > the PWM to the servo's
> > > > too often (or not often enough).
> > > >
> > > > --
> > > > Enjoy,
> > > > George Warner,
> > > > Schizophrenic Optimization Scientists
> > > > Apple Developer Technical Support (DTS)