[Robotgroup] BS2 to Sabretooth 2x10 RCMC?

[Paul Atkinson]

So your battery is Pb or lead, probably seal lead acid. That would be
non-lithium as far as the switches go. Not sure on the full speed
forward/back operation. You might want to hook up a scope and see if you are
really getting R/C signals - or just hook up a servo to the two controlling
channels and see if they act normallly - as in, see if they move smoothly
and follow the joystick from one extreme, through the center, to the other
extreme.

I'll look at the MC data sheet if I get a minute later.

Paul

On Wed, Aug 20, 2008 at 1:39 PM, LHudson <lhudson73 at yahoo.com> wrote:

> Ugh.
>
> It has two speeds:  really fast, and backwards really fast.
>
> ' {$STAMP BS2}
> ' {$PBASIC 2.5}
> DO
>   ' !-- Execute a Movement Command
>   PULSOUT 13, 750
>   PULSOUT 14, 750
>   PAUSE 20
> LOOP
>
> Anything >= 750 makes the motor go really fast.  Anything < 750 makes the
> motor go backwards really fast.  Responses posted to Parallax or Lynxmotion
> forums imply that the Sabretooth responds to the PULSOUT command in the same
> fashion as the BOE-BOT CR servos.  Just about every post seems to be
> resolved with "I connected it to the BS2 Ground and now it works".  However
> I don't see anything that looks like this in the wiring diagram.  Is this
> because they are using the Sabretooth 2x10 MC and not the RCMC?
>
> Also, it is impossible to stop the motors without yanking the wires leading
> from the RCMC to the motors.  I believe that turning off the BOE also stops
> the motors however usually I'm in some sort of panic state and forget to
> confirm this conclusively by writing it down or something.  If I disconnect
> the wires leading from the MC to the battery, the green power indicator LED
> remains lit.  However if I then switch off the BOE or disconnect the servo
> leads, the green power indicator turns off.
>
> These are the documents for this MC:
> http://www.dimensionengineering.com/datasheets/Sabertooth2x10RC.pdf
>
> http://www.dimensionengineering.com/datasheets/Sabertooth-2X10-RC-diagram.jpg
> http://www.dimensionengineering.com/datasheets/Sabertooth-2X10-RC-DIPs.jpg
>
> I am using this battery:
> http://www.hobbymasters.com/index.asp?PageAction=VIEWPROD&ProdID=382.
>
> Googling "Power Wheel 6 volt" returns a lot of batteries that are red, but
> mine is Blue.  I forgot to check last night to see if it was NiCD or Li.  I
> asked Bonnie to look and and she said neither -- "Pb".
>
> Anybody?
>
> L. Scott Hudson
>
> "There are known knowns. These are things we know that we know. There are
> known unknowns. That is to say, there are things we know we don't know. But,
> there are also unknown unknowns. These are things we don't know we don't
> know."
>
> -- Donald Rumsfeld, describing the IBM "Rational Software" Platform
>
>
>
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