Driving multiple Steppers with Serial Servo Controller

Archiver

Colleagues,

I want to run two Steppers from a Stamp, but the stepper is too busy
to send pulses. In this forum I saw a message, which said that there
is an IC, which serially communicates with the processor, and sends
pulses to the stepper, so processor is free to do other stuff. I can
not fing that message. Could anyone post the reference to that
part(s) please?

Thanks,
Nick

Archiver

Nick

I have been using the Serial servo controler from Milford
Instruments. See www.milinst.com. They are in the U.K.
They have a wide variety of kits.
Basically you need a PIC controller to control the servo's, but
ready made kit takes the hassle out of building, and getting it
wrong, which could prove costly.

I have a problem . I am writing code to control the servo's via BS2,
but am having difficulty in determining where the Servo position is
exactly.

Upon power up I have written the first line of code to send servo to
a default central position. This I know works fine.
But I'm finding it difficult to determine their position if they are
then moved, left then right. I'm using the Serout command (see below)

Postion = 100 ' Central position for servo
serout signal,n96n,[noparse][[/noparse]sync,servo,position] 'send servo to centre

Any ideas would be appreciated ?

Chris-H


--- In basicstamps@yahoogroups.com, "Nick Alexeev <kender_a@y...>"
<kender_a@y...> wrote:
> Colleagues,
>
> I want to run two Steppers from a Stamp, but the stepper is too
busy
> to send pulses. In this forum I saw a message, which said that
there
> is an IC, which serially communicates with the processor, and sends
> pulses to the stepper, so processor is free to do other stuff. I
can
> not fing that message. Could anyone post the reference to that
> part(s) please?
>
> Thanks,
> Nick

Archiver

Hi,

I also have a multiple servo controller, not from Milford insts though but it
was included on a Lynx robotarm. This robot has 5 servos and also came with a
software program which takes the fun out of writing any code but is very easy
to use.
As sevos only have their own internal feedback system I would expect your
code will have to "remember" where you asked the servo to go to and presume
it went and stayed there. Otherwise you will need a separate position
feedback device on every servo.

Stuart



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