multiple stepper motors - escapement
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--- In basicstamps@yahoogroups.com, "howgreen2003" <greenhf@l...>
wrote:
> David, sorry to tell you this, but it wasn't all my own work. In
fact
> very little of it was.
> I've bought a BS2 and Board of education. Also downloaded
Stampworks
> from Parallax. The project to run a single stepper is in that. All
> I've done is modify the program ever so slightly.
> However, there is still enough space on the BS2 to run a second
> stepper in the same manner. But that's all. Hence my need for
> expansion.
>
> Just to explain if you're using a Stamp powered a different way.
The
> BS2 is only powered by a 9V battery, regulated to 5 volts on the
> B.O.E. All other components are on a separate prototye board which
> had a regulated 12 power supply attached to it. That was what was
> driving the stepper.
>
> Incidentally, my project is to run what is essentially a fruit
> machine/one armed bandit type mechanism, but instead of the reels
> displaying fruits etc. it will have rubber stamps attached to the
> reels. This is all because the outfit I work for is composed of
> technophobes who think it's a good idea to have a man manually
> stamping the product as it comes off the production line!
>
> The initial objective is to get the first three motors able to go
> from 1 to 999. Then once the technophobes know it's a feasible
> project, they'll invest in extra hardware and add the additional
> resources to enable the product code to also be rubber stamped
> automatically.
>
> Regards,
> Howard.
cool, it sounds like you have not only the project, but also a little
corporate sponsored funding !
being a simple mechanical guy who dabbles in electronical stuff, the
first idea that pops in my head is a simple set of solenoids and a
clock type escapment. may offer too many wear points.
second is single stepper and a bunch of clutches on a single
driveshaft. pull apart a copy machine that has multiple paper
drawers. The shaft goes thru the clutch, and when energized, the
clutch will spin. probably not a good idea for this as you don't
have exact posistion control once the clutch releases.
steppers, and either gears or timing belts would work, considder a
reflective surface between each letter for feedback registration and
some home method. I have often wondered about a double bright or
half bright spots for some second level of reading and not using a
second reflector.
Personally, I am keeping an eye open for anything to do with spray
heads. I know there are dot matrix box printers with one line head.
the box moves past and the unit prints on the fly. text, barcode....
homebrew circuit boards !
I think they use an encoder connected to the printing head so as the
box rolls the printing occurs at the box speed.
and of course, there are lasers that mark serial numbers, but now
you're getting real fancy (and expensive)
Dave
wrote:
> David, sorry to tell you this, but it wasn't all my own work. In
fact
> very little of it was.
> I've bought a BS2 and Board of education. Also downloaded
Stampworks
> from Parallax. The project to run a single stepper is in that. All
> I've done is modify the program ever so slightly.
> However, there is still enough space on the BS2 to run a second
> stepper in the same manner. But that's all. Hence my need for
> expansion.
>
> Just to explain if you're using a Stamp powered a different way.
The
> BS2 is only powered by a 9V battery, regulated to 5 volts on the
> B.O.E. All other components are on a separate prototye board which
> had a regulated 12 power supply attached to it. That was what was
> driving the stepper.
>
> Incidentally, my project is to run what is essentially a fruit
> machine/one armed bandit type mechanism, but instead of the reels
> displaying fruits etc. it will have rubber stamps attached to the
> reels. This is all because the outfit I work for is composed of
> technophobes who think it's a good idea to have a man manually
> stamping the product as it comes off the production line!
>
> The initial objective is to get the first three motors able to go
> from 1 to 999. Then once the technophobes know it's a feasible
> project, they'll invest in extra hardware and add the additional
> resources to enable the product code to also be rubber stamped
> automatically.
>
> Regards,
> Howard.
cool, it sounds like you have not only the project, but also a little
corporate sponsored funding !
being a simple mechanical guy who dabbles in electronical stuff, the
first idea that pops in my head is a simple set of solenoids and a
clock type escapment. may offer too many wear points.
second is single stepper and a bunch of clutches on a single
driveshaft. pull apart a copy machine that has multiple paper
drawers. The shaft goes thru the clutch, and when energized, the
clutch will spin. probably not a good idea for this as you don't
have exact posistion control once the clutch releases.
steppers, and either gears or timing belts would work, considder a
reflective surface between each letter for feedback registration and
some home method. I have often wondered about a double bright or
half bright spots for some second level of reading and not using a
second reflector.
Personally, I am keeping an eye open for anything to do with spray
heads. I know there are dot matrix box printers with one line head.
the box moves past and the unit prints on the fly. text, barcode....
homebrew circuit boards !
I think they use an encoder connected to the printing head so as the
box rolls the printing occurs at the box speed.
and of course, there are lasers that mark serial numbers, but now
you're getting real fancy (and expensive)
Dave
Comments
You can use a single stepper to rotate a drum with the (ink) stamps on the
circumference. In the center of the drum you would have an air operated ram.
When the proper stamp is rotated over the fruit, a solenoid opens and air
pressure will mash the stamp. You can get some fine 'Stomp' control with air
pressure
adjustments.
You could also use another air solenoid to operate a ratchet mechanism that
rotates the drum. You could keep track of the pulses to the ratchet, and know
which stamp is lined up. A switch that closes once per revolution would keep
the control loop semi closed.
With this setup you need no steppers and the Basic Stamp will have plenty of
horsepower for this type of application.
This is a good industrial application for a Basic Stamp.
My company will soon release a Stamp II industrial control PCB that used off
the shelf Solid State I/O Modules. This makes the wiring very simple and easy
to duplicate.
Contact me off list if you need any help with this application.
Alan Bradford
Plasma Technologies
<A HREF="www.plasmatechnologies.com">www.plasmatechnologies.com</A>
and soon
<A HREF="www.stamplc.com">www.stamplc.com</A>
In a message dated 8/15/2003 11:51:15 AM Eastern Daylight Time,
davemucha@j... writes:
> --- In basicstamps@yahoogroups.com, "howgreen2003" <greenhf@l...>
> wrote:
> >David, sorry to tell you this, but it wasn't all my own work. In
> fact
> >very little of it was.
> >I've bought a BS2 and Board of education. Also downloaded
> Stampworks
> >from Parallax. The project to run a single stepper is in that. All
> >I've done is modify the program ever so slightly.
> >However, there is still enough space on the BS2 to run a second
> >stepper in the same manner. But that's all. Hence my need for
> >expansion.
> >
> >Just to explain if you're using a Stamp powered a different way.
> The
> >BS2 is only powered by a 9V battery, regulated to 5 volts on the
> >B.O.E. All other components are on a separate prototye board which
> >had a regulated 12 power supply attached to it. That was what was
> >driving the stepper.
> >
> >Incidentally, my project is to run what is essentially a fruit
> >machine/one armed bandit type mechanism, but instead of the reels
> >displaying fruits etc. it will have rubber stamps attached to the
> >reels. This is all because the outfit I work for is composed of
> >technophobes who think it's a good idea to have a man manually
> >stamping the product as it comes off the production line!
> >
> >The initial objective is to get the first three motors able to go
> >from 1 to 999. Then once the technophobes know it's a feasible
> >project, they'll invest in extra hardware and add the additional
> >resources to enable the product code to also be rubber stamped
> >automatically.
> >
> >Regards,
> >Howard.
>
>
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