Allegro UCN5804
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Posts: 46,084
Anyone else here used a UCN5804? It's a stepper motor controller
in a 16-pin DIP package. Pretty easy to interface to a Stamp. You
really only need 2 pins: step and direction.
Data sheet can be found here:
http://www.allegromicro.com/datafile/5804.pdf
I've been playing around with one for a while now. Seems to work
fairly well. Not as sophisticated as the LittleStep-U module but
you can't beat the price (about $4).
Anyway, wanted to see if anyone else had tried these and what sort
of experiences they'd had.
SD
--
/===================================================================\
| Steve DeGroof (http://degroof.home.mindspring.com/) |
\===================================================================/
in a 16-pin DIP package. Pretty easy to interface to a Stamp. You
really only need 2 pins: step and direction.
Data sheet can be found here:
http://www.allegromicro.com/datafile/5804.pdf
I've been playing around with one for a while now. Seems to work
fairly well. Not as sophisticated as the LittleStep-U module but
you can't beat the price (about $4).
Anyway, wanted to see if anyone else had tried these and what sort
of experiences they'd had.
SD
--
/===================================================================\
| Steve DeGroof (http://degroof.home.mindspring.com/) |
\===================================================================/
Comments
At 08:43 PM 5/24/01 -0400, you wrote:
>Anyone else here used a UCN5804? It's a stepper motor controller
>in a 16-pin DIP package. Pretty easy to interface to a Stamp. You
>really only need 2 pins: step and direction.
>
>Data sheet can be found here:
>http://www.allegromicro.com/datafile/5804.pdf
>
>I've been playing around with one for a while now. Seems to work
>fairly well. Not as sophisticated as the LittleStep-U module but
>you can't beat the price (about $4).
>
>Anyway, wanted to see if anyone else had tried these and what sort
>of experiences they'd had.
>
>SD
>
>--
>/===================================================================\
>| Steve DeGroof (http://degroof.home.mindspring.com/) |
>\===================================================================/
>
>
>
>
>Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
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>
Roger Edberg
roger@industrialartist.com
http://www.industrialartist.com
also:
Technical Tree Service
> I use them and they work great!
>
What's the highest step rate you've gotten out of them? I've been
experimenting with them and so far I haven't been able to get more
than 100 steps/second without slipping.
I suspect it's because the stepper motors I'm using are too large
(too much inertia). I've got a couple of smaller motors on order.
I'll have to see how they do.
SD
--
/===================================================================\
| Steve DeGroof (http://degroof.home.mindspring.com/) |
\===================================================================/
you need is the step and direction as well. The outputs are also clamped to
protect them from the motors coils.
Original Message
From: "Steve DeGroof" <degroof@m...>
To: <basicstamps@yahoogroups.com>
Sent: Thursday, May 24, 2001 9:52 PM
Subject: Re: [noparse][[/noparse]basicstamps] Allegro UCN5804
> Roger Edberg wrote:
>
> > I use them and they work great!
> >
> What's the highest step rate you've gotten out of them? I've been
> experimenting with them and so far I haven't been able to get more
> than 100 steps/second without slipping.
>
> I suspect it's because the stepper motors I'm using are too large
> (too much inertia). I've got a couple of smaller motors on order.
> I'll have to see how they do.
>
> SD
> --
> /===================================================================\
> | Steve DeGroof (http://degroof.home.mindspring.com/) |
> \===================================================================/
>
>
>
>
> Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
>
>
>
The way I've got one setup geared, it takes 610 steps/in., and it will run about a five pound load at 30 in/min reliably. So that's (610*30)/60 or about 305 steps/sec.
Roger
At 10:52 PM 5/24/01 -0400, you wrote:
>Roger Edberg wrote:
>
>> I use them and they work great!
>>
>What's the highest step rate you've gotten out of them? I've been
>experimenting with them and so far I haven't been able to get more
>than 100 steps/second without slipping.
>
>I suspect it's because the stepper motors I'm using are too large
>(too much inertia). I've got a couple of smaller motors on order.
>I'll have to see how they do.
>
>SD
>--
>/===================================================================\
>| Steve DeGroof (http://degroof.home.mindspring.com/) |
>\===================================================================/
>
>
>
>
>Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
>
>
>
>
Roger Edberg
roger@industrialartist.com
http://www.industrialartist.com
also:
Technical Tree Service
>When I start to get skipped steps as I increase frequency, I've assumed
>(maybe incorrectly) that the motors did not have the torque to keep up
>with the steps.
>The way I've got one setup geared, it takes 610 steps/in., and it will run
>about a five pound load at 30 in/min reliably. So that's (610*30)/60 or
>about 305 steps/sec.
>Roger
>
>
Roger,
There are several reasons your stepper may be erratic. You're right about
not having enough torque. Also you could be at
the steppers resonant frequency. Steppers will miss steps and even step
backward/forward in this region. Half stepping
improves performance through the resonant frequency and micro stepping
usually eliminates it. Don't use "wave" drive which
powers only 1 phase at a time. The best torque is given when a 2 phase
step sequence is used, 2 phases on, 2 phases off.
If your doing this make sure you start the stepper at a step rate above its
resonant frequency. Last, your top speed may be
limited by the voltage your using. Powering a 5 volt 1 amp per phase
stepper motor with 5 volts will limit speed to about 400
Hertz. Running the same exact motor at 24 volts with a limiting resistor to
absorb 19 volts when 1 amp flows through it
( the stepper still sees 5 volts at 1 amp max ) will increase speed to the
2000 - 3000 hertz step rate. Rates higher than this
require micro stepping. If you knew all this, oh well, never mind!
Greg
At 12:00 PM 5/29/01 -0700, you wrote:
>At 04:53 PM 5/25/2001 , you wrote:
>>When I start to get skipped steps as I increase frequency, I've assumed
>>(maybe incorrectly) that the motors did not have the torque to keep up
>>with the steps.
>>The way I've got one setup geared, it takes 610 steps/in., and it will run
>>about a five pound load at 30 in/min reliably. So that's (610*30)/60 or
>>about 305 steps/sec.
>>Roger
>>
>>
>
>
>Roger,
>
>There are several reasons your stepper may be erratic. You're right about
>not having enough torque. Also you could be at
>the steppers resonant frequency. Steppers will miss steps and even step
>backward/forward in this region. Half stepping
>improves performance through the resonant frequency and micro stepping
>usually eliminates it. Don't use "wave" drive which
>powers only 1 phase at a time. The best torque is given when a 2 phase
>step sequence is used, 2 phases on, 2 phases off.
>If your doing this make sure you start the stepper at a step rate above its
>resonant frequency. Last, your top speed may be
>limited by the voltage your using. Powering a 5 volt 1 amp per phase
>stepper motor with 5 volts will limit speed to about 400
>Hertz. Running the same exact motor at 24 volts with a limiting resistor to
>absorb 19 volts when 1 amp flows through it
>( the stepper still sees 5 volts at 1 amp max ) will increase speed to the
>2000 - 3000 hertz step rate. Rates higher than this
>require micro stepping. If you knew all this, oh well, never mind!
>
>Greg
>
>
>
>
>
>Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
>
>
>
>
Roger Edberg
roger@industrialartist.com
http://www.industrialartist.com
also:
Technical Tree Service