Running Two Stepper Motors
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Posts: 46,084
I am building a large (4'x 7') scroller similar to those display
signs you see around. I have a demo unit that is using two large
steppers and being controlled by a PIC to motor driver and then
MOSFETs. They want $3000 for this unit and needless to say I think
that I could build it much cheaper. Questions- to run two steppers
and look for switches( initiate, limits, and possibly speed control)
could the 2sx do this quickly enough? To drive the higher load of the
larger than average steppers, I was planning to use a PAK 5(AWC are
you out there?) to a MOSFET. Is this the best device for this? Any
opinions, ideas appreciated. Ian
signs you see around. I have a demo unit that is using two large
steppers and being controlled by a PIC to motor driver and then
MOSFETs. They want $3000 for this unit and needless to say I think
that I could build it much cheaper. Questions- to run two steppers
and look for switches( initiate, limits, and possibly speed control)
could the 2sx do this quickly enough? To drive the higher load of the
larger than average steppers, I was planning to use a PAK 5(AWC are
you out there?) to a MOSFET. Is this the best device for this? Any
opinions, ideas appreciated. Ian
Comments
Check out the motor controller and driver chips from SGS-Thomson,
particularly the L297 and L298 combination.
Dennis
Original Message
From: iphillipsca <iphillips@s...>
[noparse]/noparse]mailto:[url=http://forums.parallaxinc.com/group/basicstamps/post?postID=axHt21nVd1DzTw1vl_0JTDt9KwA2JHimdFWV5B52ehjMv-0WKYODJyHxQ8YnvXyUiwf55pdQ22Ew3hBTyf1nuck]iphillips@s...[/url
Sent: Wednesday, January 15, 2003 6:32 AM
To: basicstamps@yahoogroups.com
Subject: [noparse][[/noparse]basicstamps] Running Two Stepper Motors
I am building a large (4'x 7') scroller similar to those display
signs you see around. I have a demo unit that is using two large
steppers and being controlled by a PIC to motor driver and then
MOSFETs. They want $3000 for this unit and needless to say I think
that I could build it much cheaper. Questions- to run two steppers
and look for switches( initiate, limits, and possibly speed control)
could the 2sx do this quickly enough? To drive the higher load of the
larger than average steppers, I was planning to use a PAK 5(AWC are
you out there?) to a MOSFET. Is this the best device for this? Any
opinions, ideas appreciated. Ian
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demo unit is rated at 3.1 amp, 2.9vdc. I'm also not sure what kind of a
signal you would send to the driver.
Original Message
From: Dennis P. O'Leary [noparse]/noparse]mailto:[url=http://forums.parallaxinc.com/group/basicstamps/post?postID=87bk_2OEvaAVSqJp5tWguxUFNN_p8TipBsjJiMBkCdP7j6Cn1giV1SFR9wNL-vG3qyS9uOqV1OakffQU47Dm]doleary@e...[/url
Sent: January 15, 2003 3:34 PM
To: basicstamps@yahoogroups.com
Subject: RE: [noparse][[/noparse]basicstamps] Running Two Stepper Motors
Ian -
Check out the motor controller and driver chips from SGS-Thomson,
particularly the L297 and L298 combination.
Dennis
Original Message
From: iphillipsca <iphillips@s...>
[noparse]/noparse]mailto:[url=http://forums.parallaxinc.com/group/basicstamps/post?postID=TXTQwnefHIHGxgGRnrgJoQ1rDm98F0YsqD0wFmdC1hUMWI7X_SyZ2n9neZ5ml6IE_Z0O_-gLxUEUoFqVkXu0o6Y]iphillips@s...[/url
Sent: Wednesday, January 15, 2003 6:32 AM
To: basicstamps@yahoogroups.com
Subject: [noparse][[/noparse]basicstamps] Running Two Stepper Motors
I am building a large (4'x 7') scroller similar to those display
signs you see around. I have a demo unit that is using two large
steppers and being controlled by a PIC to motor driver and then
MOSFETs. They want $3000 for this unit and needless to say I think
that I could build it much cheaper. Questions- to run two steppers
and look for switches( initiate, limits, and possibly speed control)
could the 2sx do this quickly enough? To drive the higher load of the
larger than average steppers, I was planning to use a PAK 5(AWC are
you out there?) to a MOSFET. Is this the best device for this? Any
opinions, ideas appreciated. Ian
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controller, driven by logic from PICs/Stamps. Then, send the L297 logic
outputs to a quad darlington array, with current capacity and heat sinks
large enough for your 3.1 amps. Also, 2.9 vdc is really low for a
stepper.
Dennis
Original Message
From: Ian Phillips [noparse]/noparse]mailto:[url=http://forums.parallaxinc.com/group/basicstamps/post?postID=3CwDqD4BD_5UnLs9mFUSg6VnsD_A0kSRdunKQ9deaFq2eChKDawngoekr90JlIE1dS-EeMcZuP35aEzk0A]iphillips@s...[/url
Sent: Wednesday, January 15, 2003 12:40 PM
To: basicstamps@yahoogroups.com
Subject: RE: [noparse][[/noparse]basicstamps] Running Two Stepper Motors
I have looked at these but the amperage is to low. The stepper in the
demo unit is rated at 3.1 amp, 2.9vdc. I'm also not sure what kind of a
signal you would send to the driver.
Original Message
From: Dennis P. O'Leary [noparse]/noparse]mailto:[url=http://forums.parallaxinc.com/group/basicstamps/post?postID=Qi0Mese1Nb6_WVck3TzsAt4OnUvsDSgaUqy3VZg9So5Xrj-84A5hPqNGY0h6t8deaBS9C8UviW0k2UQnEaaV]doleary@e...[/url
Sent: January 15, 2003 3:34 PM
To: basicstamps@yahoogroups.com
Subject: RE: [noparse][[/noparse]basicstamps] Running Two Stepper Motors
Ian -
Check out the motor controller and driver chips from SGS-Thomson,
particularly the L297 and L298 combination.
Dennis
Original Message
From: iphillipsca <iphillips@s...>
[noparse]/noparse]mailto:[url=http://forums.parallaxinc.com/group/basicstamps/post?postID=3CwDqD4BD_5UnLs9mFUSg6VnsD_A0kSRdunKQ9deaFq2eChKDawngoekr90JlIE1dS-EeMcZuP35aEzk0A]iphillips@s...[/url
Sent: Wednesday, January 15, 2003 6:32 AM
To: basicstamps@yahoogroups.com
Subject: [noparse][[/noparse]basicstamps] Running Two Stepper Motors
I am building a large (4'x 7') scroller similar to those display
signs you see around. I have a demo unit that is using two large
steppers and being controlled by a PIC to motor driver and then
MOSFETs. They want $3000 for this unit and needless to say I think
that I could build it much cheaper. Questions- to run two steppers
and look for switches( initiate, limits, and possibly speed control)
could the 2sx do this quickly enough? To drive the higher load of the
larger than average steppers, I was planning to use a PAK 5(AWC are
you out there?) to a MOSFET. Is this the best device for this? Any
opinions, ideas appreciated. Ian
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are out of Japan. As for the voltage, I probably won't get exactly the
same motor, but I will need the same torque.
Ian
Original Message
From: Dennis P. O'Leary [noparse]/noparse]mailto:[url=http://forums.parallaxinc.com/group/basicstamps/post?postID=kBfd8qMN2sY_Xcyc5BZUEz2PcwyBJq19A7PzIC6pkR8OY5h-DBsFNR3nhMlAxeTIxIRZow8sdxQT3xta1w]doleary@e...[/url
Sent: January 15, 2003 4:44 PM
To: basicstamps@yahoogroups.com
Subject: RE: [noparse][[/noparse]basicstamps] Running Two Stepper Motors
Unipolar or bipolar steppers? If unipolar, you can still use the L297
controller, driven by logic from PICs/Stamps. Then, send the L297 logic
outputs to a quad darlington array, with current capacity and heat sinks
large enough for your 3.1 amps. Also, 2.9 vdc is really low for a
stepper.
Dennis
Original Message
From: Ian Phillips [noparse]/noparse]mailto:[url=http://forums.parallaxinc.com/group/basicstamps/post?postID=capdZ_wyMrsAWKiddi4Ng8KA9AD00D8z55kJnKeXfPmnpKo19fGXeVxvfhXBwuJHB7TszWMB30C5wdaN]iphillips@s...[/url
Sent: Wednesday, January 15, 2003 12:40 PM
To: basicstamps@yahoogroups.com
Subject: RE: [noparse][[/noparse]basicstamps] Running Two Stepper Motors
I have looked at these but the amperage is to low. The stepper in the
demo unit is rated at 3.1 amp, 2.9vdc. I'm also not sure what kind of a
signal you would send to the driver.
you can "push" it with 2 to 4 times the voltage.
Sigma Stepping motors used to say "if the paint doesn't turn black they're
not too hot"
Original Message
From: Ian Phillips [noparse]/noparse]mailto:[url=http://forums.parallaxinc.com/group/basicstamps/post?postID=khgT7WWFi065uS6pLct4VJd1E-dWpMHMJQMQFLKYlYP0O3_5pOrM6LQFo7gMZBm3LCj4XsTJxDgBVL0s]iphillips@s...[/url
Sent: Wednesday, January 15, 2003 4:55 PM
To: basicstamps@yahoogroups.com
Subject: RE: [noparse][[/noparse]basicstamps] Running Two Stepper Motors
Unipolar I think (six wires). The unit was made in Belgium the motors
are out of Japan. As for the voltage, I probably won't get exactly the
same motor, but I will need the same torque.
Ian
Original Message
From: Dennis P. O'Leary [noparse]/noparse]mailto:[url=http://forums.parallaxinc.com/group/basicstamps/post?postID=mH_UbGmCOdYIGC2ZJ_XHwTqqtYoDRMBFUGf6hZ1MkU2C8QE7v9rmkFTga17UxskCiVZHBwz5sB0No3QqxuRoJw]doleary@e...[/url
Sent: January 15, 2003 4:44 PM
To: basicstamps@yahoogroups.com
Subject: RE: [noparse][[/noparse]basicstamps] Running Two Stepper Motors
Unipolar or bipolar steppers? If unipolar, you can still use the L297
controller, driven by logic from PICs/Stamps. Then, send the L297 logic
outputs to a quad darlington array, with current capacity and heat sinks
large enough for your 3.1 amps. Also, 2.9 vdc is really low for a
stepper.
Dennis
Original Message
From: Ian Phillips [noparse]/noparse]mailto:[url=http://forums.parallaxinc.com/group/basicstamps/post?postID=khgT7WWFi065uS6pLct4VJd1E-dWpMHMJQMQFLKYlYP0O3_5pOrM6LQFo7gMZBm3LCj4XsTJxDgBVL0s]iphillips@s...[/url
Sent: Wednesday, January 15, 2003 12:40 PM
To: basicstamps@yahoogroups.com
Subject: RE: [noparse][[/noparse]basicstamps] Running Two Stepper Motors
I have looked at these but the amperage is to low. The stepper in the
demo unit is rated at 3.1 amp, 2.9vdc. I'm also not sure what kind of a
signal you would send to the driver.
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[noparse][[/noparse]Non-text portions of this message have been removed]
http://eu.st.com/stonline/profiles/powerapplications/index.shtml. Do a
search on this site for L297 Application Note. Figure 22 in this note
shows how to use a unipolar motor with the L297 controller. If you're
doing anything complex with microstepping, fast direction changes, etc.,
using a controller will save a lot of developer time over programming
your own stepper codes. I've done it both ways.
Dennis
Original Message
From: Ian Phillips [noparse]/noparse]mailto:[url=http://forums.parallaxinc.com/group/basicstamps/post?postID=rRh57Kohq9lgz2QJIQhnixnHKQ4_11fx6IkvVw22bapW-HL2t29WfU5GeXS0z6UNReepfdPimXtpHE73tQjQrkY]iphillips@s...[/url
Sent: Wednesday, January 15, 2003 1:55 PM
To: basicstamps@yahoogroups.com
Subject: RE: [noparse][[/noparse]basicstamps] Running Two Stepper Motors
Unipolar I think (six wires). The unit was made in Belgium the motors
are out of Japan. As for the voltage, I probably won't get exactly the
same motor, but I will need the same torque. Ian
Original Message
From: Dennis P. O'Leary [noparse]/noparse]mailto:[url=http://forums.parallaxinc.com/group/basicstamps/post?postID=DEmkS3wjnm1p9HAtK8RNG8hC49Zu69L2Yt2OhGLuznpBiF5gg5g0C_yBg-Ye_bav28Ip2D-aTF85EMOiYHA]doleary@e...[/url
Sent: January 15, 2003 4:44 PM
To: basicstamps@yahoogroups.com
Subject: RE: [noparse][[/noparse]basicstamps] Running Two Stepper Motors
Unipolar or bipolar steppers? If unipolar, you can still use the L297
controller, driven by logic from PICs/Stamps. Then, send the L297 logic
outputs to a quad darlington array, with current capacity and heat sinks
large enough for your 3.1 amps. Also, 2.9 vdc is really low for a
stepper.
Dennis
Original Message
From: Ian Phillips [noparse]/noparse]mailto:[url=http://forums.parallaxinc.com/group/basicstamps/post?postID=rRh57Kohq9lgz2QJIQhnixnHKQ4_11fx6IkvVw22bapW-HL2t29WfU5GeXS0z6UNReepfdPimXtpHE73tQjQrkY]iphillips@s...[/url
Sent: Wednesday, January 15, 2003 12:40 PM
To: basicstamps@yahoogroups.com
Subject: RE: [noparse][[/noparse]basicstamps] Running Two Stepper Motors
I have looked at these but the amperage is to low. The stepper in the
demo unit is rated at 3.1 amp, 2.9vdc. I'm also not sure what kind of a
signal you would send to the driver.
To UNSUBSCRIBE, just send mail to:
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I hope this gets posted, this is my third attempt to reply. seems
either my posts are being delayed or the yahoo is increasing how long
it takes to post.
{this is the short version}
to drive a stepper, you need to use 2 pins. one for direction.
forward or reverse. the pin is high or low. pretty simple.
the second pin is for speed. most stepper drivers are step and
direction and receive a control pulse. each pulse equal one step.
stepper motors are often 200 steps per revoltion.
If the stepper motor is a 200 steps per rev unit, you can find
drivers that will yield half step 1/4 step, or some fraction. 10
micro steps is what I am used to. some drivers run as many as 256
microsteps or 200 x 256 pulses per revolution.
figure out how fast you need to go, what power you need, what your
gearing ration will be then how fast you would need to pulse to
achieve that speed.
I'll end here and see if this gets posted. I checked my yahoo
account into (on the basicstamps web page, upper right) and found
yahoo changed my account to receive as much advertising as yahoo
could send, yuch. maybe that is why I had to re-join the group)
Dave
--- In basicstamps@yahoogroups.com, "Ian Phillips" <iphillips@s...>
wrote:
> I have looked at these but the amperage is to low. The stepper in
the
> demo unit is rated at 3.1 amp, 2.9vdc. I'm also not sure what kind
of a
> signal you would send to the driver.
>
>
Original Message
> From: Dennis P. O'Leary [noparse][[/noparse]mailto:doleary@e...]
> Sent: January 15, 2003 3:34 PM
> To: basicstamps@yahoogroups.com
> Subject: RE: [noparse][[/noparse]basicstamps] Running Two Stepper Motors
>
> Ian -
>
> Check out the motor controller and driver chips from SGS-Thomson,
> particularly the L297 and L298 combination.
>
> Dennis
>
>
Original Message
> From: iphillipsca <iphillips@s...>
> [noparse][[/noparse]mailto:iphillips@s...]
> Sent: Wednesday, January 15, 2003 6:32 AM
> To: basicstamps@yahoogroups.com
> Subject: [noparse][[/noparse]basicstamps] Running Two Stepper Motors
>
>
> I am building a large (4'x 7') scroller similar to those display
> signs you see around. I have a demo unit that is using two large
> steppers and being controlled by a PIC to motor driver and then
> MOSFETs. They want $3000 for this unit and needless to say I think
> that I could build it much cheaper. Questions- to run two steppers
> and look for switches( initiate, limits, and possibly speed
control)
> could the 2sx do this quickly enough? To drive the higher load of
the
> larger than average steppers, I was planning to use a PAK 5(AWC are
> you out there?) to a MOSFET. Is this the best device for this? Any
> opinions, ideas appreciated. Ian
>
>
> To UNSUBSCRIBE, just send mail to:
> basicstamps-unsubscribe@yahoogroups.com
> from the same email address that you subscribed. Text in the
Subject
> and Body of the message will be ignored.
>
>
> Your use of Yahoo! Groups is subject to
> http://docs.yahoo.com/info/terms/
>
>
>
>
>
> To UNSUBSCRIBE, just send mail to:
> basicstamps-unsubscribe@yahoogroups.com
> from the same email address that you subscribed. Text in the
Subject
> and Body of the message will be ignored.
>
>
> Your use of Yahoo! Groups is subject to
> http://docs.yahoo.com/info/terms/