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Bzdega
07-29-2005, 01:05 AM
I have·some questions about using the Mitsumi·12V 4 phase Unipolar stepper motor.· First, I was planning on using the BASICstamp as the indexer and·two ULN2803 transitor drivers to run two stepper motors simultaniously.· However, after reading·the·literature·I want to make sure·I·will get the performance I need.· I need to have a lot of torque (around 8 kg-cm)·under varying loads to move a paddle through a pile of sand.· Does anyone have any suggestions or recommendations on this setup?· By the way, I can not use R/C servos because I need position control for a full 360+ degrees, unless you know an easy solution.· Thanks for the help and take care.

Paul Baker
07-29-2005, 01:28 AM
Here (http://eio.com/jasstep.htm) is a good article covering stepper motors. You'll want to drive it in full step mode to get the most torque possible since it is the only unipolar drive technique which always has two coils energized simultaneously.


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Amaral
07-29-2005, 06:33 AM
how about use an encoder with the servos ?

how precise your run must be ?

dandreae
07-30-2005, 11:25 PM
Amaral said...
how about use an encoder with the servos ?

how precise your run must be ?
Amaral,
Are you making a suggestion or are you asking about how to use an encoder with a servo?· We do offer encoders that can be used with servos.· Here is a link for more information:·http://www.parallax.com/detail.asp?product_id=28107·.

Dave

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Dave Andreae

Tech Support
dandreae@parallax.com (mailto:dandreae@parallax.com)
http://www.parallax.com

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