Subject:
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RE: Question for Fred
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Newsgroups:
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lugnet.robotics.handyboard
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Date:
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Tue, 8 Dec 1998 21:24:29 GMT
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Original-From:
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Bill Denzel <WDENZEL@POLYMAIL.CPUNIX.avoidspamCALPOLY.EDU>
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Viewed:
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1084 times
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That's a funny question. I just finished a class on this exact topic. The
basic determining factors when deciding whether to use a stepper motor or a
DC brush/less servo motor is speed and open/closed loop control. Stepper
motors are limited to about 3000 RPM. You should also determine whether to
use open or closed-loop control. Closed loop control should be used when
the accuracy required is submicron (or ~0.00004 in), or when the cost of
position loss is higher than the cost of implementing a closed loop system.
DC servo motors should be used when there is a need for closed-loop control.
If you decide to use a closed-loop DC servo system, there are many
vendor-supplied cards that are a much preferred route rather that trying to
design a closed loop system. Hope this helps!
Bill Denzel
Senior Mechatronics Student
California Polytechnic State University
San Luis Obispo
> -----Original Message-----
> From: hachemi mechlih [mailto:hachemi@hotmail.com]
> Sent: Wednesday, December 09, 1998 4:56 AM
> To: fredm@media.mit.edu; handyboard@media.mit.edu
> Cc: hachemi@hotmail.com
> Subject: Question for Fred
>
>
> Hi Fred
>
> I have question for you. I have to control a position using the
> miniborad or the handyboard. And I don't know which motors is good the
> DC servo motor or the stepper motor and whats the diffrence?
> Another question if you don't mind, have you done or someone you know
> position control using either the miniboard or the handyboard and is it
> accurate?
>
> Thanx verymuch in advance
>
>
>
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Message is in Reply To:
 | | Question for Fred
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| Hi Fred I have question for you. I have to control a position using the miniborad or the handyboard. And I don't know which motors is good the DC servo motor or the stepper motor and whats the diffrence? Another question if you don't mind, have you (...) (26 years ago, 9-Dec-98, to lugnet.robotics.handyboard)
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