Newsgroups: comp.robotics
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From: hgibson@pen.k12.va.us (Harold D. Gibson)
Subject: SERVOS VS STEPPERS
Message-ID: <CvD2Gy.1DvD@pen.k12.va.us>
Date: Tue, 30 Aug 1994 18:38:58 GMT
Organization: Virginia's Public Education Network
Lines: 26

What are the relative advantages of using servo motors in
robotic work versus stepper motors?  The literature I read says
that stepper motors are limited in the loads they can handle.
I need a motor that can lift 10 lbs. comfortably at all times.

I know that steppers are more easily controlled (Via PC and TTL
circuits) than servos.  In fact how can one control a servo to
turn only partially and to a fairly exact movement?

I also understand that modern robots (such as Disney) use
either pneumatic controls or hydraulic controls.  Any
inexpensive ways to achieve these controls?

Would a geared-down regular motor be useful in robotics work?
I am trying to build a robotic arm to use in a magic show and I
am trying to find the best possible way to accomplish it.

Also, does anyone have or know about a version of BASIC called
ARMBASIC (developed for TRS-80 machines in the early 80's)?

Does anyone know of any basic books describing the construction
of a robotic arm that would lift 10 lbs. or more?

Thanks for your assistance.

Harold at hgibson@vdoe386.vak12ed.edu
