Newsgroups: comp.robotics
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From: kilian@cray.com (Alan Kilian)
Subject: Motor question
Message-ID: <1994Oct11.153152.21837@driftwood.cray.com>
Lines: 31
Nntp-Posting-Host: poplar010
Organization: Cray Research, Inc.
Date: 11 Oct 94 15:31:52 CDT


Here's the deal.

I have a nice smooth gearbox that has a 10:1 reduction ratio.

I want to build a robot of about 50 pounds that roams around the office.
The office has carpets that are very smooth.

The gearboxes have smallish stepper motors on them right now.

I would like to know if replacing them with:

1) Larger stepper motors

    or

2) Larger DC brushed motors 

Would one be more battery efficient than the other?

I will be driving the DC motor with a PWM controlled H-Bridge

I will be driving the steppers with a low-side MOSFET single polarity.

The steppers are low inertia 6-volt 3-amp steppers.

                -Alan Kilian
-- 
 -Alan Kilian    kilian@cray.com 612.683.5499 (Work)
  "Avoid cliches like the plague." 
  _How to write and publish a scientific paper_ Robert A. Day
