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Easy - put robot on diet from the start
Posted by Raul.
Engineer on team #111, Wildstang, from Rolling Meadows & Wheeling HS and Motorola. Posted on 1/25/2000 3:10 PM MST In Reply to: Re: enough rope to hang ourselves... posted by michael ciavaglia on 1/25/2000 4:25 AM MST: In past years, we always had a problem with weight. In 1999 we finally got smart and decided to plan for weight reduction in every single part. Rule #1: Every single part that can be legally modified can be made lighter. Most off the shelf parts are over-designed for our applications (ie.we webbed out all the gears that we bought). Rule #2: Know thy densities: Steel = 0.3 lbs/cu-in Aluminum = 0.1 lbs/cu-in Lexan = 0.045 lbs/cu-in PVC = 0.05 lbs/cu-in Aluminum can replace steel in 90% of your applications. Lexan is heavier than you think - don't make it too thick. 1/4' Lexan is much heavier than .060' Aluminum. Rule #3: A robot looks cooler when it has a structural look that you get by putting symmetric hole patterns in your large sheet parts. Raul |
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