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Amiga Plus 1995 #5 & #6
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Amiga Plus CD - 1995 - No. 5 and 6.iso
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000498_owner-lightwave-l _Fri Mar 24 11:10:44 1995.msg
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id EAA05200; Fri, 24 Mar 1995 04:26:17 -0800
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From: PalaBart@aol.com
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(1.37.109.11/16.2) id AA023359224; Thu, 23 Mar 1995 23:27:05 -0500
Date: Thu, 23 Mar 1995 23:27:05 -0500
Message-Id: <950323232701_59449589@aol.com>
To: lightwave-l@netcom.com
Subject: Re: SCREW MODEL
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Erik C. Elvgren Thu Mar 23 1995 Wrote:
EC>I'm trying to model a screw
EC>how would you go
EC> about making the part that winds down to a point?
Here's how I did it:
1. Make a flat triangle (use disk with 3 sides and no depth).
2. Rotate it if needed so that one side is parallel with the axis of the
screw.
3. Move the triangle away from center in 1D, one-half the width of the base
of the screw.
4. Lathe 360 deg with an offset of exactly the width (or less) of one side of
the triangle. The offset determines the pitch of the screw. What you now
have is, to coin a phrase. "one turn of the screw".
5. Clone as many as you need to make up the length of the screw, offset
exactly half the length of one turn.
6. Taper.
This will make a wood screw. For a machine screw use a trapezoid on it's
side instead of a triangle, and don't taper.
By the way, offset doesn't seem to work right in my version of 3.1. Keeps
reverting to meters. So if you don't have 3.5, you may have to make a REALLY
BIG screw, then size it.
Enjoy
Bart Palamaro
Dark Horse Productions
palabart@aol.com