CAD CAM EDM DRO - Yahoo Group Archive

RE: [CAD_CAM_EDM_DRO] Re: making an ali flexible coupler

on 2003-11-10 22:51:12 UTC
Hi Don,
Your explanation is quite good, but I have a little problems with
english. So, please, send some pictures about Ford's coupling
Peja

-----Original Message-----
From: Don Rogers [mailto:Don@...]
Sent: Tuesday, November 11, 2003 3:32 AM
To: CAD_CAM_EDM_DRO@yahoogroups.com
Subject: [CAD_CAM_EDM_DRO] Re: making an ali flexible coupler



>The rubber spider that's inserted between the two
>coupling halves allows for misalignment.

The spider coupling does not take kindly to mis-alignment. It will
tolerate a small amount of mis-alignment, but will wear out rather quickly
if there is more than an thousandths or two of vertical or horizontal miss
alignment, or more than a few minutes of angular mis-alignment. They can
transfer heavy loads though and do provide an vibration isolation between
shafts. The spider coupling is designed to be a single direction coupling,
so there is a lot of backlash in them. All in all, they are not a good
choice for a CNC coupling.

An easier home made coupling might be patterned off a old (1960s) Ford
steering column to steering box coupling. It was a hub that was attached
to the shaft, and had a very flat U shaped yoke with a flat surface
perpendicular to the shaft. These two halves were attached 90 degrees
apart on a rubber/fiber disk. It allowed for quite a bit of angular miss
alignment as well as some vertical or horizontal miss alignment, and
lasted for many years (unless you were in the mid-west and the floor boards
of your truck cab were rusting out). It also gave a very smooth and
undetectable backlash feel to the steering. I don't have a drawing but
could do a back of a napkin one if you wanted to see it.

Don




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Discussion Thread

Graham Stabler 2003-11-10 06:19:19 UTC making an ali flexible coupler dcdziner 2003-11-10 06:56:02 UTC Re: [CAD_CAM_EDM_DRO] making an ali flexible coupler Graham Stabler 2003-11-10 08:42:19 UTC Re: making an ali flexible coupler Dan 2003-11-10 09:01:06 UTC Re: [CAD_CAM_EDM_DRO] Re: making an ali flexible coupler Harvey White 2003-11-10 09:05:32 UTC Re: [CAD_CAM_EDM_DRO] Re: making an ali flexible coupler Jon Elson 2003-11-10 09:36:52 UTC Re: [CAD_CAM_EDM_DRO] making an ali flexible coupler Graham Stabler 2003-11-10 10:55:34 UTC Re: making an ali flexible coupler Don Rogers 2003-11-10 18:34:49 UTC Re: making an ali flexible coupler John Haddy 2003-11-10 18:46:35 UTC RE: [CAD_CAM_EDM_DRO] Re: making an ali flexible coupler John Haddy 2003-11-10 18:53:45 UTC RE: [CAD_CAM_EDM_DRO] Re: making an ali flexible coupler piggy 2003-11-10 21:05:58 UTC Re: [CAD_CAM_EDM_DRO] Re: making an ali flexible coupler Jon Elson 2003-11-10 21:51:51 UTC Re: [CAD_CAM_EDM_DRO] Re: making an ali flexible coupler Miroslav Pejic 2003-11-10 22:51:12 UTC RE: [CAD_CAM_EDM_DRO] Re: making an ali flexible coupler Don Rogers 2003-11-11 11:26:38 UTC Re:making an ali flexible coupler Graham Stabler 2003-11-11 17:11:39 UTC Re: making an ali flexible coupler