[ARC5] [Boatanchors] BC-348 Backlash Suggestions

[Dennis Monticelli]

My humble two cents worth.....

Backlash is when the gears move AFTER you have imparted some energy into
the system by say turning a knob and then stopping.  It implies finite
energy storage and a time constant associated with its release, such as the
energy stored in a spring or grease mass that slowly releases that energy
through the old gummy grease.

Play is simply the slop that results from imperfect tolerances.  No
residual stored energy after you stop turning.  No time constant associated
with the release of that energy.

You can have both play and backlash present.  I don't like either one, but
backlash drives me nuts.

Dennis AE6C


On Sat, Apr 27, 2013 at 8:35 AM, J. Forster <jfor at quikus.com> wrote:

> Actually, I believe 'backlash' is a one-dimensional subset of 'play' that
> applies to gears and linkages.
>
> A shaft can have radial or end play.
>
> IMO, backlash is the correct word-of-art for rotational slop in gear
> trains.
>
> YMPV,
>
> -John
>
> =================
>
>
>
>
> >
> >   73 de Les Smith
> >   vk2bcu at operamail.com
> >
> >
> > To quote Richard Knoppow:   "Most of the so-called anti-backlash
> > arrangements of gears is really to eliminate play."
> > So we really mean anti-play arrangement, not anti-backlash.
> >
> > I like your precise use of language, Richard.
> > We (humans) often fail to use the correct word or term.
> >
> > For example it's more common to see "mHz" (meaning one thousandth of a
> > Hertz - a very low frequency) rather than MHz.
> >
> > Les
> >
> > --
> > http://www.fastmail.fm - The professional email service
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