[TheForge] Re: wire brush

[Mike]

> Release pedal, switch goes off first, then brake stops spindle dead.

For liberal values of "stops dead".  If you could stop the spindle
approximately instantly, the acceleration (albeit negative) would be
likely to cause the mass of the wheel to torque the spindle in two,
disintegrate the wheel or the like.  Complete re-engineering from
scratch could deal with that using shear pins, shearing keys, clutch
etc. but then you lose the desired result: stopping the main rotating
mass real quick.

> ...I suppose by the time such a brake does its thing, the damage
> will have already been done.  But perhaps it may help mitigate
> injuries a bit?  Just a thought.  Any opinions?

A friction brake that would stop a tool quickly wouldn't help in
finger-off accidents but might be a real win in getting-sucked-in
types, especially where the rotating mass was large.  Lose shirt
instead of big meat chunk, lose hair and part of an ear instead of
whole scalp and so on.

- Mike

-- 
Michael Spencer                  Nova Scotia, Canada       .~. 
                                                           /V\ 
mspencer at tallships.ca                                     /( )\
http://home.tallships.ca/mspencer/                        ^^-^^