Toilett processing (Was: ZX-TEAM meeting and Webcam)

From: David Woyciesjes <DAW_at_yalepress3.unipress.yale.edu>
Date: Wed Mar 20 14:00:23 2002

> From: Chris
>
> >- How about a TP holder that measures the weight? Or a spring loaded
> >arm, that contacts a switch when it get near empty. With a wheel at the
> end,
> >you can also have it provide drag on the roll, for spin control. Then it
> >won't be so easy for my cat to run all around the house with it...
>
> You read my mind... I was going to suggest a spring arm pressing against
> the roll. The further the arm travels, the lower the roll. This should
> also take very little adjustment since you are looking for % left.
> Actually, since rolls all share a common spindle diameter... it would be
> easy to have this auto adjust for good thick rolls vs, cheap economy
> paper. You know the end location, so add a sensor to know when the roll
> has been changed. When the "new roll" sensor is tripped, take the current
> reading, that is max size. Now you can calculate the difference from
> there to empty, and relay a % left no matter what the initial thickness
> is. (the only time this would start to be off is on roll "reloads" of
> partially used rolls)....
>
> ....
> Nah... a simple spring arm reading resistance based off roll diameter
> would probably work best.
>
        It doesn't even have to be that complicated. The cardboard tubes are
all the same thickness, give or take a millimeter, so you know where the
stop point is, all the time, every time. Set the switch to trigger the TP=LO
warning about 1/4 or 1/2 inch away from that point.

--- David A Woyciesjes
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Received on Wed Mar 20 2002 - 14:00:23 GMT