Re: [ATM] ATM Fluid Drive Rate Regulation Ideas

["Don Clement" <clement.focuser@verizon.net>]

> Flash! the rate of flow from the waterbag depends on the height of water
> PLUS the weight of the telescope it's supporting!  The change in flow rate
> as the water drains is much, much less than if it were just a bag of
water.

Perhaps an arrangement with a differential flow regulator similar to that
found in differential pressure regulators on compressed gas cylinders. Also
some sort of feedback from a linear temperature sensor or mechanical
bimetallic strip could compensate for temperature variations to keep flow
constant.

It seems that similar problems were solved in regulating the length of clock
pendulums. John Harrison invented the gridiron pendulum compensation.
Another compensation method that I saw in a shop the other day is the
mercury compensated pendulum invented by George Graham. A seemingly
unsolvable problem is just opportunity knocking.



Don Clement

Running Springs, California



_______________________________________________
ATM mailing list http://www.atmlist.net/