That actually sounds like a design or maintenance flaw.
First, limit switches should have stopped that.
Second, the motor should not be able to produce enough power to break a lift
cable in good condition, it should stall/clutch before anything fails in the
lift chain
Properly maintaining your cable (properly called Wire Rope), and checking your
limit switches should be an annual thing
(And yes, I know it is somewhat controversial, but to me this includes using a
proper wire rope lube on your wire rope annually or more. I know we used to do
it on our hoists all the time)
--
73 de KG2V
Charlie
> On Jul 7, 2019, at 2:29 PM, Ken K6MR <k6mr@outlook.com> wrote:
>
> When I was in the tower business in the early 1970s, we had a customer who
> stood at the base of the tower and accidentally switched it UP when it was
> already up. Broke the main lift cable and down it came. Quite the mess. So
> even if you are standing there you definitely need to pay attention.
>
>
>
> Ken K6MR
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