[TowerTalk] TowerTalk DiRe: HDX 555 Motor Drive BEaringgest, Vol 199, Issue 9

[Charles Gallo]

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 at 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