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Re: [TowerTalk] HDX-555 relay settings DELAY RELAYS

To: "Joe Subich, W4TV" <>,
Subject: Re: [TowerTalk] HDX-555 relay settings DELAY RELAYS
From: Bill NY9H <>
Date: Tue, 31 Aug 2010 14:22:19 -0400
List-post: <">>
my manually operated ( switched)  motorized  mdpl72 us tower does not 
have such safeguards....
Sooo  when i built my own remote i did put some 5$ ebay delay relays 
to control the big motor relays... ..

Imagine while the tower is going up , and you flick the switch to 
down.... it keeps going up. RUNNING AWAY as Joe puts it.

The only thing you did was take the appropriate limit switch out of 
the circuit .... OUCH...

bill ny9h/3

At 05:31 PM 8/30/2010, Joe Subich, W4TV wrote:

>  >      I don't know what the factory settings are -  probably a bunch
>  > of delay to keep "amateur" owners out of trouble. Set them  anywhere
>  > you want; I'd suggest a long delay and then turning it down until
>  > you  have a delay you can live with.
>Note, the delay is a safety measure to prevent the tower from
>"running away."  A single phase motor will continue to run in
>the current direction it any time power is applied.  Because of
>this, it is necessary to make sure the motor is completely
>stopped when reversing operation so the capacitor/start winding
>can "kick" it in the correct direction.
>When setting the delay you want to err on the long side ...

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