[TowerTalk] Prosistel PST61 and M2 20M5

[Adrian Rees]

>>Quote: Try putting the RT-21 in 'debug' mode to see if you can move the antenna
with the CW or CCW buttons then. If not, you may have lost the shear pin
inside the rotor that works like a 'mechanical fuse'.

This is very interesting. 

I have a PST71D turning an Optibeam OB16-3 .For the last few months the only way 
I can turn the rotator succesfully, is by using the CW / CCW keys. If I use the little knob to set the direction 
and then wait for the rotator to turn, it usually starts OK, and then stops at no particular point through 
the turn. Carrying on the turn with the CW/CCW keys works OK. 
So I guessed it was to do with cable length / sensor measuring the resistance being out  range of  a pre-set value.
In my case this being due to the distance from the shack to the rotator of around 450 feet, with 5 Core cable (each core 7/22) run out.
 
>From what you mention the Speed & Ramp settings can be altered by the controller and if so, 
would indicate that the user could alter the settings. Therefore I could fix the problem I have.

Is this a Grenn Heron Controller  thing only or can the original PST Controller be altered also ?

By the way are there any other symptoms of this shear pin failing ?  
For instance the antenna moving around, say 10 - 20 degrees in the wind? 

Cheers

Adrian 
MW1LCR / GW9X
________________________________________
From: TowerTalk [towertalk-bounces at contesting.com] on behalf of John Langdon [jlangdon at outer.net]
Sent: 18 October 2012 12:09
To: john at kk9a.com; towertalk at contesting.com
Cc: cx6vm.jorge at gmail.com
Subject: Re: [TowerTalk] Prosistel PST61 and M2 20M5

Is your unit AC or DC motor? What motor voltage? How long is your cable run?
Have you calculated or measured the working voltage across the motor coil?

Try putting the RT-21 in 'debug' mode to see if you can move the antenna
with the CW or CCW buttons then. If not, you may have lost the shear pin
inside the rotor that works like a 'mechanical fuse'.

I now use minimum speed 4, max speed 8, and a 4 second ramp on a PST71.
Previously using a 3/9/1 setup, I lost a pin.

73 John N5CQ

-----Original Message-----
From: TowerTalk [mailto:towertalk-bounces at contesting.com] On Behalf Of
john at kk9a.com
Sent: Wednesday, October 17, 2012 10:22 AM
To: towertalk at contesting.com
Cc: cx6vm.jorge at gmail.com
Subject: Re: [TowerTalk] Prosistel PST61 and M2 20M5

Try increasing the minimum speed and increasing the timeout setting.

John KK9A

To:      <towertalk at contesting.com>
Subject: [TowerTalk] Prosistel PST61 and M2 20M5
From:    "Jorge Diez - CX6VM" <cx6vm.jorge at gmail.com>
Date:    Wed, 17 Oct 2012 12:24:52 -0200

I have a PST61 from Prosistel to move a 20M5 monobander and a XM510 on the
same mast.

When windy, maybe 50 mi/hr, the rotor stop turning. Green Heron RT21 say NO
MOTION and stopped

Is this rotor small for this antennas?

73,

Jorge

CX6VM/CW5W


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