[TowerTalk] Ramp up

[Michael Tope]

Hi Dennis, 

I understand that the Orion OR-2800 rotator controller built by M-squared 
can be configured to drive a prop pitch rotator. This controller has programmable
ramp up/down rates, but as Steve suggests I think its setup for motors that
are operating at a nominal level of 28 VDC. Not sure what it would take to
make it work at 90VDC. 

Mike, W4EF..............................................................................................

----- Original Message ----- 
From: "Denis Coolican" <dcoolica@planet.eon.net>
To: <towertalk@contesting.com>
Sent: Tuesday, November 07, 2000 12:07 PM
Subject: [TowerTalk] Ramp up


> I drive a prop pitch rotator with a 90 volt DC motor.
> I was wondering if anyone  had any circuits or devices for controlling a
> DC
> Motor.  I want to control the ramp up and ramp down on a motor driving
> the propitch on the 5 element 20 meter beam.  I want to bring it up to
> full speed in 5 secs and then, when I turn it off, I want it to slow
> down
> in 5 secs.
> 
> That way I do not have have sudden starts and stops.
> 
> I don't want to reinvent the wheel again, unless I have to.
> 
> Anything on this kind of stuff for this homebrewer!
> 
> 
> Denis Ve6AQ / Ve6FI
> 
> 
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