At 21:00 28/11/2012, you wrote:
Got some unexpected time today to look at the rotor. First I set the
output at pin 6 of the external control output jack to 5.0 V. Then I
got readings every 45 deg from 180 at the left to 180 on the right.
The readings are of course subject to parallax in reading
Original Message -
From: "John Wright"
To:
Sent: Thursday, November 29, 2012 5:40 PM
Subject: [amsat-bb] Re: G5400B Rotor Problem
> At 21:00 28/11/2012, you wrote:
> >Got some unexpected time today to look at the rotor. First I set the
> >output at pin 6 of the external control output j
Hi Erich et al.,
Following suggestion I did the following. Since the rotor goes beyond 180 on
the right side of its travel I let it go until it stopped. I then visually
noted how much beyond 180 it had gone, divided by 2 and brought the dial back
to 360 plus the number just obtained. I then ass
Al,
To eliminate the position pot from the circuit substitute it with
two fixed resistors, ie. 220 Ohm 1/4 Watt. By connecting terminal 2 to 1,
2 to 3 and 2 to the middle point of the to resistors you my simulate -180°
360°
and +180°. You my also use more resistors, for more positions.
Then adjust
Hi, HB9OMQ
For a accurate measuremente both resistors of 220 ohm must be
1% tolerance so that I would prefere to use a linear 500 ohm
wire wound potentiometer measuring exactly the same about 250
ohm resistance between the cursor and each estremity and than
perform the measurement that you suggest
fyi:
http://science.slashdot.org/story/12/11/29/0459232/nasa-cancels-nanosat-challenge
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