Motor off a little from 0 position

[jmc98]

I have a dg380 motor that when it is positioned at 0 it seems to be a little off from where the satellite is I can pull on the dish and it moves the motor shaft and I can lock the satellite that way


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[Lak7]

Is there a Satellite located exactly at Zero from your location?

 

[cyberham]

Judging by your longitude, your 97W heading is just 0.9 degrees east of due south (0 reference). So there may be no problem.

 

[jmc98]

So do I aim the motor at magnetic south or at magnetic azimuth


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[cyberham]

Azimuth is the direction to point your dish in the horizontal plane to receive a particular satellite. Not sure what you mean by magnetic azimuth. When using a compass, its needle always points to magnetic north. So you must apply the appropriate correction for your particular latitude/longitude to read the compass accurately. You aim the motor at the correct azimuth for the satellite you want to receive.

For example, for you, 97W is located at an azimuth of 179.1 degrees. That is 0.9 degrees east of due south (180 degrees azimuth).

 

[jorgek]

The 0 reference mark on your motor must point at true south and not at magnetic south as the compass indicates.
Go to dishpointer.com and it will show you where true south is from your location.

 

[Babadem]

I have a dg380 motor that when it is positioned at 0 it seems to be a little off from where the satellite is I can pull on the dish and it moves the motor shaft and I can lock the satellite that way


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JMC98, take a look at this thread. You maybe able to correct the issue or in my case break it. Just be careful when you make the adjustment.

 

[cyberham]

Nothing he has described so far indicates anything is wrong. He said that the satellite he receives very near his 0 reference can be locked by pulling on his dish. He must be referring to 97W since that's the only one close to his due south. NFF.

 

[jorgek]

Nothing he has described so far indicates anything is wrong. He said that the satellite he receives very near his 0 reference can be locked by pulling on his dish. He must be referring to 97W since that's the only one close to his due south. NFF.

Okay so what am I not understanding here. Having to manually pull on a dish to lock it in place is normal?

 

[jmc98]

Nothing he has described so far indicates anything is wrong. He said that the satellite he receives very near his 0 reference can be locked by pulling on his dish. He must be referring to 97W since that's the only one close to his due south. NFF.

Your LocationSatellite DataDish Setup Data
Latitude: 32.7504°
Longitude: -97.4882°
Name: 97W GALAXY 19 (G-19)
Distance: 36965km
Elevation: 51.9°
Azimuth (true): 179.1°
Azimuth (magn.): 174.9°
LNB Skew [?]: -0.8°

Which azimuth do I use with the compass app on my iphone true or magn


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[cyberham]

I have a dg380 motor that when it is positioned at 0 it seems to be a little off from where the satellite is I can pull on the dish and it moves the motor shaft and I can lock the satellite that way

Okay so what am I not understanding here. Having to manually pull on a dish to lock it in place is normal?

jmc98 says at his 0 reference he must pull the dish a little to lock the signal from 97W. If his dish is installed correctly, when the motor is at 0 reference, it is not precisely aimed at 97W. It is aimed at 97.4882 degrees (his longitude). Pulling the dish is briefly aiming it precisely at 97W and then locking the signal. The point is that to receive 97W, he must motor about 1 degree to the east of his 0 reference.

 

[jorgek]

I'm having too many senior moments especially since my concussion about 3 weeks ago. If its off by 1º
then loosen the motor to mast bolts and move the motor and dish assembly for max Q on 97w.

Are other sats coming in OK? Or is everything off by 1º?

 

[jmc98]

I'm having too many senior moments especially since my concussion about 3 weeks ago. If its off by 1º
then loosen the motor to mast bolts and move the motor and dish assembly for max Q on 97w.

Are other sats coming in OK? Or is everything off by 1º?

Don't know yet about other sats as I only got 97w to scan in once on my prof 7500 tuner card


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[Tron]

Unless there happens to be a satellite at precisely your longitude, you shouldn't be receiving anything when your dish is at '0'.

You shouldn't move the dish/motor assembly to compensate. You can use USALS to move the dish to a calculated satellite position and then tweak.

 

[cyberham]

Tron is precisely correct. Loosening the bolts to move the dish assembly on the mast so 97W is peaked will add about a 1 degree error when tuning all satellites on the arc with the motor. The motor must always be at 0 reference when pointing due south regardless where any satellites are located.

 

[jmc98]

Tron is precisely correct. Loosening the bolts to move the dish assembly on the mast so 97W is peaked will add about a 1 degree error when tuning all satellites on the arc with the motor. The motor must always be at 0 reference when pointing due south regardless where any satellites are located.

So the motor needs to to aim at 180 degrees exactly on my iPhone compass then I send the motor command through USALS to move the motor to 97w and tweak the quality ?



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[cyberham]

Not sure how an Iphone compass works. Otherwise, yes. Once the receiver USALS has moved the motor to 97W, that is when you can loosen the motor/dish assembly on the mast and very slightly move the assembly back and forth in azimuth to tweak received signal quality reading. In theory this is not necessary, but it will compensate for very small errors made along the way in installation.

 

[ftageekyyc]

Do not trust your iPhone compass or any other cell phone compass for accurate aiming, especially if you have not calibrated it before use.

 

[jorgek]

I'm having too many senior moments especially since my concussion about 3 weeks ago. If its off by 1º
then loosen the motor to mast bolts and move the motor and dish assembly for max Q on 97w.

Are other sats coming in OK? Or is everything off by 1º?

When I made the above comment I assumed that jmc98 was already aimed at 97 via USALS but was off by 1º.

 

[jmc98]

When I made the above comment I assumed that jmc98 was already aimed at 97 via USALS but was off by 1º.

Not yet I am still learning the quirks of setting up the prof 7500 USB with a program called progDVB first I need to go back to true south and start over from there


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