sg2100 and arc alignment

[drvnguy1973]

I have had my motor for a couple years now and all is running good , but lateley i have noticed if I have a higher Q on 82 w I loose almost all of Q on the other end
129W Q will be too low ,I have tried adjusting up/down elevation since its not the back and forth movement thats wrong its the elev. that seems to be thrown off
at one point the Q on both ends were great , but something has thrown it off ?..I am using a Viewsat Max HD for my usuals .I am thinking something has moved ever so slightly over time ...so as it is i have to adjust elevation for 82 Q as 59 or 60 in order to get 50 or 55% on the 129 . I am running the invacom lnb .. as for the others on the top of arc ..eg 110 and 119 they are both around 90% Q ... any suggestions would be great . thanks and have a great Saturday

[Havana1]

Had a similiar problem, high signal on bv and low on dn. I took the base of the motor mount where it fastened to the pole and slightly shifted one side up. The side that was going to dn I was able to raise. Worked great! In the high 90's from 61.5 to 148.

[Costactc]

Definitely sounds like an elevation problem. Before you actually attempt to play with that try skewing your lnb first.

[drvnguy1973]

Skew the invacom ?..twist back and forth is what you mean , because there isnt much throat on that lnb

[drvnguy1973]

you are saying move the foot of the dish ?. i have mine mounted on a 6 by 6 wooden post , so perhaps remove the base screws and adjust it from there ?

[Costactc]

you are saying move the foot of the dish ?. i have mine mounted on a 6 by 6 wooden post , so perhaps remove the base screws and adjust it from there ?

That would work but try the lnb first, back and forth and in and out.

[drvnguy1973]

That would work but try the lnb first, back and forth and in and out.

ok Costactc , its a nice day here today , i will climb the ladder and adjust it I am just wondering if i should reset the reciever and also reset the motor at Zero position before i move anything .my south most bird is 82 w , I remmember 2 yrs back everything was bang on but somthin must have slipped , one thing i did notice today is the mast post where the 4 bolts connect to motor , is squished ..and not perfectly round anymore , i wonder if this could be the culprit .and how i would go about bringining the mast back to original shape ..not squished .

[drvnguy1973]

Had a similiar problem, high signal on bv and low on dn. I took the base of the motor mount where it fastened to the pole and slightly shifted one side up. The side that was going to dn I was able to raise. Worked great! In the high 90's from 61.5 to 148.

Had a horrible day today attempting to fix this , ended up overtightening motor bolts that attach to mast and now it wont rotate properly ..grrrrr. everytime i lined up 82 w i got 85 + Q .. but as soon as i drove motor to the west 119 and 129 dropped to 15 .I wonder if the deck has shifted some over the past couple years . i checked main post and all is about 1 degree off . I am re thinking , perhaps i should buy a galvanized 1, 5/8 and jam it in the ground and start fresh

[Terryl]

Mounting a dish and motor on a wooden beam is not a good idea, as the wood ages it will move, warp and shrink, and the mounting bolts/lag screws can come loose, it would be better to use a steel post set in concrete, less problems with the base moving with time. JMHO


A piece of 1 1/2" rigid conduit works wonders, if your motor will fit a 2" or larger pipe the use the 2" rigid conduit, that stuff wont bend, and it's galvanized for outdoor use.

[drvnguy1973]

I am back with happy results .. I took everything appart today and re plumbed setup and had to shim the foot of dish to get 100% plumb all the way around .. now i am back up at 80% from 61.5 to 129 W . only birds that seem abit weak were 97w galaxy at about 60% . thanks for your support

[drvnguy1973]

Mounting a dish and motor on a wooden beam is not a good idea, as the wood ages it will move, warp and shrink, and the mounting bolts/lag screws can come loose, it would be better to use a steel post set in concrete, less problems with the base moving with time. JMHO


A piece of 1 1/2" rigid conduit works wonders, if your motor will fit a 2" or larger pipe the use the 2" rigid conduit, that stuff wont bend, and it's galvanized for outdoor use.


I realized this today as i was removing a few foot screws holding the mast in place , one of them was rusted and snapped in half .. I think the pole idea would be the best , just need it high enough to clear the fence and giant trees in the way

[Costactc]

Good to hear you got it back.:thumbsup:

[drvnguy1973]

Good to hear you got it back.:thumbsup:

thanks .. I got 87% Q on 82w through 119w but it drops slightly at 129w to 75Q .. should i be concerned that it should be higher . or just leave it as is .

[Costactc]

It should be slightly higher then 75% but if it aint broke then don't fix it.