Motor bracket rotation issue

[Zero]

I have SG2100 motor mounted on a tripod. I have failed miserably in arresting the rotation motor mounting bracket about the mounting pole. I thought it might be due to under tightening. After aligning it to my reference sat, I tightened the U-Bolt (Motor mounting bolt) and motor bracket started yielding. I actually over tightened the bolts! In a week, the motor turns to east by about a degree.
My TS is 122°W and I have LoS form 105°W to 59° W. So O move the motor b/w 97°W to 61°W. I feel since I do not move the motor to true south or to west, weight of dish and motor pulls the whole thing to one side and it does not get compensated. Another reason could be the pole/mast diameter.
Please suggest me what could be done to avoid this rotation and what should be the minimum OD of the pole/mast

 

[gabshere]

as a temp fix you might could add a clamp or two and mount them in a way to brace the motor or shim it up with pvc pipe and remount the motor brackets to the pvc allowing a new mount . these are just ideals i haven't tried them. you can also order a new mounting kit for about $10. the poles i use are 2 3/8inch

 

[Eastcoast]

I have SG2100 motor mounted on a tripod. I have failed miserably in arresting the rotation motor mounting bracket about the mounting pole. I thought it might be due to under tightening. After aligning it to my reference sat, I tightened the U-Bolt (Motor mounting bolt) and motor bracket started yielding. I actually over tightened the bolts! In a week, the motor turns to east by about a degree.
My TS is 122°W and I have LoS form 105°W to 59° W. So O move the motor b/w 97°W to 61°W. I feel since I do not move the motor to true south or to west, weight of dish and motor pulls the whole thing to one side and it does not get compensated. Another reason could be the pole/mast diameter.
Please suggest me what could be done to avoid this rotation and what should be the minimum OD of the pole/mast

I will have to agree that I too have had some problems with my SG2100 moving on the mast, I was thinking that my mast was not large enough as mine is 1.75 in.The othe issue is we get alot of srong winds here.

Dave

 

[dem0nlord]

I will have to agree that I too have had some problems with my SG2100 moving on the mast, I was thinking that my mast was not large enough as mine is 1.75 in.The othe issue is we get alot of srong winds here.

Dave

You have a 1.2M on a 1.75" mast in a strong wind area?

 

[Eastcoast]

Yea I know I have been meaning to change it and hope to before winter.Other than the motor mount moving in a strong wind the heavy guage and only 4 foot length is not too bad. (But its still going to be replaced with a 2-3/8 fence post)

Dave

 

[Larry1]

Does the mounting bracket have a separate piece that goes across the back of the pole and then the nut go on the U bolts to hold the motor on the pole? If so, once you have the motor perfectly aligned, drill a small hole through the separate piece and through the mounting pole. Use a metal screw or tap the hole and use a bolt to hold it in place. You will have a very slight adjustment of the motor by tighening the U bolt nuts on one side to twist the motor in that direction... but very little adjustment. Another idea is to fabricate some new U brackets from threaded rod and to use the brackets from a muffler clamp to fit your size of pole. This should alow you to tighten down the brackets sufficently. You may also try placing a layer of the rubber non-slip matting from the dollar store around the pole first to add some more grip to the pole. (or even just a small piece will do, does not need to go all the way around the pole) I have used this with great success using a strip about 1 inch wide. This is the anti-slip matting that is about 50% holes and bumpy.

 

[Zero]

Thanks Larry1. Good idea.. I will try with the grip first as I don't have a hand drill.