Satellite dish motor - electromotor characteristics

[etf]

Hi!
What are technical characteristics of electromotors inside satellite dish motors? Can someone write here some models of these electromotors? Especially I'm interested about motors which carry 120cm steel satellite dishes. I think 120cm steel satellite dish is about 15kg weight. Thanks in advance

 

[Danger]

I suspect that it largely depends upon the manufacturer. There's no reason to think that they're all the same. Have you checked with any of their websites for specifications?

 

[etf]

I didn't see informations I need on manufacturer site. Here is one photo I found on google http://wsidigital.com/SG9120-SG6000%20copy.gif . I was wondering which characteristics electromotor must have since it moves relatively heavy load (about 15kg). I'm not so good in mechanics so I appreciate any help :)

 

[Danger]

I see. I misinterpreted your question to some extent. The choice of motor isn't really all that important compared to the choice of gear train. Generally, you want one with high torque and low speed, but that can be achieved simply through mechanical means regardless of the source motor if necessary. Over all, I'd recommend looking into one made for a good 1/2" drill or a lathe rather than a wall clock or phonograph. :D

 

[nsaspook]

I didn't see informations I need on manufacturer site. Here is one photo I found on google http://wsidigital.com/SG9120-SG6000%20copy.gif . I was wondering which characteristics electromotor must have since it moves relatively heavy load (about 15kg). I'm not so good in mechanics so I appreciate any help :)

http://wsidigital.com/photogallery/IMG_0668.jpg

The motor is driven by the LNB voltage 13.5 volts vertical, 18.5 volts horizontal polarisation. A typical LNB might use 150mA and the motor 300ma when moving. A typical sat receiver coax output can only supply about 0.5A so the motor can't be very powerful. The picture looks like a stepper motor and gear box to a worm-drive for the disk position shaft.

 

[etf]

I want to design motor which would be independent of satellite receiver. It would have it's own power supply and it would be connected with some type of controler which has only two buttons for moving dish on east and west I'm able to design it from electrical point of view but I still don't know precisely which characteristics electromotor should have. Can some of you guys suggest me some model which can move load about 15kg weight?

 

[Danger]

I still don't know precisely which characteristics electromotor should have. Can some of you guys suggest me some model which can move load about 15kg weight?

I already answered that. Look at a drill or lathe or other high-torque device. And as far as I know, the channel selector automatically controls the dish orientation via pre-programming. It's like the "fire-and-forget" type of missile. Switch channels with your remote, and the hardware decides how to get the one that you specify.