How do cband dish track the arc

[jmc98]

I am in the process or acquiring a cband dish and only have a small area to install it in so I need to know how the dish moves to track the arc as I am use to ku dish and motor i know I need an actuator

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[dougruss]

Not Mine..................

https://www.youtube.com/watch?v=1cN56MDcaAs

https://www.youtube.com/watch?v=hXB0aKk9GjY

 

[jmc98]

Not Mine..................

https://www.youtube.com/watch?v=1cN56MDcaAs

https://www.youtube.com/watch?v=hXB0aKk9GjY

Thank you

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[. Raine]

Not all C dishes use an actuator, my HH mount uses a small motor and gears. As for the actual range of movement, I'd estimate that my 9' moves within a 15' to 20' or so space maybe, tracking from 60W to 127W. I could check tomorrow if you want. How small of a space are you installing in and what size dish are you getting?

 

[jmc98]

Not all C dishes use an actuator, my HH mount uses a small motor and gears. As for the actual range of movement, I'd estimate that my 9' moves within a 15' to 20' or so space maybe, tracking from 60W to 127W. I could check tomorrow if you want. How small of a space are you installing in and what size dish are you getting?

7.5 ft dish and the same area as I have my 1.2m that can go 30W to 139w on a DG 380 but I am only interested in see 72w to 137w on the cband dish

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[. Raine]

Just went out and checked, my 9' dish will move through it's full range of motion within a 12'x12' area.

 

[Titanium]

Am I missing something here?

Prime focus dishes rotate on a central axis or pivot point. Example: A 10' dish takes up a maximum of 10' in any direction that it is pointed. You might want to also estimate the feedhorn distance if it is exceptionally long....

 

[jmc98]

Am I missing something here?

Prime focus dishes rotate on a central axis or pivot point. Example: A 10' dish takes up a maximum of 10' in any direction that it is pointed. You might want to also estimate the feedhorn distance if it is exceptionally long....

was trying to visualize the pivot point as opposed to a ku motor like the DG 380 I have

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[FaT Air]

The axis your motor rotates the Ku dish = the axis the BUD will move about. It's the 'polar axis'.

 

[. Raine]

Am I missing something here?

Prime focus dishes rotate on a central axis or pivot point. Example: A 10' dish takes up a maximum of 10' in any direction that it is pointed. You might want to also estimate the feedhorn distance if it is exceptionally long....

So he would need a 7.5'x7.5' area for the C-band dish he's looking into picking up, right? It sounded to me like he wanted an idea of the area that the C-band dish would need, but I could be wrong, definitely wouldn't be the first time.

 

[jmc98]

So he would need a 7.5'x7.5' area for the C-band dish he's looking into picking up, right? It sounded to me like he wanted an idea of the area that the C-band dish would need, but I could be wrong, definitely wouldn't be the first time.

That too is what I wanted to know also everything in this thread has help my understanding of a prime focus setup

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[mmewrench]

Remember to give yourself enough room to work on the dish. Generally the area needed for rotation is no more than the diameter of the dish, but you will want room to get a ladder in there for access to the feedhorn/lnbf. In my case, My actuator is on the west side of the dish, So I allowed an extra 2' on the west side figuring that I would move the dish as far west as possible (lowest part of the arc), in order to service the feedhorn. The further south you are, the more space you will need because your elevation is higher.

 

[. Raine]

The axis your motor rotates the Ku dish = the axis the BUD will move about. It's the 'polar axis'.

Fat Air, my daughter is sitting here and she wanted me to tell you that she likes your profile pic. Looks a lot like one of our cats!

 

[RT-Cat]

The best part of that is: That is "Puppy"

 

[. Raine]

The best part of that is: That is "Puppy"

Ha! I'll tell her that, she'll get a kick out of that. she likes yours too, RT-Cat.

 

[RT-Cat]

A Raine,
That is a sharp, pooped puddy you have on the red blanket, also.

 

[. Raine]

A Raine,
That is a sharp, pooped puddy you have on the red blanket, also.

That's Izzy.