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Channel Master/Laminas 1.8m project

Discussion in 'DISH SETUP: Single sat, Multi-Sat & Motorised' started by Captain Jack, May 15, 2015.

  1. Channel Hopper

    Channel Hopper Suffering fools just so you don't have to Staff Member

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    Very lucky you thought of adding the chain .
     
  2. John

    John Enthusiast.

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    >>-What make actuator was it?
    An 8" Venture (there's a pattern developing here).. Will put a 12" one on.-<<
    Have to agree CJ, size really matters
     
  3. scopus

    scopus Specialist Contributor

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    A weather warning out for here tomorrow night into Wednesday, gale force winds expected...
    gusts of 75mph.
     
  4. st1

    st1 SMC-dish aficionado

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    Well... to me it looks a bit like it's really a matter of putting a beefier hoop at the end of the actuator arm... looks like is can be removed and substituted with something else stronger??
    I mean, if the actuator works fine, then why not repair the mechanical failure?
    One could wonder, though, if some suitable counterweights might ease the load on the actuator?
    Of course, against a really strong gust of wind this won't make a difference, but perhaps it might ease the strain...
     
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  5. Channel Hopper

    Channel Hopper Suffering fools just so you don't have to Staff Member

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    The old hoop can most likely be unscrewed from the rest, but a small actuator is not going to last on a vertical set CM dish. CJ might get some reprieve by inverting the dish, offsetting redesign and a bit of counterweight mass, but it will probably not impress the neighbours.
     
  6. scopus

    scopus Specialist Contributor

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    When I got my heavy duty Venture, the heavy duty Superjack, which the Venture replaced now does the inclination and declination on my 1.8 CM.
     
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  7. John

    John Enthusiast.

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    did the same on mine as well Chris.
     
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  8. RimaNTSS

    RimaNTSS Super Moderator Staff Member

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    I was thinking about this issue many times but still do not know proper solution. Change of declination for any offset antenna is needed just a couple of degrees that is equal to maybe couple of centimeters of the movement of the actuator arm. But then 18,24, 36' actuators are not necessary do do the job. Would be enough to have 2' actuator but very powerful. Instead of that, it could be possible to use some kind of lever arm moved by lets say 18' actuator where movement of 18' would change elevation of the dish by only couple of degrees. I just not ready to offer sone technical solution to do that but I am sure it is possible. This is just thinking out of the box.
    I hope I am understood in my explaining of the idea.
     
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  9. Trust1

    Trust1 Specialist Contributor

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    And make the lever in that way , the actuator has to push to get the dish backwarts .
     
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  10. st1

    st1 SMC-dish aficionado

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    Very well explained.
    And exactly what I was thinking.... With suitable mechanical balance, very little actual force might be needed to move reflector.
    As for mechanical strength - shouldn't the small actuator be sufficient (if properly made?)
     
  11. RimaNTSS

    RimaNTSS Super Moderator Staff Member

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    Something in those lines: If actuator is connected to the points B and C. Yellow lines represent fixed infrastructure to the mount. Lever arm is red. Of course, position of the points A, B, C, D, E and F should be carefully calculated. The picture is only schematics . Declination.jpg
     
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  12. aceb

    aceb Specialist Contributor

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    First real blow of the autumn forecast for tonight so the 1.8 is locked down and 1.2 swung over to 90°E to lower it's profile against the wind. Radio mast is wound over into the garden and tethered and all garden furniture has been put away for the winter, I hate this time of year :(
     
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  13. scopus

    scopus Specialist Contributor

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    Makes Winter even longer having rubbish weather in September....usually a nice month.
     
  14. Captain Jack

    Captain Jack Модератор Staff Member

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    Welp, last night was the windiest - up to 60mph apparently. Thankfully, nothing else snapped and I am still getting max signal on the usual satellites.

    Will spend this weekend putting the new jack on. Like all the ideas to ease the strain on it but I am far too lazy, so it'll just be a bigger jack...
     
    Last edited: Sep 13, 2017
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  15. s-band

    s-band Specialist Contributor

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  16. Captain Jack

    Captain Jack Модератор Staff Member

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    Today's work reminded me of this... Replacing a lightbulb

    First, the bigger jack wouldn't fit on the original bracket, so had to make that bigger. After a lot of faffing, with the jack finally on, I found that it wasn't counting pulses. A bit of troubleshooting revealed that the reed switch was short circuit... took one from the 8" jack that broke (internals are the same, more or less) and it's finally on.

    2017-09-16 15.11.17.jpg

    Yesterday's snapshot...

    2017-09-15 18.32.27.jpg
     
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