Chief Delphi - Mysterious Screw

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Chief Delphi (http://www.chiefdelphi.com/forums/index.php)

- General Forum (http://www.chiefdelphi.com/forums/forumdisplay.php?f=16)

- - Mysterious Screw (http://www.chiefdelphi.com/forums/showthread.php?t=70005)

hillale

26-02-2010 14:31

Re: Mysterious Screw

1625 has used leadscrews very successfully in the past. In 2006 it was used to actuate the hood on our turreted shooter and in 2008 it was used to bring our shooter from pick-up to shooting position.

MrForbes

27-02-2010 01:10

Re: Mysterious Screw

Quote:

Originally Posted by Al Skierkiewicz (Post 928986)

Large versions of this little screw are used to adjust position on satellite dishes all over the world. I work with one dish that has a lead screw for elevation and it is connected to a 3/4 HP motor with an electric brake. The screw is about 4' long and at least 2" in diameter. Another dish that is much larger has two, one for azimuth and one for elevation. Both can be operated by a hand crank or electric drill attachment. The dish is 6 meters in diameter.

The dishes I worked on way back when used gear drive...10 meters with a pretty heavy equipment room attached to the az drive....

If you ever get the chance to peer into the workings of a 1957-59 Ford Retractable car, you can see several lead screws. An engineering marvel.

Brian C

27-02-2010 03:52

Re: Mysterious Screw

1 Attachment(s)

6 motors too

Al Skierkiewicz

27-02-2010 14:01

Re: Mysterious Screw

Jim,
Our old 10 meter C band dish had manual adjustments for azimuth but luckily was a polar mount. As I remember, the lead screw transmission had another right angle gear reduction box on it. It moved exceedingly slow. We only had to aim once when the main PBS satellite reached end of life and we had to reposition.

MrForbes

27-02-2010 15:07

Re: Mysterious Screw

I guess that X band stuff was more finicky about where you point the antenna...or it was just that some of the birds were about out of gas and moved around a lot..but our tracking systems ran full time

IndySam

27-02-2010 16:08

Re: Mysterious Screw

Quote:

Originally Posted by Taylor (Post 775275)

From what I hear, on team 829 the Head Time-Waster becomes the Lead Button-Maker.

Because after a day of cutting out circles with scissors your hands are so cramped up you cant operate the lead screw anymore.

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