Hi Bob, W7LRD
I am very happy that your problem has been almost solved !
73" de
i8CVS Domenico
----- Original Message -----
From: Bob- W7LRD
To: i8cvs
Sent: Friday, September 24, 2010 8:31 AM
Subject: Re: [amsat-bb] Fw: KR500 bearings
Hello Domenico
Almost done. I am having a problem, when I bolt everything together. When
the rotation gets to the end or stop position. If I do not stop it in time it
will remain jammed at the stop. It can loosen if I hit the case or loosen the
bolts holding the two halves together. I am thinking the stop bolt could be a
bit longer, but it worked before and very little has been changed, except for
cleaning and lubrication. Thanks for your help.
73 Bob W7LRD
----- Original Message -----
From: "i8cvs" <domenico.i8...@tin.it>
To: "AMSAT-BB" <amsat-bb@amsat.org>
Sent: Thursday, September 23, 2010 7:43:20 AM
Subject: [amsat-bb] Fw: KR500 bearings
Hi Bob W7LRD
My previous message to you via w7...@comcast.net was rejected to me !
73" de
i8CVS Domenico
----- Original Message -----
From: i8cvs
To: Bob- W7LRD
Sent: Thursday, September 23, 2010 4:36 PM
Subject: Re: [amsat-bb] KR500 bearings
----- Original Message -----
From: Bob- W7LRD
To: i8cvs
Sent: Thursday, September 23, 2010 1:13 AM
Subject: Re: [amsat-bb] KR500 bearings
Hi Domenico-I am putting everything back together. A couple of questions.
Do you find some grease may ooze out when it gets warm?
Hi Bob W7LRD
You should apply any type of black grease normally used over the outside
gears of crains machine wich widstand high temperature without to melt.
As the retainer ring which has a little lip seems to hold the grease
inside.
It is correct but if you use 2 or 3 more balls then the retainer is non
anymore necessary.
Also I loosened the little gear wheel that drives the pot, in order to work
the gear train.
You must buy a new one gear wheel !
It is a little trickey to get to, is that pot only 180 degrees or can it go
further?
No........... the original pot can rotate for more than 360 degrees
I will have to tighten the gear back to the pot shaft when I can get the
pot in the right location. I don't want to accidently run to rotor and keep
going at the end of the pot.
The original 500 ohm pot can rotate all around for more than 360 degrees
and the center pot wiper of the new model of rotators has a flexible wire
outside the case of the pot to provide a safe contact inside of it !
73 Bob W7LRD
Best 73" de
i8CVS Domenico
----- Original Message -----
From: "i8cvs" <domenico.i8...@tin.it>
To: "Bob- W7LRD" <w7...@comcast.net>, "AMSAT-BB" <amsat-bb@amsat.org>
Sent: Tuesday, September 21, 2010 8:26:11 AM
Subject: Re: [amsat-bb] KR500 bearings
----- Original Message -----
From: "Bob- W7LRD" <w7...@comcast.net>
To: <amsat-bb@amsat.org>
Sent: Tuesday, September 21, 2010 1:54 AM
Subject: [amsat-bb] KR500 bearings
>
>
> Hi-I am looking for a supplier of bearings and the support for them for
the KR500 el rotor. I called Vertex and they're not sure if the bearings are
the same as the current 5400/5500 series. The Kenpro product line is no
longer in production.
>
> 73 Bob W7LRD
>
> Seattle
Hi Bob, W7LRD
The diameter of each ball for the bearing of a KR500 is 0.312" or 5 / 16
inch
or 7.9375 mm. I suggest you to remove both stainless steel bearing holders
throw it away and add 2 or 3 more balls in each bearing in order to replace
the room of the holders teeth. I did it but I do not remember exactly if I
added 2 or 3 more balls. Fill the bearing wrinkles of the rotor housing with
black dense molibdene grease and pull the balls in it.It works very well for
me from many years now.
73" de
i8CVS Domenico
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_______________________________________________
Sent via amsat...@amsat.org. Opinions expressed are those of the author.
Not an AMSAT-NA member? Join now to support the amateur satellite program!
Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
