[NLRS] Elevation rotators for small stuff

[Dr. Gerald N. Johnson]

The rack with a screw on the end has a nice feature of angle linear with 
the stroke, I don't think the linkage on the back hoe bucket has a 
simple relationship between cylinder stroke and angle, but the two racks 
make for lots of friction sliding between the two plates. Suitable racks 
can be bought with matching gears from Boston Gear, maybe Browning and 
almost retail at McMaster-Carr. www.mcmaster.com.
www.mcmaster.com/#racks/=oec4cx
They also have threaded rod with acme threads that are better for 
translation than V threads or threads for ball bearing nuts which are 
very much better but very much higher priced.

There are MANY workable solutions and some will depend on what is in the 
individual's resource collection (fancy name for "junk box.")

73, Jerry, K0CQ

On 9/6/2013 10:55 PM, kr7o at vhfdx.com wrote:
> I saw this several years ago and always found it an interesting design
> if you have fab abilities.
>
> http://www.pe1btx.nl/tower1/Map2/Foto02.htm
>
>
>
>> On 9/5/2013 9:32 AM, Doug Reed wrote:
>>
>> For azimuth with a linear actuator and one added link it is possible
>> to get more than 180 degrees rotation without bending the linear
>> actuator around the mast. See how this back hoe bucket is curled
>> nearly 270 degrees from its dig down position with just the links at
>> the pivot and the single cylinder along the outside of the stick.
>> static.ddmcdn.com/gif/backhoe-loader-sideview.jpg
>>
>
> 73, Robert KR7O/YB2ARO, DM07ba/OI52ee (ex. N7STU)
> DXCC 6M #1122
> WAZ 6M #112
> VUCC 6M, 2M
>
> www.vhfdx.com (KR7O/YB2ARO pages)
> Looking for old VHF QSL cards and logbooks.
>
>
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