How Do I Design a 2-Axis Solar Tracker Mechanism?

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Discussion Overview

The discussion revolves around the design and construction of a 2-axis solar tracker mechanism, focusing on the mechanical aspects such as motor arrangements, movement systems, and integration of limit switches. Participants share ideas and seek guidance on how to achieve the desired movements for tracking solar energy effectively.

Discussion Character

  • Exploratory
  • Technical explanation
  • Conceptual clarification
  • Debate/contested
  • Homework-related

Main Points Raised

  • One participant suggests using a turntable for lateral movement, with an elevation mechanism mounted on top, comparing it to a tank turret assembly.
  • Another proposes ball screws as a general method for producing the required motion, referencing x-y tables in machine shops as a similar concept.
  • Some participants express concern about the variability of the sun's path, suggesting that a turntable with an elevation cam could be useful for constant paths.
  • There is a discussion about using lead screws or worm gears for movement, with one participant noting that these could be strong and accurate enough for the application.
  • Participants discuss the possibility of integrating sun-tracking sensors to maintain optimal orientation towards the sun.
  • One participant seeks clarification on the mechanics of a worm gear driving a gear sector and how limit switches can be incorporated into the design.
  • There is a request for sketches to illustrate the drive mechanisms, indicating a need for visual aids to understand the concepts better.
  • Another participant highlights the difference between spur and worm drives, noting the orientation of output shafts.
  • Limit switch options are discussed, with suggestions for various types of switches that could be used in the mechanism.

Areas of Agreement / Disagreement

Participants express a variety of ideas and approaches, with no clear consensus on the best method for constructing the solar tracker. Multiple competing views remain regarding the types of mechanisms and components to use.

Contextual Notes

Some limitations include the lack of mechanical knowledge from the original poster, which may affect the understanding of proposed solutions. Additionally, the discussion does not resolve the specifics of integrating limit switches with different drive mechanisms.

Who May Find This Useful

This discussion may be useful for students or hobbyists interested in solar energy applications, mechanical design, and automation systems, particularly those with limited mechanical engineering background.

  • #31
I'm glad that you're not in a hurry, because W had to work early today. That means that I would have had to carry the damned thing walking to work. She's leaving me again tomorrow morning. We split up at least once a month. (Okay, I'm kidding... she goes to babysit the grandbrats every month or so.) If she can't drive me to work, I'll just take the Mac upstairs and replace her Windows-burning piece of **** with it. I don't know why she won't just let me do that anyhow, since the only thing that she uses it for is to read her e-mail (and I have to open the file for her since she doesn't know how despite repeated lessons). One way or another, I'll get a decent picture to you shortly.
 
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  • #32
I've been thinking of a simpler structure (see attachment) if I decide to use servo motors instead. Any comments ?

The round base would probably be made smaller.
 

Attachments

  • DSC00305.JPG
    DSC00305.JPG
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  • #33
A servo is simply a motor that actuates some sort of mechanism on demand, as opposed to something like a clock or electric drill motor that runs constantly as long as it's powered. Usually, it is incorporated with some sort of mechanical linkage and gear train inside a modular housing. If that's what you're talking about, rather than just having your parts attached to the motor shaft as your drawing indicates, then it'll work just fine. You'll probably have to fiddle with the linkage ratios quite a bit to get the rate of movement that you want, but you'll have to do that regardless of the mechanism.
 
  • #34
Yea, with the servo I can just attach it to the shaft without worrying about the gears, etc.

Any idea how I should attach the servo shaft to the big shaft behind the panel ?
 

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