User:Pranav Rathi/Notebook/OT/2012/01/12/Extend your Opto-mechanical controls with Lego for out of box control

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Introduction

Due to some airborne noise in our lab we had to put our optical tweezers in a plastic enclosed box. This means that either I had to make huge doors or openings in the box to reach the optomechanical controls or control them from outside. And I chose the second one. There are two ways to control them from outside; first by manual- mechanical control and second is by electro-mechanical control. I choose the first one because it was easier and a step stone to electro-control/servo control. Now to mechanical control the optics from outside was not easy because there was no system built on the device itself to tweak the control knob ( I call it knob A) from outside as we can see from slide 2. All I had was two knobs (A knobs). So to control the device from outside I had to build the system around this knob A in a way to extend and transform this knob to the outside of the box. Once this system is in place I can control the knob A with knob B (the one I put). I call the system (structure) Gear Box, because that is what it is. Once the gear box is in place knob A can be controlled with knob B (manual-mechanical) OR servo control (electro-mechanical).

Design and construction

Hardware

  1. ST1XY-S - XY Translator with Micrometer Drives (thorlabs) or any other optomechanical device.
  2. Lego (2x) 40-Tooth Gears
  3. Lego (4X) 24-Tooth Gears
  4. Lego (5x) 8-Tooth Spur Gears
  5. Lego (2X) Worm Gear
  6. Lego Universal Joint
  7. Lego Axles
  8. Lego Bushings and stoppers
  9. 8-32,#8,4-40 and #4 screws and nuts
  10. Gorilla Epoxy
  11. 1/16” thick aluminum plate
  12. Round Dowel of 1/2” and 3/6”
  13. Knobs
  14. and tools like metal cutter, screwdiver, power drill with bits and dremel set.

Design

Construction

Demonstration

The

<html><strong style="display:block;margin:12px 0 4px"><a href="http://www.slideshare.net/pranavrathi/extend-you-opto-mechanical-controls-with-lego-for-out" title="Extend you opto mechanical controls with lego for out">Extend you opto mechanical controls with lego for out</a></strong><object id="__sse11259320" width="600" height="500"><param name="movie" value="http://static.slidesharecdn.com/swf/ssplayer2.swf?doc=extendyouopto-mechanicalcontrolswithlegoforout-120125142952-phpapp02&stripped_title=extend-you-opto-mechanical-controls-with-lego-for-out&userName=pranavrathi" /><param name="allowFullScreen" value="true"/><param name="allowScriptAccess" value="always"/><param name="wmode" value="transparent"/><embed name="__sse11259320" src="http://static.slidesharecdn.com/swf/ssplayer2.swf?doc=extendyouopto-mechanicalcontrolswithlegoforout-120125142952-phpapp02&stripped_title=extend-you-opto-mechanical-controls-with-lego-for-out&userName=pranavrathi" type="application/x-shockwave-flash" allowscriptaccess="always" allowfullscreen="true" wmode="transparent" width="600" height="500"></embed></object><div style="padding:5px 0 12px">View more <a href="http://www.slideshare.net/">presentations</a> from <a href="http://www.slideshare.net/pranavrathi">pranavrathi</a>.</div></div></html>
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