# Apparatus to apply a torque to the moving platform.

This folder contains instructions and the files to print build the structure used to apply torque to the moving platform. The OpenSCAD code used to design the parts is also included. A schematic of the apparatus is provided below

![](TorqueExperiment.png)

First print:
* `block.stl`
![](tilt_block.png)

* `cover.stl`
![](tilt_cover.png)

* tray.stl`
![](tilt_tray.png)


First, insert a mirror in the indent in the `block.stl` and fix the mirror in place using `cover.stl` and four M3 screws. Then, attach `tray.stl` to the top of the main block using four M3 screws. Finally, mount the entire component to the moving platform, the tray piece should be oriented along the _y_ axis of the stage.

The tray has five circular indents, spaced 25 mm apart centre to centre. Masses are placed in these trays to apply different torques. The tilt of the stage in reaction to the applied torques was measured with a home built laser autocollimator.
