This proyect allow to create a cheap trackballl mouse starting from a conventional optical Mouse. A Trackball mouse allow people with hand/arm movement problems to control a computer.
It is very important for the function of the trackball mouse that the center of the mouse's laser should touch (or be very near) to the ball.
You will need to download this software (http://hp.vector.co.jp/authors/VA026826/ ) in order to reverse the direction of the mouse.Also it is recommended slow down the mouse speed.
This object was made for the "Mutual de Seguridad C.Ch.C" from Chile. In a project of the Direction of innovation and development, and the Neuro rehabilitation institute.
The resolution for all parts except the ball is 0.3mm. The ball should be very smooth, so it is recommended to print it with 0.1mm resolution and sand it after print.
- Take off the circuit of an optic mouse. 2. Weld wires to each pin of the switch of the right and left button. 3. Weld a flat switch at the end of the wires (One for each button). 4. Put the circuit inside the "Box Mouse", you can fix it with silicone or melt some PLA like in the picture. 5. Fix the "Box Mouse" to the "Box Big". 6. Fix the "Switch Base" on the "Box Big" and fix the flat switch to them. 7. Put over the flat switch the printed Switch, and fix the "Ball Base" where is indicated in the picture. 8. Place the Ball over. 9 Fix the "Box Top". 10. Optionally you can stick something anti-slip at the bottom