Master By Project: Component Testing

Posted on Posted in MA Creative Media Arts

Working on the technical aspect of the project some refinements have been made to the electronics used in rotating the mirror. Some issues which were being experienced with jitter in the motors, power control and rotation precision. These issues are seen in the video below. When held in a stationary position the motor begins to jitter the image that was being projected.

In the first instance, a change of the servo motors which drive the rotation was attempted. I thought by upgrading these to a higher quality product with more precision could help remove this problem. Subsequently, this was not the issue in question however the improvements did aid the precision the and accuracy of the system.

Next, some investigation into the electronic systems suggested some additional components were needed to improve its efficiency. Capacitors were added to store a small amount of voltage for the motors prior to them moving. Resistors were added to control voltage coming from the Arduino board which was proving spiky and hindering the rotation of the servo. after a small amount of testing, it was found a 150 OAM resistor provided the best resistance for the circut. Also, a switch was added for power safety within the system in case it needs to be powered down. These additions have greatly improved the movement of the mirror system making the movement far smother and stead when held in a single position

 

Revision – 3/8/17

After further testing, some additional changes have been made to the circuit. As seen in the photo above there were some overlapping wires due to the complex nature of the electronics. The data cables from the Arduino running through the centre of the image in green and yellow was the main issue. It was realised by uncrossing them drastically reduced interfering signals between the motors. Also reworking some of the power input cables helped reduce some of the voltage spikes in the motors.