decreased thickness PCB from 1.6 to 0.6 mm
mirror is placed back into the design (see my blog on optical weakness)
increased Bugeja coil size, track length coil increased to 287 mm from 144 mm
changed pinout (adapter board should no longer be needed)
diode voltage over all motor pins can be measured
resistor can be used to scale down motor driver voltage
Track length coil increased with factor 1.993
Radius where poles are placed on increased from 8.25 to 11.25 with factor 1.36. (torque is radius * force)
PCB thickness decreased to 0.6 mm from 1.6, square law implies factor 7.
If it is assumed the board can loose 1.7 Joules via convection**, current is expected to be 0.24 Amperes.
Current decreased by 0.75
Motor should be (1.993*1.36*7*0.75) = 14 times stronger
I have been able to show that the prism can be spun and speed looks sufficient.
Current aims are
- achieve facet overlay with 3D printed encasing
- test rotational stability
I expect to have some results at the end of July.
I measured the board reached a temperature of 60 degrees with 0.32 Amperes at 5 Volt.