Harry Dalek wrote:Hi Gregory
Good looking mirror will do the job for sure .
Just have to get the balance correct on the motor which it needs to be or your raster will sway every 12 lines .
The frame mirror is much easier you can make that yourself even just to see it work till something better comes along .
The mirror looks like it has angled mirror on the top as well ? this is good for the frame mirror if you did get another.
You will have it all going in no time,got the motor going easypeasy
Hi Harry,
The PWM driver I got from ebay for $5 inc shipping and it will spin my mirror to around 14000 RPM the link is
http://www.ebay.com/itm/5V-12V-DC-Brush ... 2054147531?
I made a mistake in earlier posts on the mirror as it is 15 sides and not 12 sides so motor speeds required would be
32 lines 12.5 frames/sec = 1600 RPM
60 lines 20 frames/sec = 4800 RPM
120 lines 25 frames/sec = 12000 RPM
Just made the flange and mounted the mirror to the HDD motor. To the eye the mirror seems to runs true with no wobble or eccentricity and the HDD motor now spins to a maximum of around 14000 RPM with 7.5v DC
Due to the heavy mirror The PWM driver makes several attempts before the motor starts spinning. Unfortunately the PWM driver uses surface mount components and the ICs are not marked, so there is no possibility of changing the start frequency circuit. Still it only cost $5 from ebay so its good for initial tests.
I have also temporarily attached a laser pointer to see the line scan as above