I haven’t figured out the motor control issues yet, but decided to take a break and 3D print some parts for another part of the project. Continue reading Telecine project – part 11 – power and Ethernet
Category Archives: DIY
Telecine project – part 10 – troubleshooting
As I mentioned in part 9, I completed the main circuit board and began testing. I’m having two issues: (1) once it begins turning, the stepper motor won’t stop; and (2) the lamp LED turns on won’t turn off.
Stepper motor
Here is the sequence of steps.
I clicked the Forward button.
The server indicates that it has started the motor running forward, and the motor does indeed start running.
If I click Reverse, the motor reverses and continues running.
When I click Stop, however …
A blank line appears on the server log, and the server becomes non-responsive. The motor continues to run, and the server will not respond to any further commands from the client.
At this point I have to manually shut down the server app.
Lamp LED
The relay is connected to pin #2 on the Raspberry Pi, which is always high, no matter what the server software says. I’m not sure what is going on with this. It’s also possible I have something wired improperly.
Telecine project – part 9 – soldering
Quick update – I’m soldering the various parts of the circuit. My old Weller soldering iron died, so I bought a new one. Continue reading Telecine project – part 9 – soldering
Telecine project – part 8 – circuit design
Since I’m trying to follow the original rpi-film-capture design as closely as possible, I’m adapting the original circuit as documented here. Continue reading Telecine project – part 8 – circuit design
Telecine project – part 7 – first capture!
I redesigned and simplified and camera bracket, then drilled holes in the projector plate and bolted everything together.
One thing I noticed immediately is that the glass between the camera and the film was dirty and scratched. As far as I can tell, I don’t actually need it — it was there to protect the film from the (very bright and hot) lamp and the spinning shutter. So I removed it entirely. Continue reading Telecine project – part 7 – first capture!
Telecine project – part 6 – bracket mark 3
I got a good print of my mark 3 bracket (I skipped mark 2), and the camera bolted on nicely. Part of the lens support snapped off — too thin. The lens support caused other problems as well — it blocks the screwdriver from reaching one of the screw heads; and it also gets in the way of the focus ring on the camera. More on that later. Continue reading Telecine project – part 6 – bracket mark 3
Telecine project – part 5 – first 3D printed parts
My wonderful wife bought me a Monoprice Select 3D Printer V2, so I was able to get a few parts made! The LED holder turned out pretty well (on the third try).
I haven’t been able to try the LED yet, because I still need to figure out the driver/relay circuits. I am also realizing that I will probably need a heat sink on this sucker. Continue reading Telecine project – part 5 – first 3D printed parts
Telecine project – part 4 – GT2 pulleys
After part 3, I got some good advice from Joe Herman (thanks, Joe!). He pointed out two things:
- I really don’t want the old shutter in there at all.
- The smooth belt approach will lead to slippage.
Telecine project – part 3 – shutter and motor
The back of the projector is where the shutter and the main drive shaft are. This is where the motor will be mounted. Continue reading Telecine project – part 3 – shutter and motor
Telecine project – part 2 – camera and light
There are two subsystems on the “front” of the camera — the camera and the light source. Continue reading Telecine project – part 2 – camera and light