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This is my first test of my Pinhead 4X5 pinhole camera, a design for 3D printers. (Yes, I printed this myself, at home. The design is available on Thingiverse at: www.thingiverse.com/thing:143882 )
I had a film holder loaded with Ilford Multigrade paper already, so I used that for this test. I put very little effort into framing the shot because I knew it was going to take 15 minutes or more and the sun was setting! So, this is a hastily composed photo, just for the sake of evaluating the "lens" and the camera itself. (Yes, I made the brass shim pinhole myself: approximately f235)
Post-processing was done with Lightroom and the Silver Efex Pro2 plugin.
New 400mm rods, but the stock Z-axis threaded rod is long enough. Custom Replicator case increases build height by 100mm.
Assembled extruder with heatsink and 24 VDC fan, top view.
Be sure to use a 40 x 40mm 24 VDC fan. MBI uses approximately a 5 CFM fan, but you can get much better, quieter fans which move more air (higher CFM). The fan shown is approximately 7 CFM. Note arrows molded into the side of the fan and orient the fan such that it blows towards the heatsink.
The M3 bolts with which the fan and heatsink are affixed are 45mm long.