Prusa I3 MK2 Pi Mount - Add-on LED Bar

prusaprinters

<p>This is an add-on part for my Raspberry Pi mount for the Prusa i3 MK2:</p> <p><a href="https://www.thingiverse.com/thing:2267652">http://www.thingiverse.com/thing:2267652</a></p> <p>It adds another accessory bar under the mount (the first being the mount for the Pi Camera v2.1) that can be used to mount some high-output LEDs for illuminating the build platform.</p> <p>The setup consists of a bottom and top of the "rod" that holds the LEDs. The top is meant to be printed with clear/transparent PLA or whatever appropriate clear material you have. The bottom, in my case, is printed black to match the printer. A flat panel with three 5mm holes mounts the LEDs with room for the wiring below them.</p> <p>If you are using external power for your LEDs (connecting them to their own power source), you should print the mk-led-holder-bottom.stl version. This has room for wiring the LEDs and running power and ground to them. Any resistors or other controls would be associated with your power supply.</p> <p>Alternately, if you're looking for powering the LEDs with the Pi, and controlling them via the Octoprint Enclosure plugin (so they turn on/off with printing), there's a second version with a small space behind the LEDs sufficient to hold the two resistors and transistor needed to safely power them. It also has a wider opening that will fit the three wires (power/ground/trigger) you need. A circuit diagram is included with the files. That said, the circuit is specific to the LEDs I used, so make sure you understand the resistor sizing and transistor requirements for the ones you use. Its a tight fit, but there's room for everything.</p> <p>As with the camera mount, there are two nuts to secure the rod in place. (Although this one will self-center because the rod itself is wider.)</p> <p>For my specific setup, I'm using three high-output Infrared LEDs from Adafruit (<a href="https://www.adafruit.com/product/387">https://www.adafruit.com/product/387</a>) because I have a No-IR Pi camera, and want to be able to record at night without the extra light. So they look very dim in the color photo above, but are screamin' bright in IR. I experimented with some white LEDs, and I believe that sufficient illumination would be provided by them, as well, for the standard camera.</p> <h3>Print Settings</h3> <p><strong>Printer Brand:</strong></p> <p>Prusa</p> <p><strong>Printer:</strong></p> <p>Prusa Mk2</p> <p><strong>Rafts:</strong></p> <p>Doesn't Matter</p> <p><strong>Supports:</strong></p> <p>Yes</p> <p><strong>Resolution:</strong></p> <p>.15mm</p> <p><strong>Infill:</strong></p> <p>20%</p> <p><strong>Notes:</strong></p> <p>The parts all have varying requirements for printing. You probably want to use a fairly low resolution for the "clear" cover for the LEDs -- it will be more transparent. That said, a higher resolution may give you a diffuser effect, so you may want to experiment.</p> <p>The LED holder bottom can be tricky to print because its at a weird angle. Make sure your slicer generates appropriate supports. I found the default in the Prusa Slic3r was being over-optimistic about how much overhang will work without supports, and had to adjust it to ensure the bottom lip is supported during printing.</p> Category: 3D Printer Accessories