Prusa X carriage, LM8UU with LEDs and fan
by jridley, published
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This X carriage starts with the LM8UU holders I designed to be very simple and adds a fan bracket that tilts and also a pair of 5mm LED holders.
The fan bracket is optional and can go on either side (or both if you want to go nuts on that). The LED size can be varied in the SCAD as well.
The STL file is set up for SAE 6-32 screws but the SCAD can easily be changed for other sized hardware.
(Note that the belt attachment point on the photo of the bottom of the carriage is incorrect, it was from my first print where I screwed up the direction of the belt)
Insert two 5mm LEDs (you probably want white). Solder together the long lead from one to the short lead from the other (putting them in series), then solder a 220 ohm resistor in series with one of the unused leads on one of the LEDs (it doesn't matter which). Solder wires leading to 12 volt power to the remaining lead of the resistor and the lead from the other LED. If the LEDs do not light, reverse + and - on the power. If they still don't light, you probably hooked up one of the LEDs backwards - reverse one of them and try again.
Press the LM8UU bearings in firmly. Insert a small zip tie into each retaining channel, then tighten and snip off the tail.
Install as you would any X carriage. It is designed to have the belt come off the bottom of the pulley and bearing and lay on the top surface with the belt teeth up. On one side, use one of the toothed belt clamps and a pair of screws to fasten the belt. On the other side, use the belt tightener with the channel facing down towards the belt, insert a screw and a nut through the tightener and into the belt ram. Wrap the belt over the ram and over the top of the tightener (engaging the belt teeth on top of the tighener) and top it all off with the smooth cap. Tighten everything up and tension the belt as desired.
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Prusa X carriage, LM8UU with LEDs and fan by jridley is licensed under the Creative Commons - Attribution license.
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