Geeetech I3 Pro C Over Top Filament Guides
Description
My "Low Profile Top Mounted Dual Spool Holder" has been working quite well on this machine, however, it suffers some "unspooling" during upward Z motion near the 180mm ceiling, especially with nearly full spools, and specifically whichever spool associated with an idle extruder near the top of its travel. https://www.thingiverse.com/thing:4973791 I couldn't find a filament guide that might address this issue, so I came up with this. I needed for my guides to attach to the top of the printer where the display was originally attached, and for it to feed from a point high enough not to interfere with sharp angles on the X axis when the hotends were near the top of the Z axis. I found a design I liked that used a ball and socket where filament feeds through, however, this design attaches to the top of the display, which no longer sits atop my printer, and is for a single extruder I3 design. I borrowed the ball and socket concept from this model while I designed my guides: https://www.thingiverse.com/thing:1528628 There are two files for my model, left and right. Each of the two files contains two parts, an arm that attaches to the top of the printer on either side where the display was previously attached, and a head that is to be glued to the top of each arm and provides the pass through for filament. My design is intended for the Geeetech i3 Pro C dual extruder printer, however, either left or right could be attached to a single extruder i3 in whichever of 3 positions best compliments spool placement. I decided that having the filament pass through horizontal or vertical was going to present problems with either the spool or the extruders, depending on how full the spool was, and how high the extruders were on the Z, so I instead offset the heads to tilt forward at a 45 degree angle as a compromise. The heads of this model each have two 3mm nubs offset by 22.5 degrees that fit holes in the arms that are offset by 22.5 degrees. These nubs are intended purely for aligning the two parts that are to be glued permanently. The two pieces for either side must be glued together for this model to work. I would have made each side a solid single piece, but while optimizing this model for support-less printing, decided that wasn't going to happen. The two mounting arms slide over the top of the 8mm acrylic frame, and are secured with a M3 x 16 screw and M3 nut.
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