German RepRap X350 DD3 Extruderfan

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Here is the rewritten text: DescriptionThe fan for the X350 cools the gear of the DD3 Extruder and ensures a higher reliability when using temperature-sensitive filaments.In addition, the fan holder can be easily released and opened on the left side by means of the lock clip.The DD3 Extruder fan is available in two variants for single and dual extruder operation.ManualTo open the DD3 Extruder fan, press the lock at the right side backwards and turn it to the right, away from you. Then the fan holder can be opened to the left.You now have free access to the extruder without having to disassemble the extruder head. Blocking filament plates can be removed with a tweezers or the gear can be cleaned with a brush.To set the pressure, open the extruder fan and completely release the pressure. Then feed in the filament and start the extruder. Now slowly increase the pressure until the ball bearing turns reliably.AssembleFor a single extruder you need as print:1x Single plate1x Clip1x Holder singleFor a dual extruder you need as print:1x Single plate1x Dual plate1x Clip1x Holder dualI recommend printing the plates lying down so that the holding cylinders for the fan holder and clip are stable enough. The holding cylinders and air guides can be supported with support material.The fan holder should be printed standing on top so that the C-shaped fastening clip has sufficient stability. Through the air guides, the holder can also be printed without support structures. I have supported the ventilation channel for the dual extruder holder with supports.Dual plate replaces the gray Plexiglas cover of the right dual extruder. The narrow plate part is located at the underside. Here, the object fan of the X350 is mounted. Use the original screws of the extruder.The single plate replaces the gray Plexiglas cover of the left single extruder. The narrow plate part is located at the underside. Use the original screws of the dual extruder upgrade.Push the lock clip onto the cylinder on the right side of the mounting plate.To mount the fans, screw in the M3 bolts into the recesses below the drill holes. Then fasten the 40x40mm fan with the M3 screws. The drill holes are dimensioned so that both screws of a length of 16mm and 20mm can be used. At the holder for the dual extruder, the cable of the right fan can be neatly routed in the corresponding groove on top (if necessary, the cable should be turned 180° so that it is securely fastened through the retaining clips).Press the assembled fan holder onto the cylinder on the left side of the mounting plate.For the electrical connection, you need a Molex Micro-Fit 3.0 socket on the X350 side. Make sure to order the socket contacts as well. The order numbers are listed in the material list. On the fan side, I have mounted connectors of the Molex KK series matching the 40x40mm 24V fans used by German RepRap. The cable connects the fans to the free existing 24V connection already routed to the print head.