E3D on Vertex K8400 (Rev 2)

thingiverse

This is the second revision of my E3D dual print-head mount for Vertex K8400 published here. The old design had several issues: the lower ends of left and right holders were too close to the heat-blocks, which could melt due to printing process imperfections there were several gaps in between things causing ducts to leak air air duct openings were not aligned with the nozzles there was insufficient airflow/cooling towards bearings located under the print-head the wires coming from heaters and thermistors were hanging around X rod, making it hard to fish them into the long channels of the main thing the fan was fixed in a position using a sliding-in piece rather than screws air was hitting heat-blocks not allowing them to reach temperatures above 223 degrees while LEDs looked as a cool feature, they were not very practical due to ever-changing amount of light that hits Raspberry Pi camera. Having stationary LED strips along the edges of the printer is a better option overall appearance/design had issues (at least in my opinion) New design addresses everything from the above list. In addition, it allows to gain few additional millimeters of printing space along X and Y axis (details below). 15 Ohm resistor used in the 1st design now uses 33 Ohm resistor This design allows you to gain about 4 additional millimeters of print space by Y axis and 4 by X axis. However, to get that extra space you will need to shorten the leg of XY linear bearing clamps and also update printer firmware and Repetier settings. I personally decided that the gain does not worth efforts. Assembly Instructions My previous revision of E3D print-head contains very detailed Assembly Instructions most of which still apply. Please read them as here I will mention only whatever is new and/or different. Disassemble original print-head, remove top XY CARRIAGE and install Main thing instead Place M3 nuts into Holder thing and slide it into Main thing. Slide four M3x50mm screws from the bottom up and tighten remaining 2 carriages, main thing and holder together Place hot ends between Holder and Side_holder pieces. Slide the wires into the channels of Main thing. Use M4 x16mm screws to fix hotends in position. Vertical adjustment may be required if you have 2 hotends Place the fan to the top of Main thing and place Fan_mount thing on top of the fan. Fix them in this position with four M3 x 30mm socket cup screws Replace the resistor on printed board with 33 Omh 1W resistor Place the printed board on top of Fan_mount and temporarily fix it in this position with M3 screws Connect all the wires to the printed board. Keep wires short, but don't stretch them. Wrap electrical tape around the fan and the wires (see images) If Top_cover was printed in black or other non-translucent filament, glue the Lens things to the side holes of the Top_cover. Wider side of the Lens should be on outside. One drop of glue applied from inside will be enough Use two M3 x 12mm socket cup screws to attach Wire_holder to Top_cover Place Top_cover over the printed board. Use four M3 x 16mm screws to attached them both to Fan_mount Plug in the cable and use nylon wire tie to attach it to Wire_holder Attach Duct thing and fix it in position with M3 x 12mm screw