NeoDue Part 1 - Duet Wifi for GRR Neo

thingiverse

Since my Neo has greatly benefited from Thingiverse (special thanks to Kakadu for his E3D upgrade and his table stiffener, and for stueckl for his inductive Z endstop); I wanted to give something back, so here is part one of my "NeoDue" upgrade, where I have replaced the old Printrboard with a Duet Wifi (and a display, but that is part 2). To change the electronics board, you need: - A Duet Wifi board - One of each of the three 3D parts printed out on your Neo - Two M3 x 20 mm (or longer) screws to mount the board holder to the fan outlet - Two M3 nuts to mount the fan again - Five Ø2.9...3 mm x 6mm screws for plastic (for the cover part and the Duet Wifi) Hints for mounting: - Remove the board cooling fan and old Printrboard electronics. - Change the cable paths as shown in the pictures (you will need to make the wires of the Z motor, the Z sensor, and the main power cable about 10 cm longer; the others fit just fine). - Turn the extruder motor as shown in the picture so that the connector faces up. - Assemble the board holder (halter_leiterplatte.stl), faceplate (blende.stl), and cover piece (schutzhaube.stl) using the short screws. - If you like to add some extra safety against oil dripping onto the board whenever you oil your linear bearings, use some tape to cover the gap between the board holder and the cover piece. - Now mount the assembly to the fan outlet hole using the two M3 screws. - Mount the fan onto the protruding screws on the backside of the fan outlet hole and secure with M3 nuts. Be cautious: blowing direction equals towards Z axis, i.e., the opposite direction as before! The ribs on the board holder will direct airflow so that the steppers get the cooling they need. Works fine on my machine so far. - Cut out the left plastic cover of Neo to fit the faceplate. - Now mount the board. - Don't forget to secure the wires again. For setting up the board, please refer to Duet documentation - just a few short remarks: - I run the Duet with 19.5V as the original (I did change however the power supply to a 230W one when I changed the print head, so I cannot guarantee if the original Neo supply will provide the needed power). - The connectors of the steppers and the endstops can be left as they are; but you might want to switch to an NPN endstop if you currently use the inductive endstop from stueckl. - The steppers work fine on my machine if I let them run with 500...600mA.