Ender 3 Duet Wifi, Bl Touch & PT100

  • Hi Everyone

    After using the Ender 3 (Cartesian) and upgrading to use full E3D hot end/ BL Touch/ Bond-tech extruder in marlin, I decided it was time to join the 32 bit movement and purchased myself a Duet WiFi and PT100 This will be my last upgrade till the E3D tool-changer build becomes available (will use this motion system and tool changers in future)

    As part of the Duet WiFi wiring process I extended my cables to reach inside a IKEA lack case I've built. Wiring went smoothly and also initialising network on the Duet was a smooth and simple procedure.

    Now I've come to the difficult bit, setting up the RepRap Firmware on the Duet, after reading through the marlin setup I had I filled in the config tool and ended up with this final config. https://pastebin.com/6TycU2B4

    Unfortunately I'm having a few issues which I feel has to be down to Firmware / Slicer settings.


    • I can home all which works including the BL Touch probing, However as soon as i print an object the head crashes into the bed before starting the print. RESOLVED

    • The first layer prints but then the following layers are all quite separated its like the z axes moves to much for each layer RESOLVED

    • Cooling Fan not working RESOLVED

    Ender 3 Cura Slicer Start G-code
    M104 S{material_print_temperature_layer_0} ; Set Extruder temperature
    M140 S{material_bed_temperature_layer_0} ; Set Heat Bed temperature
    M190 S{material_bed_temperature_layer_0} ; Wait for Heat Bed temperature
    M109 S{material_print_temperature_layer_0} ; Wait for Extruder temperature
    G28 ; Home all axes
    G92 E0 ; Reset Extruder
    G1 Z5.0 F3000 ; Move Z Axis up little to prevent scratching of Heat Bed

    Any suggestions on what could cause these symptoms?

  • Moderator

    Double check your z axis steps per mm are accurate for the hardware you're using.

  • Moderator

    Also I can't see your Pastebin link. Maybe just copy and paste your config here.

  • Oops sorry I believe I set the paste bin private by accident

  • Moderator

    I don't recognize that formatting.

  • You got me thinking so checked back at the setup, first noob mistake made i posted config.json not config.g will correct above and indeed the z value was incorrect. testing now and will update.

    Update: Yes the Z layers are now looking much improved will allow the print to finish and look to diagnose from there. I've also set the motor currents again and the combination seams to have resolved both issues.

    One issue I can see now I'm going further into the print is the extruder cooling fan isn't working at the moment.

  • administrators

    @3dpnb said in Ender 3 Duet Wifi, Bl Touch & PT100:

    One issue I can see now I'm going further into the print is the extruder cooling fan isn't working at the moment.

    If you mean the heatsink cooling fan, we recommend you connect that to the Fan 1 output, because by default it is thermostatically controlled according to hot end temperature unless you changed it. Or you can connect it to an always-on fan output, but then it will run continuously.

    Either way, make sure you get the + and - wires the right way round.

  • @dc42 I had the heat-sink cooling fan always on and the extruder fan wasn't working due to bad wiring (negative had come loose from connector)

    I've replaced the wiring and connected the extruder fan to fan 0, working great now.

    Thanks for the tip, Ill move the heat sink fan over to fan 1

    also feel free to move this thread if possible I seam to have posted it in the wrong section, meant to post in "Firmware installation"

Log in to reply