Hemera extruder with Duet 3 Tool Board

Discussion in 'Tool heads & ToolChanger' started by dc42, Feb 22, 2020.

  1. dc42

    dc42 Well-Known Member

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    I've finished assembling it. Here it is:

    Hemera tool with tool board.jpg

    I used Greg's design at https://www.thingiverse.com/thing:4008778 except that I had to reduce the thickness of the feet of the v6 PCF duct to about 5mm to match the thickness of the feet on the dock bracket. I've put the modified STL for that part at https://www.dropbox.com/s/sjv5u6fcokbye55/Hemera_PCF_Duct_V6-thinner-feet.stl?dl=0. I found that all the parts will print without support if you put them the right way up on the build plate.

    The VIN connector is rather close to the dock, but there is just enough room to keep the wires clear of the dock.

    The hardware needed is as Greg says in the Thingiverse page, except that 4 of the screws are replaced by M3x10mm button head or cap head with nylon washers under the heads. The nylon washers should be included with tool boards shipments going forwards.

    The tool doesn't quite fit against the dock because although the Tool Board sits comfortably in the space underneath the dock, the locking tab on the VIN connector protrudes about 0.6mm too far. Here are some possible solutions:

    - Reduce the thickness of the feet of the PCF duct and the dock bracket to 4mm
    - Drill a hole in the acrylic to accommodate the connector tab
    - Move the dock bracket 1mm forward
    - Cut the tab off the VIN connector and use a zip tie to hold the VIN cable in place (this could also keep the cable clear of the dock)
     
    #1 dc42, Feb 22, 2020
    Last edited: Feb 23, 2020
  2. dc42

    dc42 Well-Known Member

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    An important note: the fan outputs on the Tool board are 12V only. So assuming a 24V PSU, you need a Hemera with 24V heater cartridge and 12V fans. This isn't a standard E3D item.

    Here are some possible alternative fans:

    - Heatsink fan: Noctua NF-A4x10 FLX 12V. It's a 3-wire fan, so RRF will report the RPM of it. Only question is whether it's powerful enough.
    - Another possible 3-wire heatsink fan: https://www.amazon.co.uk/NoiseBlock...d_rhf_schuc_s_pd_crcd_1_3/257-6451333-1477964
    - Blower fan: https://www.amazon.co.uk/WINSINN-Turbine-40x10mm-Brushless-Bearings/dp/B07RSV5LTH/ref=sr_1_4
     
    #2 dc42, Feb 22, 2020
    Last edited: Feb 23, 2020
    Nibbels likes this.
  3. dc42

    dc42 Well-Known Member

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