Jump to content

Voron-0 Umbilical PLUS (with integrated ADXL345) v. 1.0.0

   (0 reviews)

14 Screenshots

  • Like 3
  • Voron FTW! 1

About This File


The Voron-0 Umbilical is a well known and very useful addition to your 3D Printer, originally created by GitHub user timmit99 and can be found in the official Voron-Hardware repository here.

In this new 'Plus' version, I have added a permanent ADXL345 Accelerometer to the Toolhead board, to make input shaper tuning (and possibly other interesting use-cases) more accessible to users. The Molex MicroFit connector was changed from a 14-pin to 20-pin version to acommodate the additional wires for the ADXL345.

The Toolhead PCB can be ordered pre-assembled from JLCPCB (using the included CPL and BOM file) so you do not have to solder the delicate electronics yourself, just the connectors (as you need to do with the original V0-Umbilical).

You can find a full README and Photos/CAD/Design data at my github repository: https://github.com/skuep/V0-Umbilical-Plus



Part Quantity Notes LCSC Part Number Link
20 Pin Socket 1 MOLEX 430452012 C485575 https://www.lcsc.com/product-detail/Wire-To-Board-Wire-To-Wire-Connector_MOLEX-430452012_C485575.html
SMD Thermistor 1 100K 0805 Thermistor C143680 https://lcsc.com/product-detail/NTC-Thermistors_Vishay-Intertech-NTCS0805E3104FXT_C143680.html
2 pin JST XH 5 2.5mm pitch C158012 https://lcsc.com/product-detail/Wire-To-Board-Wire-To-Wire-Connector_JST-Sales-America-B2B-XH-A-LF-SN_C158012.html
3 pin JST XH 2 2.5mm pitch C144394 https://lcsc.com/product-detail/Wire-To-Board-Wire-To-Wire-Connector_JST-Sales-America-B3B-XH-A-LF-SN_C144394.html
4 pin JST XH 3 2.5mm pitch C144395 https://lcsc.com/product-detail/Wire-To-Board-Wire-To-Wire-Connector_JST-Sales-America-B4B-XH-A-LF-SN_C144395.html
6 pin JST XH 1 2.5mm pitch C144397 https://www.lcsc.com/product-detail/Wire-To-Board-Wire-To-Wire-Connector_JST-Sales-America_B6B-XH-A-LF-SN_JST-Sales-America-B6B-XH-A-LF-SN_C144397.html
Screw Terminal 1 5.08mm pitch C8465 https://lcsc.com/product-detail/Screw-terminal_Ningbo-Kangnex-Elec-WJ500V-5-08-2P_C8465.html

Optional Parts

Part Quantity Notes LCSC Part Number Link
0805 10uF Capacitor 3 Use if using BARE neopixel IC's. Strips have these already. C17024 https://lcsc.com/product-detail/Multilayer-Ceramic-Capacitors-MLCC-SMD-SMT_Samsung-Electro-Mechanics-CL21A106KPFNNNE_C17024.html

Toolhead PCB BOM

Part Quantity Notes LCSC Part Number Link
20 Pin Socket (Right Angle) 1 Molex 430452000 C485576 https://www.lcsc.com/product-detail/Wire-To-Board-Wire-To-Wire-Connector_MOLEX-430452000_C485576.html
2 pin JST XH 6 B2B-XH C158012 https://lcsc.com/product-detail/Wire-To-Board-Wire-To-Wire-Connector_JST-Sales-America-B2B-XH-A-LF-SN_C158012.html
4 pin JST XH 1 B4B-XH C144395 https://lcsc.com/product-detail/Wire-To-Board-Wire-To-Wire-Connector_JST-Sales-America-B4B-XH-A-LF-SN_C144395.html
LP2985-33DBVR 1 3.3V LDO C95414 https://www.lcsc.com/product-detail/Linear-Voltage-Regulators-LDO_Texas-Instruments-LP2985-33DBVR_C95414.html
ADXL345BCCZ 1 Accelerometer C9667 https://www.lcsc.com/product-detail/Motion-Sensors-Accelerometers_Analog-Devices-ADXL345BCCZ-RL7_C9667.html
10 Ohm Resistor 2 0603 size C22859 https://www.lcsc.com/product-detail/Chip-Resistor-Surface-Mount_UNI-ROYAL-Uniroyal-Elec-0603WAF100JT5E_C22859.html
10 kOhm Resistor 1 0603 size C25804 https://www.lcsc.com/product-detail/Chip-Resistor-Surface-Mount_UNI-ROYAL-Uniroyal-Elec-0603WAF1002T5E_C25804.html
4.7uF Capacitor 2 0603 size C19666 https://www.lcsc.com/product-detail/Multilayer-Ceramic-Capacitors-MLCC-SMD-SMT_Samsung-Electro-Mechanics-CL10A475KO8NNNC_C19666.html
10nF Capacitor 2 0603 size C57112 https://lcsc.com/product-detail/Multilayer-Ceramic-Capacitors-MLCC-SMD-SMT_10nF-103-10-50V_C57112.html/?href=jlc-SMT

Corresponding CPL and BOM files are included in the repository. Using these files you can easily get yourself a ready-made assembled PCB from JLCPCB so you don't have to have the skills to solder the fine-pitch and 0603 packages.

Umbilical cable

The Umbilical cable is a 220-240mm dual ended 20P (2x10) microfit cable. The connectors are wired 1:1 so pin 1 connects to pin 1 and so forth for all 20 pins.

Cable BOM

Part Quantity Notes LCSC Part Number Link
20 Pin Plug 2 Molex 430252000 C485324 https://lcsc.com/product-detail/Connectors-Housings_MOLEX-430252000_C485324.html
Crimps 20 AWG 12 Molex 430300001/430300007 C259786 https://lcsc.com/product-detail/Line-Pressing-Terminals_MOLEX-430300001_C259786.html
Crimps 26 AWG 28 Molex 430300004/430300010 C259765 https://lcsc.com/product-detail/Line-Pressing-Terminals_MOLEX-430300004_C259765.html
20AWG Wire 12 220mm Sections   PTFE/Silicone/Hefulon for motion rated, PVC could work since it isn't constraind to a cable chain
26AWG Wire 28      

MicroFit connectors support two different ranges of conductor thickness using different wire crimp ferrules. I recommend that you realize the stepper motor and heater wires with 20AWG wire (0.5mm²) and the remaining wires in 26AWG wire (0.14mm²) to save on weight and accelerated mass.

Hints and Remarks

Extruder Stepper Direction

The umbilical cable reverses the stepper rotation direction. I.e. you need to invert the DIR pin of the extruder motor in your printer.cfg file.

dir_pin: PB4 # Add ! (or remove ! if already there) before 'PB4'


Mounting the Toolhead PCB

The umbilical toolhead PCB uses heat stake inserts in order to mount it to the motor screws. In some cases (i.e. LDO motors), the extruder motor already has an additional thread, which has to be either removed by drilling the motor holes with a 3mm spiral drill. If you do not want to drill into the motor, you can use M3x10 captive screws, which are unfortunately hard to find. These screws have a narrowed section and a short thread at the tip so they only 'grab' the thread of the heat stake inserts.

Additional chamber thermistor on SKR mini V2.0

If you are using the SKR mini V2.0 board and you want to connect the chamber thermistor, you can use Timmit99's expansion board (https://github.com/VoronDesign/Voron-Hardware/tree/master/SKR-Mini_TFT_Thermistor_Board).

If you want an easier and faster solution, you can move the Z-STOP endswitch pin and connect it the E0-STOP pin using a simple self-made JST 2-pin to 3-pin adapter (See Photos folder) or by removing the crimp pins from the 2-pin JST and insert them into the housing of a 3-pin JST header. Once the Z-STOP pin is freed up, you can use it for your thermistor. This method needs the following printer.cfg changes:

endstop_pin: ^PC15 # Conversion for additional thermistor (use E0-STOP for Z-STOP)

[temperature_sensor chamber]
sensor_type: Generic 3950
sensor_pin: PC2
gcode_id: C
pullup_resistor: 10000


Connecting the ADXL345 to a Raspberry Pi

The ADXL345 circuit on the toolhead PCB includes a R-C filter and a 3.3V low-dropout regulator to deliver a clean power supply. Thus you can use the official drawings shown in the corresponding docs (https://www.klipper3d.org/Measuring_Resonances.html), with one small change. You need to connect VCC to +5V (Pin 2 or Pin 4) instead of 3.3V (Pin 1) on the Raspberry Pi extension header (See Photos folder). Then follow the official docs for setting the resonance measurement up.





User Feedback

  • Create New...