13. Wiring

The following tools are required for this guide:

Allen key / hex wrenches in the following sizes: 2mm

Cross slot / Phillips and Flat Head screwdrivers

The following tools are recommended for this guide:

Masking / painters tape

4x Prepared 24V DC Positive wire from the Preparations guide

4x Prepared 24V DC Negative wire from the Preparations guide

1x Prepared 24V DC Positive wire

Insert the fork terminal on one end of the wire into the rightmost of the three terminals marked by the [ +V ] symbol on the power supply. Secure the fork terminal by tightening the screw

Insert the fork terminal on the other end of the wire into the second terminal from the left on the Octopus motherboard. Secure the fork terminal by tightening the screw

1x Prepared 24V DC Negative wire

Insert the fork terminal on one end of the wire into the rightmost of the three terminals marked by the [ -V ] symbol on the power supply. Secure the fork terminal by tightening the screw

Insert the fork terminal on the other end of the wire into the first terminal from the left on the Octopus motherboard. Secure the fork terminal by tightening the screw

After tightening the screws at each end, gently pull the wire to make sure it is firmly connected. If the fork terminal is loose, or comes out of the terminal, reinsert it and tighten the screw again

Route both wires as shown

1x Prepared 24V DC Positive wire

Insert the fork terminal on one end of the wire into the middle of the three terminals marked by the [ +V ] symbol on the power supply. Secure the fork terminal by tightening the screw

Insert the fork terminal on the other end of the wire into the forth terminal from the left on the Octopus motherboard. Secure the fork terminal by tightening the screw

1x Prepared 24V DC Negative wire

Insert the fork terminal on one end of the wire into the middle of the three terminals marked by the [ -V ] symbol on the power supply. Secure the fork terminal by tightening the screw

Insert the fork terminal on the other end of the wire into the third terminal from the left on the Octopus motherboard. Secure the fork terminal by tightening the screw

After tightening the screws at each end, gently pull the wire to make sure it is firmly connected. If the fork terminal is loose, or comes out of the terminal, reinsert it and tighten the screw again

Route both wires as shown

1x Prepared 24V DC Positive wire

Insert the fork terminal on one end of the wire into the leftmost of the three terminals marked by the [ +V ] symbol on the power supply. Secure the fork terminal by tightening the screw

Insert the fork terminal on the other end of the wire into the sixth terminal from the left on the Octopus motherboard. Secure the fork terminal by tightening the screw

1x Prepared 24V DC Negative wire

Insert the fork terminal on one end of the wire into the leftmost of the three terminals marked by the [ -V ] symbol on the power supply. Secure the fork terminal by tightening the screw

Insert the fork terminal on the other end of the wire into the fifth terminal from the left on the Octopus motherboard. Secure the fork terminal by tightening the screw

After tightening the screws at each end, gently pull the wire to make sure it is firmly connected. If the fork terminal is loose, or comes out of the terminal, reinsert it and tighten the screw again

Route both wires as shown

1x Prepared 24V DC Positive wire

Insert the fork terminal on one end of the wire into the top terminal on the Solid State Relay. Secure the fork terminal by tightening the screw

Insert the fork terminal on the other end of the wire into the seventh terminal from the left on the Octopus motherboard. Secure the fork terminal by tightening the screw

1x Prepared 24V DC Negative wire

Insert the fork terminal on one end of the wire into the bottom terminal on the Solid State Relay. Secure the fork terminal by tightening the screw

Insert the fork terminal on the other end of the wire into the eighth terminal from the left on the Octopus motherboard. Secure the fork terminal by tightening the screw

It is crucial to verify that the Solid State Relay is wired correctly. Incorrect wiring will result in severe damage of the Solid State Relay. Double and triple check all of the connections before proceeding.

After tightening the screws at each end, gently pull the wire to make sure it is firmly connected. If the fork terminal is loose, or comes out of the terminal, reinsert it and tighten the screw again

Before proceeding any further, double check that all of the 24V DC wiring matches the provided image

Incorrect wiring will cause irreparable damage to components

32x vc4_wire_clip (SKU: PP000337)

Due to their small size, the vc4_wire_clips are provided on a printed raft and must be carefully separated before use

1x Example 3030 extrusion

1x vc4_wire_clip

To install a wire clip into the extrusion slot, insert one end and then rotate the clip until it clicks into place

These clips are used to retain wires within the extrusion slot for cable management

In some cases, such as working on the underside of an extrusion, it can be helpful to use masking / painters tape to temporarily hold the wires inside the extrusion slot whilst installing the clips

1x Cable 2000mm - 3 Conductor 24AWG - JST-XH to JST-XH (Endstop pin out) (SKU: HW3030EC)

1x Y-axis endstop assembly

1x Cable 2000mm - 3 Conductor 24AWG - JST-XH to JST-XH (Endstop pin out)

Connect one end of the endstop cable to the Y-axis endstop as shown

Make sure that you are using the correct cable and connect the correct end to the endstop. The wire colours and order should match the image. Incorrect wiring can damage the endstop module and Octopus motherboard

Route the cable as shown, passing it behind the stepper motor

Secure the cable within the extrusion slot using four of the 3030 wire clips

Do not fit any 3030 wire clips to the rear extrusion yet, they will be installed in a future step

Route the cable as shown

Do not fit any 3030 wire clips to the rear extrusion yet, they will be installed in a future step

Pass the connector through the marked hole

Route the cable as shown

Connect the other end of the endstop cable to the marked socket on the Octopus motherboard

Make sure that you are using the correct cable and connect the correct end to the Octopus motherboard. The wire colours and order should match the image. Incorrect wiring can damage the endstop module and Octopus motherboard

The lengths and SKUs of the Z-axis stepper cables depend on which size of V-Core 4.0 is being assembled:

Rat Rig V-Core 4.0 300 or 400:

2x Cable 1500mm - 4 Conductor 24AWG - JST XH2.54 to JST PH6P (SKU: HW3026EC)

1x Cable 1000mm - 4 Conductor 24AWG - JST XH2.54 to JST PH6P (SKU: HW3025EC)

Rat Rig V-Core 4.0 500:

2x Cable 2000mm - 4 Conductor 24AWG - JST XH2.54 to JST PH6P (SKU: HW3027EC)

1x Cable 1500mm - 4 Conductor 24AWG - JST XH2.54 to JST PH6P (SKU: HW3026EC)

This step shows how to correctly connect a stepper motor cable to the stepper motor

1x Stepper motor cable

The stepper motor cable has a different connector on each end:

1x Stepper motor connector - JST PH6P

1x Motherboard connector - JST XH4P

1x Example NEMA17 stepper motor

Make sure the connector is oriented correctly with the socket on the stepper motor. The key on the connector should align with the gap on the socket

It is recommended to temporarily remove the bed assembly and lay the machine assembly on its front to make installation of the Z-axis stepper cables easier

It may be helpful to label the stepper motor cables to make it easier to keep track of which is which during the following steps

Connect a stepper motor cable to each front stepper motor

1500mm for a Rat Rig V-Core 4.0 300 or 400

2000mm for a Rat Rig V-Core 4.0 500

Connect a stepper motor cable to the rear stepper motor

1000mm for a Rat Rig V-Core 4.0 300 or 400

1500mm for a Rat Rig V-Core 4.0 500

The three Z-axis stepper motors are labelled Z0, Z1 and Z2

Z0 is the front left stepper motor, when looking at the V-Core 4.0 from the front

Z1 is the rear stepper motor

Z2 is the front right stepper motor, when looking at the V-Core 4.0 from the front

Route each stepper motor cable as shown

Pass all three connectors through the grommet in the base panel

Secure the cables within the extrusion slot using fourteen of the 3030 wire clips in the marked locations

Stand the machine assembly back on its feet at this point, there should be no further need to access the underside

Route all three stepper motor cables upwards, inside the extrusion channel as shown

Z0 stepper motor cable

Z1 stepper motor cable

Z2 stepper motor cable

Pass all three connectors through the marked hole in the back panel

Secure the cables within the extrusion slot using four of the 3030 wire clips in the marked locations

Route all three stepper motor cables inside the electronics enclosure, as shown

Z0 stepper motor cable

Z1 stepper motor cable

Z2 stepper motor cable

Connect each stepper motor cable to the Octopus motherboard

Z0 connects to driver 5, which is the third socket from the top

Z1 connects to driver 6, which is the second socket from the top

Z2 connects to driver 7, which is the top socket

It is important to check the three Z-axis stepper motors are connected to the correct drivers on the Octopus motherboard. Failure to do so will cause issues with Z-tilt adjustment

Stepper Z0 is the front left stepper motor, when looking at the V-Core 4.0 from the front

It must be connected to driver 5 on the Octopus motherboard, which is the third socket from the top

Stepper Z1 is the rear stepper motor

It must be connected to driver 6 on the Octopus motherboard, which is the second socket from the top

Stepper Z2 is the front right stepper motor, when looking at the V-Core 4.0 from the front

It must be connected to driver 7 on the Octopus motherboard, which is the top socket

In the CoreXY configuration, there are only two stepper motors, simply labelled left and right

The left CoreXY stepper motor is on the left when looking at the V-Core 4.0 from the front

Route the left stepper motor cable as shown

Pass the connector and excess cable through the marked hole in the back panel

The right CoreXY stepper motor is on the right when looking at the V-Core 4.0 from the front

Route the right stepper motor cable as shown

Pass the connector and excess cable through the marked hole in the back panel

Secure the cables within the extrusion slot using six of the 3030 wire clips in the marked locations. On the left side, secure the Y-axis endstop cable along with the left stepper motor cable

Route both stepper motor cables inside the electronics enclosure, as shown

Left CoreXY stepper motor cable

Right CoreXY stepper motor cable

Connect each stepper motor cable to the Octopus motherboard

The left CoreXY stepper motor cable connects to driver 0, which is the bottom socket

The right CoreXY stepper motor cable connects to driver 1, which is the second socket from the bottom

It is important to check that both CoreXY stepper motors are connected to the correct drivers on the Octopus motherboard. Failure to do so will cause significant issues

The left stepper motor is on the left when looking at the V-Core 4.0 from the front

It must be connected to driver 0 on the Octopus motherboard, which is the bottom socket

The right stepper motor is on the right when looking at the V-Core 4.0 from the front

It must be connected to driver 1 on the Octopus motherboard, which is the second socket from the bottom

The next few steps are specific to the Hybrid and IDEX variants. If you are building the CoreXY variant, please skip to step 31

The Hybrid and IDEX variants of the V-Core 4.0 have four stepper motors:

The left stepper motor is on the bottom left when looking at the V-Core 4.0 from the front

The right stepper motor is on the bottom right when looking at the V-Core 4.0 from the front

The Y1 stepper motor is on the top left when looking at the V-Core 4.0 from the front

The Y2 stepper motor is on the top right when looking at the V-Core 4.0 from the front

It may be helpful to label the stepper motor cables to make it easier to keep track of which is which during the following steps

Route the left stepper motor cable as shown

Pass the connector and excess cable through the marked hole in the back panel

Route the right stepper motor cable as shown

Pass the connector and excess cable through the marked hole in the back panel

Secure the cables within the extrusion slot using six of the 3030 wire clips in the marked locations. On the left side, secure the Y-axis endstop cable along with the left stepper motor cable

Route the Y1 stepper motor cable as shown

Route the Y2 stepper motor cable as shown

Route both stepper motor cables behind the umbilical mount, as shown

Pass both connectors and all excess cable through the marked hole in the back panel

Secure the cables within the extrusion slot using four of the 3030 wire clips in the marked locations

Route the left and right stepper motor cables inside the electronics enclosure, as shown

Left CoreXY stepper motor cable

Right CoreXY stepper motor cable

Connect each stepper motor cable to the Octopus motherboard

The left stepper motor cable connects to driver 0, which is the bottom socket

The right CoreXY stepper motor cable connects to driver 3, which is the forth socket from the top

Route the Y1 and Y2 stepper motor cables inside the electronics enclosure, as shown

Y1 stepper motor cable

Y2 stepper motor cable

Connect each stepper motor cable to the Octopus motherboard

The Y1 stepper motor cable connects to driver 1, which is the second socket from the bottom

The Y2 stepper motor cable connects to driver 3, which is the fifth socket from the top

It is important to check that all four stepper motors are connected to the correct drivers on the Octopus motherboard. Failure to do so will cause significant issues

The left stepper motor is on the bottom left when looking at the V-Core 4.0 from the front

It must be connected to driver 0 on the Octopus motherboard, which is the bottom socket

The right stepper motor is on the bottom right when looking at the V-Core 4.0 from the front

It must be connected to driver 3 on the Octopus motherboard, which is the forth socket from the top

It is important to check that all four stepper motors are connected to the correct drivers on the Octopus motherboard. Failure to do so will cause significant issues

The Y1 stepper motor is on the top left when looking at the V-Core 4.0 from the front

It must be connected to driver 1 on the Octopus motherboard, which is the second socket from the bottom

The Y2 stepper motor is on the top right when looking at the V-Core 4.0 from the front

It must be connected to driver 3 on the Octopus motherboard, which is the fifth socket from the top

1x Prepared LED-to-LED cable from the Preparations guide

1x Prepared LED-to-Octopus cable from the Preparations guide

Rat Rig V-Core 4.0 LED strip assembly - Left side

Prepared LED-to-LED cable

Connect one end of the LED-to-LED cable to the front JST connector on the left LED strip, as shown

Route the LED-to-LED power cable around the inside of the V-Core 4.0 frame, within the extrusion slot, as shown

Rat Rig V-Core 4.0 LED strip assembly - Right side

Connect the other end of the LED-to-LED cable to the front JST connector on the right LED strip, as shown

Rat Rig V-Core 4.0 LED strip assembly - Left side

LED-to-Octopus cable

Connect one end of the LED-to-Octopus cable to the back JST connector on the left LED strip, as shown

Make sure that the black wire is on the left and the red wire is on the right, as shown

Route the LED-to-Octopus power cable around the inside of the V-Core 4.0 frame, within the extrusion slot, as shown

Pass the end of the cable through the hole in the panel and into the electronics enclosure

Use the 3030 cable clips to secure the cable to the extrusions

Route the LED-to-Octopus power cable as shown

Gently separate roughly 15mm of the two conductors by gripping each and pulling them apart as shown

Strip 5mm of the insulation from both conductors on the end of the wire

Locate the marked wire terminal on the Octopus

Loosen the two marked screws

Insert the stripped end of the black wire into the top slot of the connector

Insert the stripped end of the red wire into the bottom slot of the connector

Tighten both screws to secure the wire into the terminal

After tightening the screws, gently pull each wire to make sure they are fully secured in the terminal. Also check that there are no loose strands of wire which might cause a short circuit

If the cable comes out, loosen the screw, reinsert the cable and tighten the screw before trying again

2x Cable - DC Power - 22AWG BLACK - 500mm - (A-Dupont B-Dupont) (SKU: HW3829EC)

2x Cable - DC Power - 22AWG RED - 500mm - (A-Dupont B-Dupont) (SKU: HW3830EC)

1x USB-A to USB-C cable from step 40 of the Electronics guide

Locate the marked 2x5 pin header on the Octopus motherboard

Cable - DC Power - 22AWG BLACK - 500mm - (A-Dupont B-Dupont)

Connect both of the black Raspberry Pi power cables to the Octopus motherboard as shown

One black Raspberry Pi power cable should be connected to the top pin, second from the left and the other to the bottom pin, second from the left

Cable - DC Power - 22AWG RED - 500mm - (A-Dupont B-Dupont)

Connect both of the red Raspberry Pi power cables to the Octopus motherboard as shown

One red Raspberry Pi power cable should be connected to the top leftmost pin and the other to the bottom leftmost pin

Before continuing, verify that all four Raspberry Pi power cables are correctly connected. Failure to do so will cause irreparable damage to components

Route all four Raspberry Pi power wires as shown

Locate the marked GPIO header on the Raspberry Pi or Waveshare USB hat

The power connections for the Raspberry Pi are the same regardless of which variant of V-Core 4.0 you are building. If building the IDEX variant, the connections are made to the GPIO header on the Waveshare USB hat instead of directly to the Raspberry Pi GPIO header

Connect one of the red Raspberry Pi power wires to the rightmost pin on the bottom row of the GPIO header

Connect the second of the red Raspberry Pi power wires to the second pin from the right, on the bottom row of the GPIO header

Connect one of the black Raspberry Pi power wires to the third pin from the right, on the bottom row of the GPIO header

Connect the second of the black Raspberry Pi power wires to the seventh pin from the right, on the bottom row of the GPIO header

Before continuing, verify that all four Raspberry Pi power cables are correctly connected. Failure to do so will cause irreparable damage to components

USB-A to USB-C cable

Connect the USB-C end of the cable to the Octopus motherboard

Route the USB-A to USB-C cable as shown

Connect the USB-A end of the cable to any available port of the Raspberry Pi

Route the Phaetus Rapido hotend wiring to the toolboard as shown, passing behind the endstop

Install a jumper (found in the toolboard box) onto the marked pins to enable accurate hotend temperature readings

Loosen the two marked screws

Insert each of the stripped hotend heater wires (shown in red) into a separate slot of the connector, then tighten the screws to secure the wires into the terminal

Due to the limited space, it may be easier to temporarily remove the toolboard from the toolhead to install the hotend heater wires

After tightening the screws, gently pull each wire to make sure they are fully secured in the terminal. Also check that there are no loose strands of wire which might cause a short circuit

If either wire comes out, loosen the screw, reinsert the wire, and try again after tightening

Connect the JST connector on the thermistor wiring (shown in blue) to the marked connector on the toolboard

Route the hotend fan wiring to the toolboard as shown

Use cable ties to secure the hotend fan cable to the toolhead

Connect the JST connector on the hotend fan wiring, to the marked connector on the toolboard

Before continuing, verify that the black wire from the hotend fan is connected to the upper pin of the connector and that the red wire from the hotend fan is connected to the lower pin. Incorrect wiring will cause irreparable damage to components

Prepared toolhead endstop cable from the Preparations guide

Connect the 3 pin JST connector to the endstop

Route the endstop wiring to the toolboard as shown

Connect the 5 pin JST connector to the marked connector on the toolboard

Prepared 4028 part cooling fan extension cable from the Preparations guide

Connect the 4028 part cooling fan extension cable to the 4028 part cooling fan

The Molex connectors will only fit together one way and will lock together

Route the single white wire on the 4028 part cooling fan extension cable to the toolboard as shown

In the wiring diagram, the white wire is depicted as grey for clarity

Connect the JST connector on the white wire, to the marked connector on the toolboard

Before continuing, verify that the white wire from the 4028 part cooling fan extension is connected to the upper pin of the connector. Incorrect wiring will cause irreparable damage to components

Route the red and black wires on the 4028 part cooling fan extension cable back to the electronics enclosure, passing through the umbilical hole in the back panel

Do not worry about managing the cables from the toolhead yet, they will be managed and wrapped later in the guide

Route the 4028 part cooling fan extension cable as shown

Connect the end of the cable to the marked socket on the Octopus motherboard

Please note: If you are building an IDEX variant of the V-Core 4.0, there will be two 4028 part cooling fan power cables

Install one in each of the marked sockets on the Octopus motherboard. It does not matter which cable goes in which of the marked sockets as they are both always-on 12V power

Prepared Orbiter smart sensor cable from the Preparations guide

The Orbiter smart sensor cable has two different connectors:

The white Molex connector

The black Dupont connector

Connect the white Molex connector to the connector on the Orbiter smart sensor

Some components of the toolhead have been hidden for clarity

Route the Orbiter smart sensor cable as shown

Connect the 4 pin Dupont connector to the marked connector on the toolboard

Please note: The wiring colour shown may not match your Orbiter smart sensor harness. It is very important to use the provided wiring diagram to correctly connect the cable. Do not blindly follow the wire colours

Incorrect wiring will cause irreparable damage to components

Route the Orbiter extruder stepper motor cable as shown

Connect the extruder stepper motor to the toolboard

Excess cable from the extruder stepper motor can be managed with cable ties

Due to the limited number of available PSU terminals, it is required to "double up" some of the connections

Fork terminals

Orient the fork terminals "back to back" as shown

Power supply terminal

Loosen the screw on the power supply terminal and insert the two fork terminals as shown

Fasten the screw on the power supply terminal to secure the fork terminals

After tightening the screws, gently pull fork terminals to make sure they are fully secured to the power supply

If either fork terminal comes out, loosen the screw, reinsert the terminals, and try again after tightening

1x Prepared toolboard power wiring from the Preparations guide

1x Cable - USB-A to USB-C Cable 1500mm (SKU: HW3907EC)

1x Cable - USB-A to Beacon (Included with the Beacon Sensor - SKU: HW3849EC)

Prepared toolboard power wiring from the Preparations guide

Insert the fork terminal on the red wire into any of the three terminals marked by the [ +V ] symbol on the power supply. Secure the fork terminal by tightening the screw

Insert the fork terminal on the black wire into any of the three terminals marked by the [ -V ] symbol on the power supply. Secure the fork terminal by tightening the screw

Refer to step 52 for help on installing two fork terminals into a single power supply terminal

Route the toolboard power wires as shown, passing the white connector through the hole in the electronics enclosure and panel

Connect the USB-A end of USB-A to USB-C cable to any available USB port on the Raspberry Pi and route the cable as shown

Connect the USB-A end of USB-A to Beacon cable to any available USB port on the Raspberry Pi and route the cable as shown

Pass both of the connectors of the USB cables through the hole in the electronics enclosure and panel

V-Core 4 toolhead

If you are building an IDEX variant of the V-Core 4.0, this is the left toolhead when viewed from the front

Connect the white Molex Micro-Fit connector on the toolhead wiring to the EBB42 toolboard as shown

Connect the USB-C end of the USB-A to USB-C cable to the toolboard as shown

Connect the Beacon end of the USB-A to Beacon cable, to the connector on the Beacon probe, then route the cable around the toolhead as shown

Secure the USB-A to Beacon cable to the toolhead using cable ties at the points marked

1 metre of Cable Sleeve - Black 10mm split braided sleeve (SKU: HW2088EC)

It is recommended to perform the next steps with the toolhead moved to the the front left corner, as this ensures all toolhead wiring will be long enough to reach the whole print area

Be careful not to push the toolhead too far against the end of the end of the X-axis gantry as you can damage the X-axis endstop

If you are building an IDEX variant of the V-Core 4.0, put one toolhead in the front left and the other in the front right

Route the toolhead cables along the previously installed piano wire and wrap the cable sleeve around both the cables and the piano wire, leading all the way back to the electronics enclosure

Secure all four toolhead cables (Toolboard USB, Toolboard Power, Beacon and 4028 part cooling fan power) to the umbilical mount on the toolhead, using cable ties

If you are building a CoreXY or Hybrid variant of the V-Core 4.0, secure the umbilical to the frame mount at this stage

If you are building an IDEX variant of the V-Core 4.0, do not fasten the umbilical to the frame until both toolheads have been wired and cable managed. Then secure both of the umbilicals to the mount

Move the toolhead(s) back to the middle of the print area

Please note: If you are building an IDEX variant of the V-Core 4.0, repeat all steps beginning at step 43, to wire the second toolhead. The second IDEX toolhead does not have a Beacon probe, so skip any instructions relating to it

1.2 metre of Cable Sleeve - Black 5mm split braided sleeve (SKU: HW3884EC)

The V-Core 4.0 kit is provided with some smaller cable sleeve that can optionally be used to sleeve the white PTFE tube from the toolhead

If you are building an IDEX, remember to sleeve both PTFE tubes

1x Cable - USB-A to Rat Rig VAOC Camera (SKU: HW4003EC)

1x Cable 1000mm - 3 Conductor 24AWG - JST PH2.0 to Dupont 2.54 (VAOC LED) (SKU: HW4094EC)

1x Cable 1500mm - 3 Conductor 24AWG - JST XH2.54 to JST XH2.54 (Endstop pin out) (SKU: HW3029EC)

1x Fan - 40mm Axial Brushless 24V DC - 1500mm Cable - GDSTime High Quality (Double Ball Bearing) (SKU: HW2815EC)

The necessary VAOC wiring will be performed in the next steps so that it is ready for the assembly and installation of the VAOC module in a later chapter

Connect the USB-A end of the USB-A to Rat Rig VAOC Camera cable to any available USB port on the Raspberry Pi (or USB hub hat) and route the cable as shown

Pass the other end of the cable through the marked hole

Connect one end of the 1500mm - 3 Conductor 24AWG - JST XH2.54 to JST XH2.54 (Endstop pin out) cable to the marked connector on the Octopus motherboard

Route the remainder of the cable as shown

Pass the other end of the cable through the marked hole

Locate the marked 1x3 pin header on the Octopus motherboard

Cable 1000mm - 3 Conductor 24AWG - JST PH2.0 to Dupont 2.54 (VAOC LED)

Connect the Dupont end of the cable to the Octopus motherboard, as shown

Make sure that the Dupont connector is oriented as shown. The red wire should be at the top, white in the middle and black at the bottom

Route the remainder of the cable as shown

Pass the other end of the cable through the marked hole

Fan - 40mm Axial Brushless 24V DC - 1500mm Cable - GDSTime High Quality (Double Ball Bearing)

Sit the fan on the baseplate of the V-Core 4.0 assembly for now

Route the fan wiring as shown

Pass the connector on the fan wiring through the hole in the back panel and into the electronics enclosure

Route the VAOC fan cable as shown

Connect the end of the cable to the marked socket on the Octopus motherboard

Optional: It is recommended, but not required, to assemble the IDEX accessories at this point

Follow the IDEX accessories guide, then return to complete the remaining steps here

21x Electronics Wire Guide Clip - Nylon Injection Part (SKU: HW3847GC)

The electronics wire guide clips hook on to one side of the wire guide printed parts

Then rotate and click into place

Install all 21 electronics wire guide clips to secure all of the wiring in place

If you need to remove one, or all, of the electronics wire guide clips, insert a thin, flat object into the small pocket on the side of the clip, then gently pry that end to unclip it from the wire guide

Be careful not to trap or pinch any cables when installing the wire guide clips

It is necessary, for initial testing and commissioning, to connect the the bed heater thermistor to the Octopus motherboard. Do not install the bed heater, or the magnetic print sheet to the bed at this point, they will be installed during the commissioning guide

Keenovo Silicone Heater Bed Pad w/ NTC 100K Thermistor and Thermal Fuse (Note: The SKU varies based on voltage and size)

110V Variants (300, 400, 500): HW2766EK, HW2767EK, HW2768EK

220V Variants (300, 400, 500): HW2349EC, HW2350EC, HW2351EC

Set the bed heater on the baseplate, inside the V-Core 4.0 assembly

Feed the bed heater thermistor cable through the marked hole in the back panel and into the electronics enclosure, leaving the other 2 wires coming from the bed heater where they are

Route the bed heater thermistor cable as shown. Do not worry about cable managing it at this point

Connect the 2 pin JST connector on the bed heater thermistor, to the marked connector on the Octopus motherboard

Before proceeding with any of the line voltage (110V / 220V AC) wiring, it is crucial to understand the risks involved

Line voltage wiring is dangerous and should always be performed by a competent person. This is a crucial safety measure to prevent electrical hazards and ensure the work is carried out safely and correctly. Line voltage can cause significant injury, or even death if handled improperly

Always make sure the machine is unplugged and that any capacitors (such as inside the power supply) have had time to discharge before performing any maintenance. NEVER work on the machine whilst it is plugged in

Additional warning for counties with 110V line voltage:

Ensure the power cable you are using is certified and rated for a continuous current of 15A or higher. If you are unsure which power cable to use, consult a professional or certified electrician

The V-Core 4.0 line voltage wiring guide is available here

Note: Do not connect the silicone bed heater to the power supply or solid state relay at this point. It will be wired during the commissioning guide

Continue to the next step once the line voltage wiring is complete

1x Rat Rig V-Core 4.0 - Electronics AC Cover v1.0 (SKU: HW3788GC)

9x Button Head Screw M3 (Single) (Length: 6mm) (SKU: HW1337SC)

1x Prepared Electronics Enclosure Lid Assembly from step 59 of the Electronics guide

Rat Rig V-Core 4.0 - Electronics AC Cover v1.0

Position the AC cover over the AC wiring, aligning the holes in the cover with the hex standoffs

Be careful not to trap or pinch any cables when installing the AC cover

5x Button Head Screw M3 (Single) (Length: 6mm)

Insert an M3x6 Button Head Screw into each of the five holes shown on the cover, threading and tightening them into the hex standoffs beneath

Be careful not to overtighten the screws as you can damage the AC cover

Prepared Electronics Enclosure Lid Assembly from step 59 of the Electronics guide

Fan - 120x15 Axial 24V - JST-2 Power Connector

Connect the fan connector to the marked socket on the Octopus motherboard

Align the lid with the electronics enclosure

Make sure the cable for the 120x15mm fan is clear of the fan blades

4x Button Head Screw M3 (Single) (Length: 6mm)

Insert an M3x6 Button Head Screw into each of the four marked holes on the cover, threading and tightening them into the electronics enclosure

Be careful not to overtighten the screws as you can damage the printed parts

The next guide to follow will depend on your specific V-Core 4.0 configuration:

If you are building an IDEX variant of the V-Core 4.0:

Firstly follow the Hybrid + IDEX Y-Axis Belts guide

Then follow the IDEX Accessories guide, (If not already completed in step 63)

Lastly, follow the instructions below depending on whether you are enclosing your IDEX V-Core 4.0 or not

If you are enclosing your V-Core 4.0, continue to the Enclosure guide

If you are not enclosing your V-Core 4.0, continue to the V-Core 4.0 Commissioning guide