
- The following tools are required for this guide:
- Allen key / hex wrenches in the following sizes: 1.5, 2mm, & 2.5mm

- There have been three revisions of the V-Core 4 electronics enclosure. It is important to establish which enclosure is on the machine you are upgrading as the instructions will vary slightly:
- Electronics Enclosure v1.0 and v1.1:
- Identifiable by the three fans on the side
- Both of these revisions require the use of the following printed part: vc40_adapter_o2s_usb_50mm (SKU: PP000411)
- Two M5x8 Self-tapping plastic screws are required to secure this mount. They are not included in the upgrade kit
- Electronics Enclosure v1.2:
- Identifiable by the single fan on the lid
- This revision requires the use of the following printed part: vc41_adapter_rpi_o2s_usb_retrofit (SKU: PP000410)
- If you are upgrading a V-Core 4.0 with either a revision v1.0 or v1.1 electronics enclosure, then please continue following the next steps
- If you are upgrading a V-Core 4.0 with a revision v1.2 electronics enclosure, then please skip to step 9

- 1x Prepared vc40_adapter_o2s_usb_50mm printed part (SKU: PP000411)
- 2x M5x8 Self-Tapping Screws (Not included in the V-Core 4.1 upgrade kit)

- V-Core 4.0 Electronics Enclosure v1.0 or v1.1 - Lower 50mm cooling fan
- Align the vc40_adapter_o2s_usb_50mm printed part with the lower side of the 50mm cooling fan as shown
- 2x M5x8 Self-Tapping Screws
- Fasten the M5x8 Self-Tapping Screws through the printed part and into the 50mm fan to secure the mount in place

- 1x Orbitool O2S USB adapter (Included in the Orbitool O2S box)
- The Orbitool O2S is SKU: HW4308EC
- 1x M3x8 Cap Head Screw (SKU: HW1502SC)
- If you are upgrading an IDEX variant of the V-Core 4.0, you need two Orbitool O2S USB adapters and two M3x8 Cap Head Screws instead of one of each

- Electronics enclosure assembly - Orbitool USB mount
- 1x Orbitool O2S USB daughterboard
- Align the Orbitool O2S USB daughterboard with the printed mount as shown
- 1x M3x8 Cap Head Screw
- Tighten the M3x8 Cap Head Screws to secure the Orbitool O2S USB daughterboard to the printed mount
- Be careful not to overtighten the screw as you can damage the Orbitool O2S USB daughterboard or the printed part
- If you are upgrading an IDEX variant of the V-Core 4.0, install a second Orbitool O2S USB daughterboard in the free position next to the first one
- Once this step is complete, please skip to step 14

- 1x Prepared vc41_adapter_rpi_o2s_usb_retrofit printed part (SKU: PP000410)

- 1x Raspberry Pi model 4B
- 4x M2.5x6 Cap Head Screw
- Loosen and remove all four M2.5x6 Cap Head Screws
- There is no need to disconnect the Raspberry Pi, it can simply be moved aside until the retrofit mount is installed
- If you are upgrading an IDEX V-Core 4.0, you will have the Waveshare USB Hat installed and the M2.5 Cap Head Screws will be 25mm long instead of 6mm long. Simply move the Raspberry Pi and Waveshare Hat assembly aside temporarily

- 1x Prepared vc41_adapter_rpi_o2s_usb_retrofit printed part
- Install the retrofit mount over the right-hand Raspberry Pi mount as shown
- Make sure the mount is pressed fully against the Electronics Enclosure

- 1x Raspberry Pi model 4B
- Align the Raspberry Pi with the printed mount as shown
- 4x M2.5x6 Cap Head Screw
- Tighten all four M2.5x6 Cap Head Screws to secure the Raspberry Pi to the printed mount
- Be careful not to overtighten the screws as you can damage the Raspberry Pi or the printed parts
- If you are upgrading an IDEX V-Core 4.0, you will have the Waveshare USB Hat installed and the M2.5 Cap Head Screws will be 25mm long instead of 6mm long. Make sure the spacers within the Raspberry Pi and Waveshare Hat stack are still in place

- 1x Orbitool O2S USB adapter (Included in the Orbitool O2S box)
- The Orbitool O2S is SKU: HW4308EC
- 1x M3x8 Cap Head Screw (SKU: HW1502SC)
- If you are upgrading an IDEX variant of the V-Core 4.0, you need two Orbitool O2S USB adapters and two M3x8 Cap Head Screws instead of one of each

- Electronics enclosure assembly - Orbitool USB mount
- 1x Orbitool O2S USB daughterboard
- Align the Orbitool O2S USB daughterboard with the printed mount as shown
- 1x M3x8 Cap Head Screw
- Tighten the M3x8 Cap Head Screws to secure the Orbitool O2S USB daughterboard to the printed mount
- Be careful not to overtighten the screw as you can damage the Orbitool O2S USB daughterboard or the printed part
- If you are upgrading an IDEX variant of the V-Core 4.0, install a second Orbitool O2S USB daughterboard in the free position next to the first one

- The following cables are included in the Orbitool O2S box (SKU: HW4308EC)
- 1x Orbitool O2S USB adapter power cable
- 1x USB-A to USB-C cable
- If you are upgrading an IDEX variant of the V-Core 4.0, you need two of each of the above cables

- USB-A to USB-C cable
- Connect the USB-C end of the cable to the Orbitool O2S USB adapter
- 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
- If you are upgrading an IDEX variant of the V-Core 4.0, connect both Orbitool O2S USB adapters to the Raspberry Pi, and route both USB-A to USB-C cables as shown

- 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

- Orbitool O2S USB adapter power cable
- 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
- Route the Orbitool O2S USB adapter power cable as shown
- Connect the other end of the Orbitool O2S USB adapter power cable to the two terminal connector on the Orbitool O2S USB adapter as shown
- If you are upgrading an IDEX variant of the V-Core 4.0, connect both Orbitool O2S USB adapters to the power supply, and route both Orbitool O2S USB adapter power cables as shown

- The following cable is included in the Orbitool O2S box (SKU: HW4308EC)
- 1x Orbitool O2S toolhead cable
- If you are upgrading an IDEX variant of the V-Core 4.0, you need two of these cables

- Orbitool O2S toolhead cable
- Pass the 6-pin connector of the Orbitool O2S toolhead cable through the hole at the back of the V-Core 4.1, and into the electronics enclosure
- Route the Orbitool O2S toolhead cable as shown
- Connect the Orbitool O2S toolhead cable to the six terminal connector on the Orbitool O2S USB adapter as shown
- If you are upgrading an IDEX variant of the V-Core 4.0, connect the left toolhead to the left Orbitool O2S adapter, and the right toolhead to the right Orbitool O2S adapter

- V-Core 4.1 toolhead
- If you are upgrading an IDEX variant of the V-Core 4.0, this is the left toolhead when viewed from the front
- Orbitool O2S toolhead cable
- Connect the black connector on the Orbitool O2S toolhead cable to the large black connector on the Orbitool O2S toolboard as shown
- Make sure the Orbitool O2S toolhead cable is fully inserted
- The toolhead cable relief has been hidden in the image to show the connector on the Orbitool O2S toolboard
- Do not use excessive force when installing the toolhead cable as you could damage the toolboard
- If you are upgrading an IDEX variant of the V-Core 4.0, repeat both the previous step and this step to wire the right toolhead before proceeding

- 1 metre of Cable Sleeve - Black 10mm split braided sleeve (SKU: HW2088EC)
- If you are upgrading an IDEX variant of the V-Core 4.0, you need two lengths of cable sleeve

- V-Core 4.1 toolhead
- If you are upgrading an IDEX variant of the V-Core 4.0, this is the left toolhead when viewed from the front
- Piano wire end from the umbilical frame mount
- If you are upgrading an IDEX variant of the V-Core 4.0, this is the left of the two piano wire lengths when viewed from the front
- Insert the loose end of the piano wire into the notch on the printed part
- The piano wire may require a little force to insert, but make sure it does not leave the bottom of the printed part
- Fully tighten both marked M3 Cap Head Screws to secure both the Orbitool O2S toolhead cable, and the piano wire, to the toolhead
- If you are upgrading an IDEX variant of the V-Core 4.0, repeat the above steps to install the piano wire on the right toolhead

- 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
- If you are upgrading an IDEX variant of the V-Core 4.0, move one toolhead to the front left and the other to the front right
- Wrap the cable sleeve around the toolhead cable and the piano wire, starting at the toolhead end and leading all the way back to the electronics enclosure
- You may wish to add some cable ties to the wire wrap where the piano wire is, to add additional support
- If you are upgrading an IDEX variant of the V-Core 4.0, repeat the above steps to wrap the toolhead cable for the right toolhead

- V-Core 4.1 umbilical guide
- Secure the toolhead umbilical to the umbilical guide with cable ties
- If you are upgrading an IDEX variant of the V-Core 4.0, secure both of the umbilicals to the mount
- Move the toolhead(s) back to the middle of the print area

- 1x Rat Rig V-Core 4.0 - Electronics AC Cover v1.0 (Set aside during disassembly)
- 9x M3x6 Button Head Screw (Set aside during disassembly)
- 1x Electronics Enclosure Lid Assembly (Set aside during disassembly)

- 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 M3x6 Button Head Screw
- 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

- If you are upgrading a V-Core 4.0 with either a revision v1.0 or v1.1 electronics enclosure, then please skip this step
- Electronics Enclosure Lid Assembly
- 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 M3x6 Button Head Screw
- 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