¶ Step 1 - Prepare the printed parts
- 25x Heat Insert M3
- 2x Heat Insert M4
- 1x rr_vc4_toolhead_duct
- 2x rr_vc4_toolhead_back_clamp
- 1x rr_vc4_toolhead_front
- 1x rr_vc4_toolhead_toolboard_vertical
- 1x rr_vc4_toolhead_back
- Clean the sacrificial layers on the rr_vc4_toolhead_back_clamp parts, obtaining a clean passthrough hole.
¶ Step 2 - Prepare the Rat Rig toolhead back part
- 1x rr_vc4_toolhead_back
- 8x Heat Insert M3
¶ Step 3 - Prepare the Rat Rig toolhead front part
- 1x rr_vc4_toolhead_front
- 5x Heat Insert M3
- 2x Heat Insert M4
¶ Step 4 - Prepare the Rat Rig toolhead duct part
- 1x rr_vc4_toolhead_duct
- 6x Heat Insert M3
¶ Step 5 - Prepare the Rat Rig toolhead toolboard mount
- 1x rr_vc4_toolhead_toolboard_vertical
- 4x Heat Insert M3
¶ Step 6 - Prepare the Rat Rig toolhead back clamps
- 2x rr_vc4_toolhead_back_clamp
- Remove the sacrificial layer
- 2x Heat Insert M3
¶ Step 7 - Prepare the Rat Rig toolhead plate
- 1x Rat Rig toolhead plate
- 4x M3x6 Countersink Screw with applied thread locker
¶ Step 8 - Mount the toolhead plate
- Rat Rig toolhead plate
- 4x M3x6 Countersink Screw
- Tighten the M3x6 Countersink Screws to secure the plate to the carriage.
- Pay attention to the orientation of the metal plate, having the pointy side towards the front of the printer, chamfered holes up.
- Avoid using a ball end hex key, as they are more prone to damaging the sensitive M3 countersink screw head.
- After tightening the screws, it is essential to verify that the X carriage retains its free movement. Excessive tightening of the screws may lead to the binding of the carriage.
¶ Step 9 - Prepare the back & duct assembly
- 1x rr_vc4_toolhead_back
- 2x rr_vc4_toolhead_back_clamp
- 1x rr_vc4_toolhead_duct
- 1x 4028 Part Cooling Fan
- 2x M3x35 Countersink Screw
- 2x M3x35 Cap Head Screw
- 2x M3x16 Cap Head Screw
- 1x M3x8 Cap Head Screw
¶ Step 10 - Prepare the 4028 Part Cooling Fan
- Remove the four rubber spacers on the 4028 Part Cooling Fan
¶ Step 11 - Attach the duct to the back part
- Rat Rig toolhead back printed part
- Rat Rig toolhead duct printed part
- 2x M3x16 Cap Head Screw
- 1x M3x8 Cap Head Screw
- Insert the M3x16 screws through the back part and tighten them into the duct.
- Feed the M3x8 screw from the opposite side and secure the parts together.
- Take care not to over tighten the screws as you can damage the printed parts.
¶ Step 12 - Assemble the Rat Rig toolhead
- Back part & duct sub-assembly
- 4028 Part Cooling Fan
- Pay special attention to the fan airflow, it should blow the air towards the cooling duct. Most fans have a small arrow indicating the airflow.
- Point the fan wires to this side.
- 2x M3x35 Countersink Screw
- Feed the M3x35 screws into the toolhead plate, through the 4028 part cooling fan and tighten them into the printed sub-assembly.
- Take care not to over tighten the M3x35 screws as you can damage the printed parts
- Avoid using a ball end hex key, as they are more prone to damaging the sensitive M3 countersink screw head.
¶ Step 13 - Prepare the following parts
- 1x rr_vc4_toolhead_front
- 1x rr_vc4_toolhead_fan_grille
- 2x rr_vc4_toolhead_front_clamp
- 2x M4x10 Countersink Screw
- 2x M3x40 Countersink Screw
- 2x M3x35 Cap Head Screw
¶ Step 14 - Assemble the Rat Rig toolhead
- Rat Rig toolhead fan grille printed part
- Rat Rig toolhead front printed part
- 2x M3x35 Cap Head Screw
- Feed the M3x35 cap head screws through the grille (pay close attention to its orientation), the aluminium plate and the 4028 fan, tightening them into the back printed part.
- 2x M3x40 Countersink Screw
- The M3x40 countersink screws must go through the holes on the front assembly and thread into the duct assembly.
- Take care not to over tighten the screws as you can damage the printed parts
- Avoid using a ball end hex key, as they are more prone to damaging the sensitive M3 countersink screw head.
¶ Step 15 - Attach the front belts to Rat Rig toolhead - Part 1
- Insert the belt in the designated slot, and ensure the belt end is fed from behind the screw.
- Pull the belt end and gently place it inside the groove.
- The belt teeth must be facing the front of the machine.
¶ Step 16 - Attach the front belts to Rat Rig toolhead - Part 2
- Rat Rig toolhead front belt clamp
- Lever the belt clamp against the exposed screw section and place it inside the belt slot.
¶ Step 17 - Attach the front belts to Rat Rig toolhead - Part 3
- 1x M4x10 Countersink Screw
- Tighten the M4x10 screw making sure the teeth of the belt clamp mesh with the belt
- Pay attention to seating the notch on the belt clamp on the exposed screw section. Pull on the belt to make sure it's secured properly.
- Repeat Steps 15, 16 and 17 to attach the other belt
¶ Step 18 - Attach the back belts to Rat Rig toolhead - Part 1
- Feed the belt inside the slot on the back part of the toolhead.
- Rat Rig toolhead back belt clamp
- Insert the back belt clamp from the other side of the toolhead, while keeping some excess belt.
¶ Step 19 - Attach the back belts to Rat Rig toolhead - Part 2
- M3x35 Cap Head Screw
- Tighten the M3x35 Cap Head screw while pulling on the belt from the other side.
¶ Step 20 - Attach the back belts to Rat Rig toolhead - Part 3
- Cut the excess belt.
- Repeat Steps 18, 19 and 20 to attach the other belt.
- The Hybrid belts will be installed later.
¶ Step 21 - Prepare the Rapido V2 and PTFE tube
- Phaetus Rapido V2 UHF Hotend
- 4x M2.5x6 Countersink Screw
- PTFE tube - 24.5mm
- Remove the two countersink screws on top of the rapido
- Remove the V6-style adapter, it is not required for the RatRig toolhead
¶ Step 22 - Mount the hot end - Part 1
- Phaetus Rapido V2 UHF
- Place the Phaetus Rapido V2 UHF Hotend on the plate, making sure to route the cables through the designated slot
- Look from above and see if all four holes line up correctly.
- All the holes on the plate, hotend and printed part should line up:
- If they align skip to Step 26
- If they don't align follow the next steps
¶ Step 23 - Phaetus Rapido 2 Hotend - Part 1
- If the cables of your Rapido 2 hotend don't align perfectly with the toolhead slot, please follow the next steps:
- Push down on the silicone sock to remove it
- Loosen the set screw on the heatsink
- Do not remove it completely to avoid losing it
¶ Step 24 - Phaetus Rapido 2 Hotend - Part 2
- Remove the 2.5mm Cap Head Screws from the hotend
- Carefully rotate the heatsink until the three screw holes align again.
- There isn't a way to tell how much you need to rotate you hotend, it might be just 120º or it might be 240º. It's a matter of trial and error.
¶ Step 25 - Phaetus Rapido 2 Hotend - Part 3
- Insert the 2.5mm Cap Head Screws back in and tighten them.
- DO NOT overtighten the screws, they are only 2.5mm and will break if excessive force is applied.
- Tighten the set screw back in
- DO NOT overtighten the screw, if excessive force is applied the heatbreak will be permanently damaged.
- Put the socket back on
- Try to insert the hotend on the toolhead and see if the cables align with the designated slot, if not, repeat Steps 23, 24 and 25 and try a different angle in Step 22
¶ Step 26 - Mount the hot end - Part 2
- 4x M2.5x6 Countersink Screw
- Tighten the M2.5x6 Countersink Screws to secure the hotend to the plate.
- Avoid using a ball end hex key, as they are more prone to damaging the sensitive M2.5 countersink screw head.
- PTFE tube - 24.5mm
- Insert the PTFE tube in to the marked hole and push it until it stops.
¶ Step 27 - Prepare the X axis endstop
- 1x Rat Rig Endstop
- 2x M3x6 Cap Head Screw
¶ Step 28 - Mount the Rat Rig X axis endstop
- Rat Rig X Endstop
- 2x M3x6 Cap Head Screw
- Tighten the M3x6 screws to secure the X endstop to the toolhead.
- Take care not to over tighten the M3x6 screws as you can damage the printed parts.
¶ Step 29 - Prepare the following parts
- 1x rr_vc4_toolhead_shroud
- 40x10mm 24V Axial Fan
- 4x M3x16 Cap Head Screw
- Remove the sacrificial layers from the back of the rr_vc4_toolhead_shroud
¶ Step 30 - Mount the hot end cooling fan
- Rat Rig toolhead fan shroud printed part
- 40x10mm 24V Axial Fan
- The wires should be positioned where the arrow points.
- 4x M3x16 Cap Head Screw
- Insert the M3x16 screws into the Rat Rig toolhead shroud printed part, through the 40mm fan, and fasten them into the Rat Rig toolhead front.
- Take care not to over tighten the M3x16 screws as you can damage the printed parts.
- Pay special attention to the fan airflow, it should blow the air towards the hot end heat sink. Most fans have a small arrow indicating the airflow. If not, the the fan label should be facing the hotend.
¶ Step 31 - Prepare the extruder
- 1x LDO Orbiter V2
- 2x M3x8 Cap Head Screw
¶ Step 32 - Prepare the Orbiter - Part 1
- Remove the tensioning screw
- Remove the two front screws
- Carefully detach (or rotate) the stepper motor from the housing
¶ Step 33 - Prepare the Orbiter - Part 2
- Rotate the stepper motor 180º until the wires come out from the top.
- Carefully reinstall the stepper on the housing.
- Install the front screws
- Install the tensioning screw
¶ Step 34 - Attach the extruder to the toolhead
- LDO Orbiter V2
- 2x M3x8 Cap Head Screw
- Carefully align the extruder with the PTFE tube.
- Insert the M3x8 screws into the LDO Orbiter V2 and fasten them to the Rat Rig toolhead plate.
- Take care not to over tighten the M3x8 screws as you can strip the toolhead plate threads
¶ Step 35 - Prepare the Z probe
- 1x Beacon Rev H Low Profile
- 2x M3x6 Low Head Screw ss304 blk
¶ Step 36 - Mount the Z probe
- Beacon Rev H Low Profile
- Rat Rig recommends connecting the beacon's cable before mounting it to ensure the connector is fully and securely inserted.
- 2x M3x6 Wafer Head Screw
- Tighten the M3x6 screws to secure the Beacon to the toolhead.
- Take care not to over tighten the M3x6 screws as you can damage the PCB and the printed parts.
¶ Step 37 - Prepare the toolboard
- 5x M3x8 Cap Head Screw
- 2x M3x35 Cap Head Screw
- 1x Hex standoff M3x20x4.5
- rr_vc4_toolhead_toolboard_vertical
- BIGTREETECH EBB42 USB/CAN TOOLBOARD V1.2
- TMC2209 driver heatsink (included in the EBB42 box)
- Remove the adhesive backing from the heatsink and gently press it onto the TMC2209 driver.
¶ Step 38 - Mount the toolboard - Part 1
- Thread the hex standoff on to the LDO Orbiter V2 screw.
- Do not overtighten the hex standoffs. They are brass and it is possible to strip the threads.
- Insert the M3x35 screws into the Rat Rig toolhead vertical toolboard mount printed part and secure it onto the toolhead.
- Take care not to over tighten the M3x35 screws as you can damage the printed parts.
- 1x M3x8 Cap Head Screw
- Insert the M3x8 screw through the printed part and into the thread to attach it to hex standoff.
¶ Step 39 - Mount the toolboard - Part 2
- BIGTREETECH EBB42 USB/CAN TOOLBOARD V1.2
- 4x M3x8 Cap Head Screw
- Insert the M3x8 screws into the toolboard and thread them into the Rat Rig toolhead vertical toolboard mount printed part
¶ Step 40 - You are done!
- Your V-Core 4 now has the Rat Rig Toolhead installed and it's ready to melt some filament!
¶ Step 41 - Next guide
- Continue with the next guide: Gantry Alignment