03. Rat Rig Toolhead V1.0 BETA 1

Remove the M3x25 Cap Head Screw

Remove the Hex Nut - M3

Remove the M3 Nylon Locking Hex Nut

Remove the M3x35 Cap Head Screw

Remove the 40mm_fan_duct assembly as shown

Remove the four M3x35 Cap Head Screws

Remove the 4028 Part Cooling Fan from the printed part, it will be re-used on the Rat Rig Toolhead V1.0

Remove the four Hex Nuts - M3

Remove the two M3x8 Cap Head Screws

Disconnect the Endstop Module and set it aside, it will be re-used on the Rat Rig Toolhead V1.0

Loosen the M3x8 Cap Head Screw

Remove the Z-probe from the printed part, it will be re-used on the Rat Rig Toolhead V1.0

Remove the three M3x8 Cap Head Screws

Remove the four M3x20 Cap Head Screws

Remove the ratrig_eva3_shroud Printed Part

Remove the 4010 Axial Fan from the assembly, it will be re-used on the Rat Rig Toolhead V1.0

Remove the four M3x8 Cap Head Screws

Remove the four M3x8 Cap Head Screws

Gently push the hotend assembly down and away from the toolhead-

Rotate the hot end assembly into position as shown

Remove the PTFE line

Remove the four M2.5x8 Cap Head Screws

Remove the Rapido hotend from the printed part, it will be re-used on the Rat Rig Toolhead V1.0

Tip: Insert the four M2.5x8 Cap Head Screws back in the Rapido hotend mounting points to avoid losing them.

Remove the two M3x25 screws on the face of the LGX Lite which secure the motor in place

Remove the Bondtech LGX Lite motor from the back of the LGX Lite extruder

Remove the three M3x12 Cap Head Screws

Remove the two M3x8 Cap Head Screws

Remove the extruder assembly

The new Rat Rig toolhead uses the Orbiter V2,

Remove the M3x8 Cap Head Screws holding the LGX Lite to the EVA3 drive_lgx_lite Printed Part

Reassemble the LGX Lite so you can safely store it.

Loosen the M5x40 Cap Head Screw

Pull the belt to help remove the CoreXY belt grabber

Remove the M5 nylon locking nut

Remove the belt grabber from the toolhead

Repeat the previous steps and remove the other CoreXY belt grabber

Remove the two M3x8 Cap Head Screws

Remove the belt front belt holder

Repeat the previous steps for the other front belt holder

Remove the two M3x35 Cap Head Screws

Pull down on the EVA horn ducts

Remove the two M3x35 Cap Head Screws

Pull on the EVA3 front assembly to remove it

Pull on the EVA3 back assembly to remove it

Remove the four M3x8 Cap Head Screws

Remove the EVA3 mgn12 mount

Locate the rear cable holder

Remove the M6x12 Cap Head Screw

Remove the electronics_wire_guide_rear printed part from the frame

Remove the M6 3030 Drop in T-nut

Locate the Y endstop mount

Remove the two M3x12 Cap Head Screws

Disconnect the Enstop Module and set it aside, it will be re-used on the Rat Rig Toolhead V1.0

Remove the M5x12 Cap Head Screw

Remove the Y_max_endstop_slider printed part

Remove the M5x10 Cap Head Screw

Remove the Y endstop_max_block printed part

Remove the M5 3030 Drop in T-nut

Remove the M5x18 Cap Head Screw

Remove the EVA3 endstop block

Avoid moving the machine around at this point, os the M5 Drop in T-nut doesn't slide around on the gantry extrusion.

The V-Core 3.1 is now ready to receive the Rat Rig Toolhead V1.0 Upgrade kit

M5x18 Cap Head Screw

x_endstop printed part

Carefully insert the M5x18 Cap Head Screw into the already existing M5 Drop in T-nut

Remove the M3x45 Cap Head Screws

Remove the Stepper motor

Remove the M5x40 Cap Head Screws

Remove the three M6x14 Screws

If the M6 Drop in T-nuts fall off, loosely thread them in the screws so you can easly reinstall the CoreXY motor cage top easily.

Remove the CoreXY motor cage top

Remove both of the old belts, then insert the two new ones following the same paths

Reinstall the CoreXY motor cage top

Tighten the three marked M6x14 screws to secure the CoreXY motor cage top to the frame

Tighten the M5x40 screws to secure the bearing stacks into the CoreXY motor cage top

Position the NEMA17 motor up and into the motor cage from below, it will be secured in the next step

Insert the M3x35 screws into the xy_motor_cage_left_top as shown, and fasten them to secure the NEMA17 motor to the mount

Check the alignment of the timing pulley, the belt should be on the middle of the pulley as shown

Adjust the pulley up or down if required to make sure the belt is in the middle of the pulley

Fasten both M3 grub screws to securely mount the timing pulley to the NEMA17 motor shaft

Repeat Steps 21 - 24 for the other CoreXY motor mount cage.

This step is not mandatory, it's just a Rat Rig tip on how to feed the belts on the idlers.

Zip Tie

The wider the zip tie is, the easier the process will be

Bend the tip of the zip tie a little bit and feed it between the printed part and the idler, as shown

Insert the belt between the zip tie and the idler

Slowly feed the belt and pull the zip tie at the same time

Take the loose end of the top CoreXY belt on the left hand side:

Feed the belt behind the left xy_joiner

Down and around the front xy_idler

Around the front bearing stack on the left xy_joiner

Take the loose end of the bottom CoreXY belt on the left hand side:

Feed the belt around the rear bearing stack on the xy_joiner

Take the loose end of the bottom CoreXY belt on the right hand side:

Feed the belt behind the right xy_joiner

Down and around the front xy_idler

Around the front bearing stack on the right xy_joiner

Take the loose end of the top CoreXY belt on the right hand side:

Feed the belt around the rear bearing stack on the xy_joiner

3x M6x12 Cap Head Screw

2x M3x8 Cap Head screw

3x 3030 M6 Drop In T-nut

Y endstop

Y_endstop printed part

Umbilical_frame printed part

2x M6x12 Cap Head Screw

Install the M6 cap head screws into the printed part as shown.

Umbilical_frame printed part

3030 M6 Drop In T-nut

Loosely thread a 3030 M6 T-Nut onto the M6x12 screws. Do not tighten it at this point

Make sure the printed part is on the middle of the rear extrusion.

Tighten the M6x12 screw to secure the umbilical mount to the frame.

M6x12 Cap Head Screw

Y_endstop printed part

3030 M6 Drop In T-nut

Loosely thread a 3030 M6 T-Nut onto the M6x12 screw. Do not tighten it at this point

2x M3x8 Cap Head Screw

Y Endstop

Tighten the M6x12 screws to secure the endstop mount.

Ensure a 5mm gap between the 3030 extrusion and the Y_endstop printed part, this distance is required for the belts to operate smoothly.

Rat Rig toolhead plate

Rat Rig toolhead front printed part

Insert the rapido on the printed part as shown, and make sure the cables are positioned in the designated slot.

Look from above and see if all the holes line up correctly.

All the holes on the plate, hotend and printed part should line up:

If they align skip to step 35

If they don't align follow the next steps

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

Remove the 2.5 Cap Head Screws from the hotend

Carefully rotate the heatsink until the three screw holes align again.

There isn't a way to teel 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.

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 32-34 and try a different angle in step 34

1x Rat Rig toolhead duct printed part

1x Rat Rig toolhead back printed part

1x Rat Rig toolhead umbilical printed part

1x Rat Rig toolhead front printed part

17x Heat insert M3

If you bought the printed parts from Rat Rig, the heat inserts are already in place. Skip to Step 40.

Rat Rig toolhead front printed part

6x Heat insert M3

Rat Rig toolhead back printed part

5x Heat insert M3

Rat Rig toolhead duct printed part

This printed part has sacrificial layers. It is recommended to remove them by using a screwdriver, a hex key, or a drill, to push through the layers. This clears the holes for the screws.

4x Heat insert M3

Rat Rig toolhead umbilical printed part

2x Heat insert M3

1x Rat Rig toolhead plate

4x M3x6 Countersink Screw

Rat Rig toolhead plate

4x M3x6 Countersink Screw

Tighten the M3x6 Countersink Screws to secure the plate to the carriage.

Avoid using a ball end hex key, as they are more prone to damaging the sensitive M3 countersink screw head.

1x Rat Rig toolhead duct assembly

1x Rat Rig toolhead front assembly

2x M3x50 Countersink Screw

2x M3x50 Countersink Screw

Rat Rig toolhead front assembly

Rat Rig toolhead duct assembly

The M3x50 countersink screws must go through the holes on the front assembly

Take care not to over tighten the M3x50 screw 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.

1x Rat Rig toolhead back assembly

1x 4028 Part Cooling Fan

1x Rat Rig toolhead fan grille printed part

2x M3x40 Cap Head Screw

2x M3x45 Countersink Screw

Remove the four rubbers on the 4028 Part Cooling Fan

2x M3x45 Countersink Screw

Rat Rig toolhead back assembly

4028 Part Cooling Fan

Tighten the M3x45 screws.

Take care not to over tighten the M3x45 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.

2x M3x40 Cap Head Screw

Rat Rig toolhead fan grille printed part

Take care not to over tighten the M3x45 screws as you can damage the printed parts

Insert the belt on the toolhead slot, behind the screw.

Reverse the belt around the screw and then reinsert it into the slot.

Insert the belt on the toolhead grabber.

Repeat for the other front belt end.

1x Phaetus Rapido UHF Hotend

1x Rat Rig SuperPinda Probe by P&F

1x M3x5 Set Screw

1x PTFE tube - 24.5mm

4x M2.5x6 Countersink Screw

4x M2.5x6 Countersink Screw

Phaetus Rapido UHF Hotend

Place the Phaetus Rapido UHF Hotend on the plate, making sure to route the cables through the designated slot

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

Rat Rig SuperPinda Probe by P&F

The Rat Rig SuperPinda Probe needs to be at the correct height to trigger properly

A recommended method to set the correct height is to rest the hot end nozzle on the bed, and then place a cable tie between the bed and the tip of the probe

Adjust the probe up to down as necessary to position the tip 1mm higher than the hot end nozzle

M3x5 Set Screw

Tighten the M3x5 to secure the probe in place

Do not over-tighten the M3x5 screw, doing so can damage the probe or printed probe mount

1x Rat Rig toolhead umbilical assembly

1x ADXL 345 Accelerometer

1x X Endstop

2x M3x8 Cap Head Screw

2x M3x12 Cap Head Screw

2x M3x16 Cap Head Screw

If your configuration uses a toolboard, you can skip to Step 56. The toolboard mount will be installed later.

Rat Rig toolhead umbilical assembly

ADXL 345 Accelerometer

2x M3x12 Cap Head Screw

Mount the ADX 345 to the umbilical assembly

Take care not to over tighten the M3x12 screws as you can damage the printed parts

2x M3x16 Cap Head Screw

Tighten the M3x16 screws to secure the umbilical assembly to the plate.

Take care not to over tighten the M3x16 screws as you can damage the printed parts

2x M3x8 Cap Head Screw

X Endstop

Tighten the M3x8 screws to secure the X endstop to the toolhead.

Take care not to over tighten the M3x8 screws as you can damage the printed parts

1x 40x10mm 24V Axial Fan

1x Rat Rig toolhead shroud printed part

4x M3x16 Cap Head Screw

4x M3x16 Cap Head Screw

Rat Rig toolhead shroud printed part

40x10mm 24V Axial Fan

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

1x LDO Orbiter V2

2x M3x8 Cap Head Screw

2x M3x8 Cap Head Screw

LDO Orbiter V2

Insert the M3x8 screws into the LDO Orbiter V2 and fasten them to the Rat Rig toolhead plate.

Make sure the belt is properly seated on all idlers and pulleys.

Mark the belt where it meets the Rat Rig toolhead assembly. This can be done with a marker, or simply by holding it.

From the mark, towards the loose end of the belt, measure 23mm (or count 12 teeth)

It is better to cut the belt too long than too short! If you are unsure, cut it longer than expected, you can always remove more if needed

Double check your measurements and then cut the belt at this point

Rat Rig toolhead belt tensioner

M4 Nylon Locking Hex Nut

Insert an M4 nylon locking nut into the Rat Rig toolhead belt tensioner as shown

Insert the end of the belt inside the belt tensioner, and make sure the teeth are secured.

M4x40 Cap Head Screw

Tighten the M4x40 Cap Head just enough to hold the M4 Nylon Locking Hex Nut

The belts should not be tighten at this point.

Repeat Steps 60 and 61 to cut and insert the other belt.

The toolboard configuration is optional, please skip to Step 68 if you are not using it.

BIGTREETECH EBB42 USB/CAN TOOLBOARD V1.2

2x Hex standoff brass M3x20x4.5

Rat Rig toolhead_vc3_ebb42_vertical

5x M3x16 Cap Head Screw

4x Heat insert M3

2x M3x8 Cap Head Screw

Rat Rig toolhead_vc3_ebb42_vertical

4x Heat insert M3

This printed part has sacrificial layers which need to be removed prior to assembly.It is recommended to remove them by using a screwdriver, a hex key, or a drill, to push through the layers. This clears the holes for the screws to thread in to the head inserts

Thread the hex standoffs on to the LDO Orbiter V2 screws.

Do not overtighten the hex standoffs as they are brass and it is possible to strip the threads.

Insert the M3x16 Cap Head Screw in to the Rat Rig toolhead_vc3_ebb42_vertical printed part and thread it on the toolhead.

Assembly from Step 63

Take care not to over tighten the M3x16 screws as you can damage the printed parts

2x M3x8 Cap Head Screw

Insert the M3x8 Cap Head Screws in to the printed part and thread them to the hex standoffs

Take care not to over tighten the M3x8 screws as you can damage the printed parts

BIGTREETECH EBB42 USB/CAN TOOLBOARD V1.2

Insert the M3x16 Cap Head Screws into the toolboard and thread them into the vertical toolboard mount

Take care not to over tighten the M3x16 screws as you can damage the printed parts and the toolboard

Your V-Core 3.1 is now upgraded with the Rat Rig Toolhead V1.0 and it's ready to melt some filament!

A new toolhead is a big change for any 3D printer, make sure to follow the commissioning guide to properly tune it.