Steps
27
- 04. Rat Rig Toolhead V2.0 27 steps
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Introduction
This guide provides a thorough overview of the disassembly of the EVA3, the preparation of the V-Core 3.1 frame, and the installation procedure for the Rat Rig toolhead V1.0 Upgrade Kit.
The Rat Rig Toolheads are streamlined to be used specifically with our favourite combination:
Orbiter V2
Phaetus Rapido UHF hot end
4028 part cooling fan
Rat Rig “SuperPinda” Probe by P&F
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This guide is divided into 3 parts, to help you quickly find the instructions you need:
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Disassembling the EVA 3.0
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Preparing the V-Core 3.1 for the upgrade kit
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Installing the Rat Rig toolhead v1.0 upgrade kit
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Remove the M3x25 Cap Head Screw
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Remove the Hex Nut - M3
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Remove the M3 Nylon Locking Hex Nut
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Remove the M3x35 Cap Head Screw
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Remove the 40mm_fan_duct assembly as shown
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Remove the four M3x35 Cap Head Screws
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Remove the 4028 Part Cooling Fan from the printed part, it will be re-used on the Rat Rig Toolhead V1.0
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Remove the four Hex Nuts - M3
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Remove the two M3x8 Cap Head Screws
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Disconnect the Endstop Module and set it aside, it will be re-used on the Rat Rig Toolhead V1.0
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Loosen the M3x8 Cap Head Screw
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Remove the Z-probe from the printed part, it will be re-used on the Rat Rig Toolhead V1.0
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Remove the three M3x8 Cap Head Screws
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Remove the four M3x20 Cap Head Screws
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Remove the ratrig_eva3_shroud Printed Part
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Remove the 4010 Axial Fan from the assembly, it will be re-used on the Rat Rig Toolhead V1.0
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Remove the four M3x8 Cap Head Screws
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Remove the four M3x8 Cap Head Screws
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Gently push the hotend assembly down and away from the toolhead-
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Rotate the hot end assembly into position as shown
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Remove the PTFE line
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Remove the four M2.5x8 Cap Head Screws
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Remove the Rapido hotend from the printed part, it will be re-used on the Rat Rig Toolhead V1.0
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Tip: Insert the four M2.5x8 Cap Head Screws back in the Rapido hotend mounting points to avoid losing them.
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Remove the two M3x25 screws on the face of the LGX Lite which secure the motor in place
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Remove the Bondtech LGX Lite motor from the back of the LGX Lite extruder
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Remove the three M3x12 Cap Head Screws
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Remove the two M3x8 Cap Head Screws
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Remove the extruder assembly
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The new Rat Rig toolhead uses the Orbiter V2,
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Remove the M3x8 Cap Head Screws holding the LGX Lite to the EVA3 drive_lgx_lite Printed Part
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Reassemble the LGX Lite so you can safely store it.
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Loosen the M5x40 Cap Head Screw
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Pull the belt to help remove the CoreXY belt grabber
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Remove the M5 nylon locking nut
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Remove the belt grabber from the toolhead
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Repeat the previous steps and remove the other CoreXY belt grabber
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Remove the two M3x8 Cap Head Screws
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Remove the belt front belt holder
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Repeat the previous steps for the other front belt holder
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Remove the two M3x35 Cap Head Screws
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Pull down on the EVA horn ducts
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Remove the two M3x35 Cap Head Screws
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Pull on the EVA3 front assembly to remove it
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Pull on the EVA3 back assembly to remove it
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Remove the four M3x8 Cap Head Screws
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Remove the EVA3 mgn12 mount
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Some components of the V-Core 3.1 need to be upgraded to support the new Rat Rig Toolhead. The following steps will show you how.
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Locate the rear cable holder
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Remove the M6x12 Cap Head Screw
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Remove the electronics_wire_guide_rear printed part from the frame
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Remove the M6 3030 Drop in T-nut
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Locate the Y endstop mount
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Remove the two M3x12 Cap Head Screws
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Disconnect the Enstop Module and set it aside, it will be re-used on the Rat Rig Toolhead V1.0
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Remove the M5x12 Cap Head Screw
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Remove the Y_max_endstop_slider printed part
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Remove the M5x10 Cap Head Screw
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Remove the Y endstop_max_block printed part
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Remove the M5 3030 Drop in T-nut
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Remove the M5x18 Cap Head Screw
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Remove the EVA3 endstop block
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Avoid moving the machine around at this point, os the M5 Drop in T-nut doesn't slide around on the gantry extrusion.
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The V-Core 3.1 is now ready to receive the Rat Rig Toolhead V1.0 Upgrade kit
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The next steps will cover the assembly of the Rat Rig toolhead V1.0 upgrade kit
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M5x18 Cap Head Screw
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x_endstop printed part
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Carefully insert the M5x18 Cap Head Screw into the already existing M5 Drop in T-nut
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Remove the M3x45 Cap Head Screws
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Remove the Stepper motor
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Remove the M5x40 Cap Head Screws
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Remove the three M6x14 Screws
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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.
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Remove the CoreXY motor cage top
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Remove both of the old belts, then insert the two new ones following the same paths
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Reinstall the CoreXY motor cage top
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Tighten the three marked M6x14 screws to secure the CoreXY motor cage top to the frame
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Tighten the M5x40 screws to secure the bearing stacks into the CoreXY motor cage top
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Position the NEMA17 motor up and into the motor cage from below, it will be secured in the next step
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Insert the M3x35 screws into the xy_motor_cage_left_top as shown, and fasten them to secure the NEMA17 motor to the mount
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Check the alignment of the timing pulley, the belt should be on the middle of the pulley as shown
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Adjust the pulley up or down if required to make sure the belt is in the middle of the pulley
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Fasten both M3 grub screws to securely mount the timing pulley to the NEMA17 motor shaft
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Repeat Steps 21 - 24 for the other CoreXY motor mount cage.
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This step is not mandatory, it's just a Rat Rig tip on how to feed the belts on the idlers.
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Zip Tie
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The wider the zip tie is, the easier the process will be
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Bend the tip of the zip tie a little bit and feed it between the printed part and the idler, as shown
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Insert the belt between the zip tie and the idler
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Slowly feed the belt and pull the zip tie at the same time
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Take the loose end of the top CoreXY belt on the left hand side:
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Feed the belt behind the left xy_joiner
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Down and around the front xy_idler
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Around the front bearing stack on the left xy_joiner
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Take the loose end of the bottom CoreXY belt on the left hand side:
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Feed the belt around the rear bearing stack on the xy_joiner
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Take the loose end of the bottom CoreXY belt on the right hand side:
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Feed the belt behind the right xy_joiner
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Down and around the front xy_idler
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Around the front bearing stack on the right xy_joiner
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Take the loose end of the top CoreXY belt on the right hand side:
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Feed the belt around the rear bearing stack on the xy_joiner
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