10. EVA 3.0 Hex Nut Assembly

1x Bondtech LGX Lite Extruder

1x EVA3 back_core_xy Printed Part

1x EVA3 drive_lgx_lite Printed Part

1x EVA3 front_universal Printed Part

4x Flat Square Nut - M3

1x EVA3 top_endstop_mgn12c Printed Part

18x Hex Nut - M3

4x M3x8 Cap Head Screw

EVA3 top_endstop_mgn12c Printed Part

Hex Nut - M3

Install an M3 hex nut into each of the three positions shown

Set this assembly aside until Step 14

EVA3 universal_front Printed Part

Hex Nut - M3

Install an M3 hex nut into each position shown, there should be four on the left and two in the top

EVA3 universal_front Printed Part

Hex Nut - M3

Install an M3 hex nut into each position as shown

The M3 hex nuts inserted into the side slots must be pulled into position using an M3 cap head screw

EVA3 universal_front Printed Part

Hex Nut - M3

Install an M3 hex nut into each position as shown

The M3 hex nuts inserted into the side slots must be pulled into position using an M3 cap head screw

Set this assembly aside until Step 16

EVA3 back_core_xy Printed Part

Hex Nut - M3

Install an M3 hex nut into each of the three positions shown

Set this assembly aside until Step 15

Bondtech LGX Lite extruder

Remove the two M3x25 screws holding the Bondtech LGX Lite together

Carefully remove the motor from the LGX Lite assembly

Set the LGX Lite motor aside until Step 26

Carefully remove the face plate from the LGX Lite assembly

M3 Square Nut

Insert one M3 square nut into each of the marked holes on the LGX Lite

Re-install the LGX Lite face plate

Carefully remove the rear plate from the LGX Lite assembly

Insert one M3 square nut into each of the marked holes on the LGX Lite

Re-install the LGX Lite back plate

Bondtech LGX Lite assembly

EVA3 drive_lgx_lite Printed Part

M3x8 Cap Head Screw

Install an M3x8 screw into each of the four positions shown. This will secure the LGX Lite extruder to the printed part

Take care not to over tighten the M3 screws as you can damage the printed part or the LGX Lite

Re-install the two M3x25 screws into the LGX Lite extruder

1x EVA3 bottom_horns Printed Part

4x M3x35 Cap Head Screw

4x M2.5x8 Cap Head Screw (Included with the Phaetus Rapido HF)

1x EVA3 hotend_rapido Printed Part

1x Phaetus Rapido HF Hotend

Follow the included assembly instructions to prepare the Rapido HF for use. The groovemount adapter which is pre-installed must be removed for use on EVA3

8x Hex Nut - M3

1x 43.7mm PTFE Tube

EVA3 hotend_rapido Printed Part

Hex Nut - M3

Install an M3 hex nut into each position as shown

EVA3 hotend_rapido Printed Part

Hex Nut - M3

Install an M3 hex nut into the four positions as shown

Assembly from the previous step

M2.5x8 Cap Head Screw

Phaetus Rapido HF assembly

Insert the four M2.5x8 screws through the printed part and fasten them into the Rapido HF hotend

43.7mm PTFE Tube

Insert the PTFE tube as shown, ensure it is fully pushed down into the hotend

Set this assembly aside until Step 30

4x M3x8 Cap Head Screw

Assembly from Step 2

Place the EVA3 top assembly atop the MGN12 carriage as shown

Make sure the holes on the side of the printed part face towards the left of the x-axis

M3x8 Cap Head Screw

Fasten all four M3x8 screws to secure the EVA3 top assembly to the MGN12 carriage

Slide the X-axis left and right along the rail to make sure it moves smoothly

If the carriage binds at all, slightly loosen the M3x8 screws and check again

EVA3 back assembly from Step 6

Position the EVA3 back assembly as shown

M3x35 Cap Head Screw

Insert the M3x35 screws through the EVA3 back assembly and into the MGN12 mount as shown

EVA3 front assembly from Step 5

Position the EVA3 front assembly as shown

Tighten the M3x35 screws to secure the EVA3 front assembly to the x-axis carriage

Take care not to over tighten the M3 screws as you can damage the printed parts

Take the end of the lower CoreXY belt and pass it through the side of the EVA3 front as shown

Pass the belt back out using the shown slot

Repeat these steps for the top CoreXY belt

The ends of both of these belts will be secured in Step 19

EVA3 bottom_horns_volcano Printed Part

Position the EVA3 bottom as shown

M3x35 Cap Head Screw

Install each M3x35 screw into the back, through the EVA3 bottom and secure them into the EVA3 front

Take care not to over tighten the M3 screws as you can damage the printed parts

2x EVA3 core_xy_belt_grabber Printed Part

3x M3x12 Cap Head Screw

2x M5 Nylon Locking Hex Nut

2x EVA3 face_belt_grabber Printed Part

6x M3x8 Cap Head Screw

2x M5x40 Cap Head Screw

Check that the CoreXY belt is still positioned from Step 16

Place the EVA3 face_belt_grabber printed part over the exposed belt end

Fasten two M3x8 screws through the EVA3 face_belt_grabber and into the universal face

Repeat the process on the left side of the EVA3 assembly

Take care not to over tighten the M3 screws as you can damage the printed parts

Loose end of the lower CoreXY belt

Mark the belt where it meets the EVA3 assembly. This can be with a marker, or simply by holding it.

From the mark, towards the loose end of the belt, measure 24mm (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

Insert the cut end of the belt into the core_xy_belt_grabber printed part

Insert an M5 nylon locking nut into the core_xy_belt_grabber as shown

Insert the core_xy_belt_grabber assembly into the EVA3 assembly as shown

M5x40 Cap Head Screw

Insert the M5x40 screw into the marked hole on the EVA3 assembly and fasten it slightly to engage with the M5 nylon locking nut

Do not tighten the M5x40 screw at this point. The belts will be tensioned correctly in a later guide

Loose end of the upper CoreXY belt

As in Step 20, mark the belt where it meets the EVA3 assembly. This can be with a marker, or simply by holding it.

From the mark, towards the loose end of the belt, measure 24mm (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

Insert the cut end of the belt into the core_xy_belt_grabber printed part

Insert an M5 nylon locking nut into the core_xy_belt_grabber as shown

Insert the core_xy_belt_grabber assembly into the EVA3 assembly as shown

M5x40 Cap Head Screw

Insert the M5x40 screw into the marked hole on the EVA3 assembly and fasten it slightly to engage with the M5 nylon locking nut

The M5x40mm screws are used to tighten the CoreXY belts

Tighten each M5x40 screw one-half turn at a time to tension the belts equally

Continue tightening the screws until the belts are no longer slack

Check that the X-axis gantry is square by moving it to the front of the machine. If it has skewed, it can be squared by adjusting the tension of one belt at a time

Make sure not to over-tension the belts as this can cause damage to the bearings, the belt, the motors or printed parts!

An excellent article on correct CoreXY belt tensioning is available on Mark Rehorst's website

Bondtech LGX Lite assembly from Step 9

Place the Bondtech LGX Lite assembly onto the top of the EVA3 assembly as shown

M3x8 Cap Head Screw

Fasten the two M3x8 screws through the drive_lgx_lite printed part into the EVA3 universal front

Take care not to over tighten the M3 screws as you can damage the printed parts

M3x12 Cap Head Screw

Fasten the three M3x12 screws through the drive_lgx_lite printed part into the EVA3 universal front

Bondtech LGX Lite motor from Step 7

Re-install the Bondtech LGX Lite motor into the back of the LGX Lite extruder

Fasten the two M3x25 screws on the face of the LGX Lite to secure the motor in place

1x EVA3 cable_guide Printed Part

2x M3x12 Cap Head Screw

2x Hex Nut - M3

1x ratrig_eva3_shroud Printed Part

1x EVA3 cable_guide_mount Printed Part

9x M3x8 Cap Head Screw

1x 40x10mm 24V Axial Fan

4x M3x20 Cap Head Screw

EVA3 cable_guide_mount Printed Part

M3x8 Cap Head Screw

Fasten the three M3x8 screws through the EVA3 cable_guide_mount printed part and into the EVA3 back

Hex Nut - M3

Install an M3 hex nut into each position as shown

EVA3 cable_guide Printed Part

M3x12 Cap Head Screw

Fasten the two M3x12 screws through the EVA3 cable_guide and into the EVA3 cable_guide_mount

Phaetus Rapido UHF hot end assembly from Step 13

Angle the hot end assembly as shown

Guide the PTFE tube into hole in the top of the EVA3 universal front

Rotate the hot end assembly into position as shown

Check that the assembly is aligned correctly. The M3 hex nuts should be visible through the marked holes

M3x8 Cap Head Screw

Fasten the four M3x8 screws through the EVA3 universal front and into the hot end assembly to secure it in place

Take care not to over tighten the M3 screws as you can damage the printed parts

The ADXL module won't appear in the rest of the guide, as it only started being offered in V-Core 3.1 kits since October 2023

ADXL accelerometer module

Align the ADXL module with the two holes in the EVA assembly

2x M3 nylon washers

The nylon washers are required to prevent damaging the sensitive electronics on the ADXL board

2x M3x8 Cap Head Screw

Tighten the M3x8 screws to secure the ADXL in place

Do not overtighten the screws as the ADXL will be permanently damaged

M3x20 Cap Head Screw

ratrig_eva3_shroud Printed Part

40x10mm 24V Axial Fan

Insert the M3x20 screws into the ratrig_eva3_shroud, through the 40mm fan and fasten them into the EVA3 front

3x M3x8 Cap Head Screw

1x M3 Nylon Locking Hex Nut

1x EVA3 lj8_probe_mount Printed Part

1x Rat Rig SuperPinda Probe by P&F

EVA3 lj8_probe_mount Printed Part

M3 Nylon Locking Hex Nut

M3x8 Cap Head Screw

The M3 nylon locking hex nut must be installed inside the lj8_probe_mount printed part

Fasten the M3x8 screw to pull the M3 nylon locking nut into position

EVA3 lj8_probe_mount assembly from the previous step

Position the probe mount assembly as shown

M3x8 Cap Head Screw

Fasten the two M3x8 screws through the probe mount and into the EVA3 assembly

Rat Rig SuperPinda Probe by P&F

Insert the probe into the probe mount as shown

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

Tighten the M3x8 to secure the probe in place

Do not over-tighten the M3x8 screw, doing so can damage the probe or printed probe mount

Correct probe vs nozzle position

1x Endstop Module

2x M3x8 Cap Head Screw

5x M3x35 Cap Head Screw

1x M3x25 Cap Head Screw

1x EVA3 40mm_fan_inlet Printed Part

1x 4028 Part Cooling Fan

5x Hex Nut - M3

1x M3 Nylon Locking Hex Nut

Endstop Module

M3x8 Cap Head Screw

Fasten the endstop module to the EVA3 assembly, as shown, using the M3x8 screws

These M3 screws fasten directly into the printed part. Take care not to over tighten them

EVA3 40mm_fan_inlet Printed Part

Hex Nut - M3

Insert an M3 hex nut into the 40mm_fan_inlet as shown

Fully install the M3 hex nut up and into the 40mm_fan_duct as shown

Repeat the process for the other three M3 hex nuts

EVA3 40mm_fan_inlet assembly from the previous step

4028 Part Cooling Fan

M3x35 Cap Head Screw

Fasten the four M3x35 screws through the 4028 cooling fan and into the hex nuts within the 40mm_fan_inlet

M3x35 Cap Head Screw

This M3x35 screw will be used in the next step to secure the 40mm_fan_inlet to the EVA3 assembly

Install the 40mm_fan_duct assembly as shown

Push the M3x35 screw though the EVA3 assembly and 40mm_fan_duct as shown

The tip of the M3x35 screw should extend out of the EVA3 assembly as shown

M3 Nylon Locking Hex Nut

Fasten the M3 nylon hex nut onto the M3x35 screw

Hex Nut - M3

Position the M3 hex nut as shown

M3x25 Cap Head Screw

Fasten the M3x25 screw through the 40mm_fan_duct and into the M3 hex nut

Take care not to over tighten the M3 screw as you can damage the printed parts