¶ Introduction
Please note: All measurements and component counts provided in this guide are based upon building a 300x300 V-Core 3.
If you are building a machine of a different size, please refer to the following list for the linear rail length, 2020 extrusion length, and required number of fasteners:
- 200x200: 300mm Linear Rail, 322mm 2020 Extrusion, 6x M3x8 Screw & 2020 T-Nuts
- 300x300: 400mm Linear Rail, 422mm 2020 Extrusion, 8x M3x8 Screw & 2020 T-Nuts
- 400x400: 500mm Linear Rail, 522mm 2020 Extrusion, 10x M3x8 Screw & 2020 T-Nuts
- 500x500: 600mm Linear Rail, 622mm 2020 Extrusion, 12x M3x8 Screw & 2020 T-Nuts
¶ Step 1 - Prepare the x-axis end parts
- 1x xy_joiner_left_3.1 Printed Part
- 1x xy_joiner_right_3.1 Printed Part
- 4x 695ZZ Ball Bearing
- 8x F695ZZ Ball Bearing
- 12x Mini Precision Shim
- 8x 6mm Aluminium Spacer
- 4x M5x55 Cap Head Screw
¶ Step 2 - Assemble the left x-axis end - Part 1
- M5x55 Cap Head Screw
- xy_joiner_left_3.1 Printed Part
- Install the following components in the order shown in the image:
- Mini Precision Shim
- F695ZZ Ball Bearing (Flange at the top)
- 695ZZ Ball Bearing
- F695ZZ Ball Bearing (Flange at the bottom)
- 6mm Aluminium Spacer
¶ Step 3 - Assemble the left x-axis end - Part 2
- M5x55 Cap Head Screw
- Assembly from the previous step
- Install the following components in the order shown in the image:
- Mini Precision Shim
- F695ZZ Ball Bearing (Flange at the top)
- 695ZZ Ball Bearing
- F695ZZ Ball Bearing (Flange at the bottom)
- 6mm Aluminium Spacer
¶ Step 4 - Assemble the right x-axis end - Part 1
- M5x55 Cap Head Screw
- xy_joiner_right_3.1 Printed Part
- Install the following components in the order shown in the image:
- Mini Precision Shim
- F695ZZ Ball Bearing (Flange at the top)
- 695ZZ Ball Bearing
- F695ZZ Ball Bearing (Flange at the bottom)
- 6mm Aluminium Spacer
¶ Step 5 - Assemble the right x-axis end - Part 2
- M5x55 Cap Head Screw
- Assembly from the previous step
- Install the following components in the order shown in the image:
- Mini Precision Shim
- F695ZZ Ball Bearing (Flange at the top)
- 695ZZ Ball Bearing
- F695ZZ Ball Bearing (Flange at the bottom)
- 6mm Aluminium Spacer
¶ Step 6 - Prepare the x-axis parts
- 1x 422mm 2020 Extrusion
- 1x 400mm MGN12 Linear Rail
- 8x M3x8 Cap Head Screw & 2020 Drop-in T-Nut - M3
- 4x M5x10 Cap Head Screw
- 6x 2020 Square T-Nut - M5
- 1x M5x18 Cap Head Screw
- 1x M5x12 Cap Head Screw
- 1x x_endstop_block_3.1 Printed Part
¶ Step 7 - Install the x-axis gantry fasteners
- Assembly from Step 3
- M5x10 Cap Head Screw
- 2020 Square T-Nut - M5
- Loosely thread a 2020 Square T-Nut onto each of the M5x10 screws
- Assembly from Step 5
¶ Step 8 - Assemble the x-axis gantry - Part 1
- 422mm 2020 Extrusion
- 2020 Square T-Nut - M5
- Install one 2020 Square T-Nut into the top slot on each end of the 2020 extrusion
- Install the left x-axis end onto one end of the 2020 Extrusion
- Install the right x-axis end onto the other end of the 2020 Extrusion
- Make sure the x-axis ends are fully installed on the 2020 extrusion before proceeding
¶ Step 9 - Assemble the x-axis gantry - Part 2
- Tighten the marked M5x10 screws to secure the x-axis ends to the 2020 extrusion
- 400mm MGN12 Linear Rail
- Insert an M3x8 screw into each of the holes on the linear rail
- Loosely thread a 2020 T-Nut onto each of the M3x8 screws
- Install the linear rail into the 2020 extrusion as shown
¶ Step 10 - Assemble the x-axis gantry - Part 3
- Fasten the marked M3x8 screws, starting from the left
- x_endstop_block_3.1 Printed Part
- M5x18 Cap Head Screw
- Make sure the previously installed 2020 square T-Nut is aligned with the marked hole. A small screwdriver or hex key can be used to help position it correctly
- The correct positioning for the x_endstop_block will be set when building the EVA3 assembly at a later point
- Take care not to over tighten the M5x18 screw as you can damage the printed parts
¶ Step 11 - Assemble the X-axis gantry - Part 4
- M5x12 Cap Head Screw
- Make sure the previously installed 2020 square T-Nut is aligned with the marked hole. A small screwdriver or hex key can be used to help position it correctly
- Take care not to over tighten the M5x12 screw as you can damage the printed parts
¶ Step 12 - Prepare the X-axis gantry plate parts
- 2x xy_joiner_plate
- 4x M5 Nylon Locking Hex Nut
- 8x M3x8 Cap Head Screw
¶ Step 13 - Install the x-axis joiner plates
- xy_joiner_plate
- Check that the xy_joiner_plate is installed in the correct orientation. It should be flush with the xy_joiner printed part. If it is not, flip the plate upside down and check again
- M5 Nylon Locking Hex Nut
- Tighten the M5x55 screws into the M5 nylon locking hex nuts to secure the plate to the printed part
- Repeat these steps for the right hand side
¶ Step 14 - Install the x-axis assembly
- V-Core 3.1 Frame Assembly
- X-axis Assembly (Right side)
- M3x8 Cap Head Screw
- Secure the right side of the x-axis to the right y-axis linear rail as shown
- X-axis Assembly (Left side)
- Secure the left side of the x-axis to the left y-axis linear rail as shown
¶ Step 15 - Test the y-axis movement
- Test the movement of the y-axis over the full travel distance
- Small changes in resistance are normal, but becoming much harder to push, or binding completely are not
¶ Step 16 - How to easily insert the belts
- 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
¶ Step 17 - Route the CoreXY belts - Part 1
- 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
¶ Step 18 - Route the CoreXY belts - Part 2
- 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
¶ Step 19 - Next guide
- Continue with the next guide: 07. Bed Arm Assemblies