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03. Linear Rails

Written By: Simon Davie (and one other contributor)
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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 lengths, and required number of fasteners:

  • 200x200: 2x 250mm, 3x 300mm, 56x M3x12 Screw, 56x 3030 T-Nuts
  • 300x300: 2x 350mm, 3x 400mm, 76x M3x12 Screw, 76x 3030 T-Nuts
  • 400x400: 2x 450mm, 3x 500mm, 96x M3x12 Screw, 96x 3030 T-Nuts
  • 500x500: 2x 550mm, 3x 600mm, 116x M3x12 Screw, 116x 3030 T-Nuts

  1. 3x 400mm MGN12 Linear Rail

    • 3x 400mm MGN12 Linear Rail

    • There will be a fourth rail of this length in the kit. Leave that one in its packaging until later

    • 2x 350mm MGN12 Linear Rail

    • 84x M3x12 Cap Head Screw

    • 14x 3030 Drop-in T-Nut - M3

    • 2x MGN12 3030 Alignment Tool

  2. Paper Towels

    • Paper Towels

    • The linear rails are supplied with a protective oil coating on them, so prepare your work surface with disposable and absorbent paper towels

    • Linear Rail

    • Carefully open one end of the linear rail packaging and remove the rail. Place the rail upon the paper towels and dispose of the packaging

    • Take a paper towel and carefully wipe the excess lubricant from the rail

  3. With the rail still on the absorbent paper towels, carefully and slowly move the carriage from one end of the rail to the other The carriage should move smoothly over the entire length of the rail

    • With the rail still on the absorbent paper towels, carefully and slowly move the carriage from one end of the rail to the other

    • The carriage should move smoothly over the entire length of the rail

    • Small changes in resistance are normal, but the carriage becoming much harder to push, or binding completely are not

    • Repeat the previous test whilst applying a small amount of force downwards on the carriage

    • The carriage will likely travel more smoothly when applying a downwards force, this is normal

    • If the carriage does not move smoothly, or binds completely, refer to the Linear Rail Troubleshooting Guide

  4. Linear Rail Remove the plastic stops installed in the ends of the linear rail Do not allow the linear rail carriage to leave the end of the rail

    • Linear Rail

    • Remove the plastic stops installed in the ends of the linear rail

    • Do not allow the linear rail carriage to leave the end of the rail

    • Insert an M3x12 screw in each of the holes on the linear rail

    • Loosely thread a 3030 T-Nut onto each of the M3x12 screws

    • Repeat these steps for the other 4 rails

  5. V-Core 3.1 Frame Assembly 400mm MGN12 Linear Rail Assembly Insert the linear rail into the 3030 extrusion

    • V-Core 3.1 Frame Assembly

    • 400mm MGN12 Linear Rail Assembly

    • Insert the linear rail into the 3030 extrusion

    • The linear rail will rest on the lead screw motor cage

    • Install the two MGN12 3030 alignment tools as shown, this will make sure the linear rail is positioned correctly

    • Fasten the marked M3x12 screws, starting from the bottom

    • Fasten the remaining M3x12 screws, starting at the bottom

    • Remove the MGN12 3030 alignment tools

  6. 400mm MGN12 Linear Rail Assembly Insert the linear rail into the 3030 extrusion The linear rail will rest on the front lead screw motor cage

    • 400mm MGN12 Linear Rail Assembly

    • Insert the linear rail into the 3030 extrusion

    • The linear rail will rest on the front lead screw motor cage

    • Install the two MGN12 3030 alignment tools as shown, this will make sure the linear rail is positioned correctly

    • Fasten the marked M3x12 screws, starting from the bottom

    • Fasten the remaining M3x12 screws, starting at the bottom

    • Remove the MGN12 3030 alignment tools

    • Repeat these steps for the linear rail on the opposite side

  7. Installation of the Y-axis rails may be easier if you place the V-Core 3 frame upside down 350mm MGN12 Linear Rail Assembly Insert the linear rail into the 3030 extrusion

    • Installation of the Y-axis rails may be easier if you place the V-Core 3 frame upside down

    • 350mm MGN12 Linear Rail Assembly

    • Insert the linear rail into the 3030 extrusion

    • Position the linear rail so that its end touches the 3030 cast corner bracket as shown

    • Install the two MGN12 3030 alignment tools as shown, this will make sure the linear rail is positioned correctly

    • Fasten the marked M3x12 screws, starting from one end

    • Fasten the remaining M3x12 screws

    • Remove the MGN12 3030 alignment tools and repeat these steps for the linear rail on the opposite side

Author

with 1 other contributor

Simon Davie

Member since: 8/5/21

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