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      Check out the design on Sketchup Warehouse, where you can pan around using their 3D viewer: Openbuilds CO2 Laser Rail System for K40

      K40-openbuild-rail-system.png

      The goal of this build was to use as many off-the-shelf Openbuilds components as possible, leveraging bundles to simplify the build further. Still, there are a few pieces that need to be custom printed, such as the mirror and laser head mounting plates and the Mini V gantry shims. The gantry shims are essential to ensuring the height remains consistent as the beam travels from mirror to mirror.

      The main problem with stock "Cheap Chinese" "K40" 40W CO2 Laser cutters commonly purchased off of eBay is that they use custom, hard-to-find hardware of often questionable quality and consistency. Also, their chassis separates the tube and its fixed X Stage mirror from the moving Y Stage, thus making it nearly impossible to ensure the mirror heights stay consistent. This creates a needlessly painful alignment problem that many people constantly suffer from.

      Still, the core laser components provided in a stock K40 are serviceable, so the hope is that this replacement rail system will allow for a relatively affordable modification option that drastically simplifies the alignment process by improving the component quality and integrates the stages together to effectively turn a 3 dimensional alignment into a 2 dimensional one.

      Note: This design was created with the stock K40 chassis in mind. As such, it will fit within the chassis, but will require modification to remove internal walls (most notably the internal walls of the laser tube compartment.

      Thingiverse Links:
      21.2mm X Stage Shim for Mini V Gantry: Openbuilds Mini V Gantry Shim for K40 Laser Cutter - 21.2mm by megashub
      11.2mm Y Stage Shim for Mini V Gantry: Openbuilds Mini V Gantry Shim for K40 Laser Cutter - 11.2mm by megashub
      Laser Tube Mount by Crashoverride: K40 40W CO2 laser tube hanger by Crashoverride

      Openbuilds Parts:
      Mini V Linear Actuator Bundle: V-Slot® Mini V Linear Actuator Bundle
      V-Slot Linear Rail (2020 and 2080): V-Slot® Linear Rail
      Double T-Nut: Double Tee Nut™
      Corner Bracket: Black Angle Corner Connector
      Low Profile M5 Screw: Low Profile Screws M5

      Build License: CC - Attribution NonCommercial - Share Alike - CC BY NC SA

      Also: Shout out to Ariel for their K40 rail system mod: UK40OB

      Attached Files:

      1. Special Notes

        This build does require a few small 3D printed custom parts to make the rails stack up to the same height as the first stage mirror. See the full description for Thingiverse links to those files.
      ldfasdoip and Anthony Bolgar like this.
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  • Build Details

    Build License:
    • CC - Attribution NonCommercial - Share Alike - CC BY NC SA

    Reason for this Build

    The main problem with stock "Cheap Chinese" "K40" 40W CO2 Laser cutters commonly purchased off of eBay is that they use custom, hard-to-find hardware of often questionable quality and consistency. Also, their chassis separates the tube and its fixed X Stage mirror from the moving Y Stage, thus making it nearly impossible to ensure the mirror heights stay consistent. This creates a needlessly painful alignment problem that many people constantly suffer from.
  • Parts list

    Qty Part Name Part Link Comments
    3 V-Slot Mini-V Linear Actuator Bundle http://openbuildspartstore.com/v-slot-mini-v-linear-actua... Link
    1 V-Slot Linear Rail (2080) http://openbuildspartstore.com/v-slot-linear-rail/ Link Buy 500mm just in case.
    4 Double T-Nut http://openbuildspartstore.com/double-tee-nut/ Link
    6 Black Angle Corner Connector http://openbuildspartstore.com/black-angle-corner-connector/ Link
    4 Low Profile Screws M5 http://openbuildspartstore.com/low-profile-screws-m5/ Link Various lengths from 8mm to 55mm -- Will update with exact quantities and lengths after I've built one myself.
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