most popular. This Smoothie firmware-based
board supports external displays/controllers,
grayscaling, rotary axis tools, air-assist relays,
and advanced software packages like LightBurn.
• Price: $230, ROI: 7
• Ease of installation: 4
• Link to part: cohesion3d.com/shop/controllers/
cohesion3d-laserboard
• Instructions: cohesion3d.com/knowledgebase/
k40-with-m2nano-cohesion3d-laserboard-
installation
• Recommendation: NICE TO DO
6
LIGHTBURN CAMERA
This camera mounts in the lid and works with
the LightBurn software to allow a picture of the
material on the cutting bed to be used in the
software to orient and position the images and
lines to be engraved or cut. It’s not essential, but
once you use it, you’ll never ever want to go back
to other registration methods. It comes as a thin
PCB; I printed an enclosure for mine.
• Price: $80, ROI: 8
• Ease of installation: 5
• Link to part: cohesion3d.com/shop/
peripherals/lightburn-camera/official-
lightburn-camera
• Instructions: lightburnsoftware.github.io/
NewDocs/UsingACamera.html
• Recommendation: NICE TO DO
7
LID STAND
The K40 lid will rest in the “far back” position
(about 15° past vertical,) but given a bump or
strong wind, it can come crashing down. This isn’t
a big problem, but using a lid stand definitely feels
safer.
• Price: $0, ROI: 10
• Ease of installation: 10
• Link to part: Scrap material and 3D printed (or
laser cut!) parts
• Recommendation: NICE TO DO
(MUST DO if using LightBurn camera)
SKILL BUILDER: K40 Upgrades
makezine.com116
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7
8
10
9
NOTE: To use the LightBurn camera, you need
to have the lid positioned consistently at about 60%
of full open. I addressed this by cutting a piece of ½"
angle aluminum and 3D printing ends that fit on the
K40 base and lid. When I wedge open the lid with it, I
know it’s in the correct position for the camera.
M81_114-19_K40upgrades_F1.indd 116M81_114-19_K40upgrades_F1.indd 116 4/12/22 12:57 PM4/12/22 12:57 PM
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