Laser Engraving Slate CoastersLaser Engraving Slate Coasters

The match-up of the century!! K40 Laser VS Slate Coasters! In THIS corner…40 Watts of unadulterated photonic energy…VERSUS… the metamorphic material that tends to split along parallel cleavage planes known the world over as SLATE! Will the K40 Laser be able to create awesome engravings on very versatile and classy slate coasters complete with cute little foam feet?? Stay tuned to find out!

Augmented Reality LivestreamAugmented Reality Livestream

This is a small preview of something I have been working on here and there for a while now, an AR or Augmented Reality Twitch stream setup. This is just a quick preview of what I have gotten working so far, and trying to gauge interest if I should reinvestigate this project. It was made using OBS, the Unity Video Game Engine and the Vuforia AR system. I definitely would love to spend more time and develop this idea bit further as I really think the idea is very intriguing!

Secret Sidewalk MessagesSecret Sidewalk Messages

This is a quick and easy summer time project to bring hidden messages and pictures to life! It utilizes a hydrophobic spray and a cardboard stencil with your design. Where ever the spray coats the sidewalk, it repels water, so taking advantage of this property, I was able to make some really cool hidden sidewalk art around my home and neighborhood. Just note that this spray was a lot more long lasting than had originally had hoped, which isn’t an issue for me, but could be for you. Just something to keep in mind!

(Purchasing this item using my product link costs you nothing and helps out the channel. Thanks!)

DIY Rotary for the K40 LaserDIY Rotary for the K40 Laser

After many requests, I have finally put together a guide to make your own rotary module for your K40 laser engraver! This is a surprisingly simple build and will undoubtedly be the best accessory you will have for your K40! While there are 3D printed parts in this project, I have listed alternatives for those pieces so access to a printer is not entirely necessary.

If you are looking to get a Glowforge Laser, you can use my referral code to get: $600 off a pro, $300 off a plus, or $150 off a basic! I’ll get credit too!

Glowforge Link->

Links to all Parts:

3D Printed Rotary Chassis File –
Laser Cut Rotary Chassis .svg File –

3D Printed Belt Pulleys File-
Metal Belt Pulleys for Linear Rod (GT2- 40 Teeth):

NEMA 17 Stepper Motor :

Rubber Grommets (5/16 I.D. x 5/8 O.D):

Skateboard Bearings – 608-2RS 8x22x7mm:

Rubber Belt (GT2-200- 6mm):

Metal Pulley for Stepper Motor (GT2- 20 Teeth 6mm):

Linear Motion Rod (8mm x 300mm):

Heat Shrink:

Wire Loom Cable Wrap:

M3 Hex Screws (9mm long) for Stepper Motor Mounting:

Stainless Steel Ruler:

Pneumatic Nibbler:


Amazon K40 Laser Link: (These go in and out of stock often, so I will try to keep these K40 links current in hopes you can find one!)

For a Laser that has an even BIGGER cutting capacity and MORE cutting power than the K40 or Glowforge AND still cheaper than the Glowforge. (Sometimes these can come with Rotarys as well, just be sure to double check)

If you are still looking to get a Glowforge Laser, you can use my referral code to get:
$600 off a pro, $300 off a plus, or $150 off a basic!
I’ll get credit too! Use the link below.

The above links are Amazon Affiliate links and help support Geeksmithing Projects.