Here you can find DIY articles on how to improve your K40 machine.
We focus on alot of different guides, everything from improving your smoke assist to better alignments.

Install a mA-meter on your K40 laser

Adding a mA-meter to your machine is one of the most important modifications you can do on this machine. The mA-meter will read the power trough your laser tube allowing you to set the power to a safe value to prevent the laser tube from over powering and thus saving the life span of the laser tube. Read more here about the most common reasons why your laser tube dies. Tools needed - Wire stripper, cutter and crimp tool. - Pliers or small wrench [...]

Upgrade your analog power knob

This is a upgrade of the analog power potentiometer to give you better control over the power level. It´s also easier to remember a number than a location of the pot. You can buy this from me prebuilt, ready to connect to your machine here. Or follow this guide to make your own! If you want to convert your digital K40 to analog with this solution - check out this conversion article. https://www.youtube.com/watch?v=PnDlF1QEebI Tools you need - Soldering iron and solder - Wire stripper and cutter Parts [...]

Upgrades & improvements on the K40

The K40 machine is a awesome little product who makes it easy for hobby and semi-pro use to get going with laser cutting or engraving. It´s far from perfect and needs a hand to work as you intended. First reading should be the article about checking your machine - read it here. Water cooling Coolant tank Depending on where you live, it might be a good option to have a bigger tank 15-25L or more. If you live in a hot climate, you need a [...]

Mirror alignment – no more sweat and tears – Updated!

This is the old alignment guide - check out the new guide here! Mirror alignment is the action many of us fear the most, looking at videos and reading guides and after two weeks your mirrors are still not aligned. Many of the guides and how to´s forget the most important part of aligning, that the pieces you try to align actually are aligned themselves. I have therefore made this guide in three parts, with three steps in each part., how you [...]

Adding more parts to the machine, lights and other.

The K40 machines differs a lot in what parts and function is has added, some has extra lights, laser dots and different parts already fitted, others are bare lasers. These machines are already on the edge of what the power supply can handle, adding more load to it may create problems. To solve this, we suggest that everything you add to the machine is connected trough a own power supply or smaller wall plug with correct voltage. Doing this you can rule [...]

3D printed parts – in a laser?

Home and desktop machines as lasers, 3D printers and other CNC are more avalible for everyone nowadays, this introduces a lot of modifications and bits and pieces to extend or make your laser better. Some voices has been raised about using 3D printed parts inside a laser, heat and PLA/ABS plastic is usually not a good combination. But in the lasers there is really no danger about it. You can use parts close to the beam or other parts without any [...]

Tilt your PSU´s – save your PSU from dying

The most important thing with electronics is sufficient cooling. You don´t need to follow this article and flip your PSU, but look into adding one or more fans to take out the hot air from the smaller compartment. Electronics are sensitive for heat and high temperatures. The higher temps the less efficiency you get out of the PSU. And now we are talking about Chinese middle class quality the temperatures are more important than ever. Here is my solution to this problem. [...]

A word on USB-hubs

A small note on usb-hubs and using older computers or pad´s to run the machines. All computers has a usb-host controller, this one controls the data sent out and powers the ports. On older computers or smaller laptops there is one host-controller for all ports. On newer machines there is often one controller per port, or per set of ports.   What may happen is your laser starts to freeze up, it hesitates for a half second and then runs again. This happens because [...]