Author - HP Persson

Buyers guide to the Chinese K40 laser

This article is aimed to you looking to buy a K40 laser machine, but want more information before you decide yourself to buy one or not. Read this article, and check out all other articles about the k40 to get more information about this family of machines. Feel free to join the Facebook group if you have further questions. The machine Different types of K40 cases The K40 is often blue and white, but comes in a variation of colors, black-red, red-white, orange-black and [...]

Read more...

Warning for new machine owners – grounding issues

This is a short warning with information how to solve the issue. More and more machines are delivered with deadly configuration on the grounding of the electronics. In China, the electric standard is not well built and many houses still do not have ground solutions in their house. So the machines are built by their standard, when we in EU or US or other parts of the world often have a good ground setup already in our homes since many years. If [...]

Read more...

Mirror alignment – the ultimate guide

Welcome to the ultimate alignment guide for your laser machine. This guide has some tips and hints regarding the popular K40 machine type, but this can be used for any laser machine on the market as the science behind movement of a laser beam is the same on all of them. 90% of the errors in laser machines are not skewed or non-square gantrys, it´s bad alignment of the three mirrors in the machine not lining up with each other. Some of [...]

Read more...

Setting the proper focus in your K40

Focus is very important for your work, if you are out of focus you will lose power or get strange effects when engraving. This is the most common issue with new users on the k40 machine, the information from the seller how to use the k40 is very limited so this information is not there and a new user tend to search for other problems causing it, when it´s actually the bed and focal distance doing it. So, what is focus? You [...]

Read more...

K40D the upgrade project – part one

The K40D is well known for beeing one of the better K40 versions out there, with it´s upgraded controller board (HT Master) and the famous gold-ish styled gantry. Is it really possible to upgrade this beast? sure, or, maybe? let´s find out! This project will be massive with deep diving into most of the stuff the laser is made up of, everything from the controller, water cooling, electric and buttons and so on. Even if you have a regular K40 you can [...]

Read more...

Watercooling – a deep dive

This article is work in progress, suggest changes or addons to it in the comments. Cooling your laser tube is one of the most important things you have to do 110% on your machine. The most expensive part in your machine is the laser tube and a new one will set you back 100-150 USD plus a month of waiting if you can´t find one locally or pay premium shipping. With this article i want to go trough the watercooling, how [...]

Read more...

Upgrade your power supply – save money and time

This article is just the findings and results we found on several PSU´s but we cannot yet explain why or how this happens. Are you a electric engineer or have knowledge about the workings of the PSU and able to explain this phenomena in greater detail? comment below or contact me trough email – thanks! The power supplys in our beloved K40 machines are poorly built, the power in them is barely enough for running the machine itself. I have been following [...]

Read more...

Troubleshooting a “no fire” issue

Quick troubleshooting when the machine is not firing the laser any more. To begin with, make sure all wires and connections are good in the machine and make sure all cables are where they should be. 1: Start the machine Check the fuses in the back of the machine in the connector. 2: Do a test fire on the panel If the machine fires, you dont have a problem 🙂 If the machine do not fire, go to 3. 3: Do a test fire on the [...]

Read more...

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 [...]

Read more...

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. Tools you need – Soldering iron and solder – Wire stripper and cutter Parts [...]

Read more...