This modular CNC machine is based on the OpenBuilds ACRO System, however I wanted something that did more than just laser engrave. So I designed my machine using the same style as the ACRO but with some upgrades such as an actual Z-axis and the ability for multiple tool attachments.

The OpenBuilds ACRO System was developed to be the most accurate and cost effective positioning system in its class. The ACRO System incorporates the OpenBuilds V-Slot system and, therefore, has the unique ability to expand to multiple sizes creating a size configuration custom to your needs. Choose the size that best fits your workshop. This versatile system allows for precise positioning of many different mountable tools and attachments.

Mill drill using a dremel and some 3d printed parts

Building my First CNC for PCB milling. Some modification done to the original build from OpenBuild Bundle.

Using basic standard components, beams, motors, belt drive on x and y, z is a screw. Using Grbl Panel on Windows 10. Really basic router, had trouble getting the controller to turn on the router and set speeds so it is currently wired to a power bar switch so it runs full speed and I just use the switch to turn it on and off. Just getting x, y and z control working properly for now and likely going to switch the router to my dremel 4000 using a 3d printed mounting bracket I got from thingiverse

The idea was to use materials from previuos failed projects into a succesful one. I have build this tiny but powerfull CNC machine mainly using the universal gantry plates for the X and Y axis. Also another innovative part is the fact that I assembled the Z gantry with 2 aluminum sections of 20X40 and one aluminum seccion of the 20X20. I used NEMA 17 stepper motors with GT2 pulleys. This was designed on Fusion360

modifying ACRO