The Illustrated Guide to Building a Micro CNC Milling Machine


What is "Building the KRmf70 CNC"?

It's a book that takes you step-by-step through the process of building your very own Micro CNC Milling Machine.

What is the KRmf70 CNC?

The KRmf70 CNC is a fully automated CNC based on the popular Proxxon MF70 milling machine. The Proxxon MF70 milling machine is used as the donor machine so all its clamps, vises and tooling can be used for CNC purposes.


Step-by-step Instructions


The instructions for building the KRmf70 are in the form of book. This book consists of 132 pages grouped into 13 chapters. The book will take you step by step through the process of building the KRmc01 CNC.

The book takes you step-by-step through the process of converting the donor MF70 mill into a fully automatic CNC machine.

KRmf70 CNC Machine Specifications

  • Motor HP: 1/8 hp
  • Motor Speed Range: 5000-20000 RPM (Electronic Speed Control)
  • X Travel: 5-17/64"
  • Y Travel: 1-13/16"
  • Z Travel: 2-3/4"
  • Stepper Motors: NEMA 17

There is no fabrication involved with the KRmf70 CNC. The build starts you out by having you purchase a Proxxon MF70 milling machine, electronics, and various conversion components. A complete list of components with links are provided with the book.

Once you have the components, the book takes you step-by-step through the conversion process. The book shows you what to look for and how to test fit where needed. The complete build can be accomplished in just a few days.

The book does not stop with the conversion process. It takes you through the setup, configuration, and testing of the machine.

See the KRmf70 in action here:


What can I make with the KRmf70 CNC?

While won't be able to make guitars with the KRmf70, you can use it to fabricate small parts used in modeling. Its small size allows it to easily set on any desktop. 


What does it cost to build the KRMf70 CNC?

It will cost you a little over $700 to build the KRmf70 CNC.  Most of that cost is the MF70 milling machine.