DIY CNC Modernization of an Old Universal Milling Machine
The base machine is an romanian Infratea Oradea FUS 200 mill. It's really similar to machines like Deckel FP1 / GHA Alexander "Master Toolmaker" / Prvomajska ALG 100 / Stankoimport 676 / AVIA FNC25 / Schaublin 13.
This is a video showing the process of modernization of the milling machine from the state where it was a bit refreshed to the moment where it fully works and some tests were made at the end of the video.

The 3D model and wiring diagram are available for my patrons here on YouTube and Patreon.com.

The whole process including refreshing the machine from a scrapyard condition to a working CNC took about 8 months. The CNC modernization took about half of that time.
I was thinking about building a CNC milling machine from scratch but I found this little machine (~900kg / 1980lbs) for ~$800. So I decided to give it a try.
Firstly during the disassembly process I took some measurements so I could make a 3D model out of it. This made things much easier later when I was designing the mechanical part of it.
This project cost me about ~$3600 including the base machine, SFU1605 ball screw for Y axis and DFU2505 ball screws for X and Z axis, some aluminium and steel stock for essential parts like motor mounts / ball screws adapters, chinese 750W AC servos in each of all 3 axis, pulleys, some tools I didn't have, a VFD for the spindle motor, an incremental encoder for rigid tapping, lots of electrical devices, cables, paint, pump motor and some more things I probably even don't remember. Also my girlfriend sacrificed her old desktop computer to put it in the machine (I love you ❤).
I hope you enjoyed the video and the building process! If you did please share it with friends. This might let me to continue my hobby :)

If you find my channel interesting or helpful you might consider becoming my Patron on Patreon.com or a Member of my YouTube Channel Support!
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Questions? Comment down below.
Thanks for watching!

Basic parameters:
Spindle 1.9 [kW] / 502800 [RPM]
Movement range X/Y/Z 246/165/280 [mm]
Axis Servos 80STM02430 750 [W] 3000 [RPM]
Feed speeds (5000 [mm/min] in X/Y/Z) This machine could run even 7500 [mm/min] but I find it just too fast. Probably smaller servos like 400W with right pulleys would be enough for feed speeds for a small machine with a slow 2800 [RPM] spindle
Ball screws in all axis SFU1605 on Y and DFU2505 on X/Z.
AXBBE Controller with UCCNC software (ethernet connection)
Rigid Tapping ability using incremental 200PPR encoder on the shaft
Table with two 700 [N] gas springs to make the Z axis run easily with same feeds as Y and X
HTD 5M 15 [mm] timing belt pulleys (2:1 ratio speed reduction)
DIY HumanMachineInterface Panel.

Related videos:
FUS 200 Restoration    • UNIVERSAL MILL RESTORATION  FUS 200  
AXBBE Basics    • AXBBE Ethernet CNC Controller #1 Bas...  
Other Machine Builds    • DIY Belt Grinder  Simple and Powerful  
CNC Videos:    • CNC  

Also I'd like to give credits to:
My girlfriend and parents:
They always support and help me with my work if necessary :)

@AdamMaszynotwor This guy is sharing his knowledge including machining, DIY CNC topics etc. I'm really grateful I learned a lot of basics from him which made possible to make my first steps in the DIY CNC world.

CNCdrive.com the AXBBE controller from them is a really great choice for CNC projects. The ethernet connection of this controller to the PC is really immune to electric noise made by AC drives like the VFD etc. It makes the machine to be really stable when it comes to the control software and hardware. Now I'm using the UCCNC which I find really great all the configurations seems to be simple including the manuals.

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Music:
Brandenburg Concerto No41 BWV1049 Classical Whimsical Kevin MacLeod
Hero's Theme Twin Musicom
Intermission Tenebrous Brothers Carnival Kevin MacLeod
Manic Polka Kevin MacLeod

00:00 Intro
00:34 The Project
03:06 The CNC Control Panel
13:51 Parts Machining
22:08 Machining Some More Essential Parts
29:55 Aluminium Parts Machining
38:14 Z Axis Servo Mount Surface Machining
40:02 Ball Screw Ends Machining
41:32 The Y Axis
46:36 The X/Z Axis
55:51 The Spindle Encoder
57:28 Limit Switches
1:01:19 The Control Box
1:08:04 The Overview
1:08:35 First Tests
1:09:51 Machining Mt. Everest
1:11:51 Rigid Tapping Test
1:12:25 Final Test