Converting an “old” manual milling machine into Cnc machine
Retrofitting my Old Russian manual milling machine to CNC.
A Conversion project of a large metalworking machine including the upgrade form old to ballscrew spindels.
The basis of my conversion project I chose a MC-51 Lugansk manual milling machine.
A heavy manual milling machine from the Ukraine and very well built, and in my case a favorable basis for the conversion and upgrade.
The basic acme thread spindels of the machines where very crude, and useless for my CNC needs and required accuracy.
The acme thread Leadscrews had an brass locknuts for (somewhat) limited backlash.
I’ve changed them for quality ballscrews spindels, that came from an old CNC grinder.
The ballscrews are now directly controlled by stepper motors with a torque of 12 NM.
The machine is also upgraded with a Z-axis that runs on Hiwin HGW25CC linear guides.
The millinghead is mounted on the hiwin linear guides.
The X axis and Y axis are equipped with new ball screws with a diameter of 30mm and lubrication of the guides.
The drive of the milling head has been replaced by a direct drive, making use of a 1.5 Kw tecknomotor 12000 / 18000 rpm.
The machine achieves a speed of 6000 rpm and a maximum speed of 600mm/min on the table.
The machine and all the extra parts I bought secondhand.
All metalworking operations where performed by a Vario Option BF 20L, and that was a challenge for the small metalworking machine
It was the biggest project I’ve done with this machine from china.
The BF20 has had a hard time ….. and is now used for manual use only.
Machines produce the components of larger and more accurate CNC machines, a form of technical evolution of the machine itself.
The total construction time was about 5 months. until now ..