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Category Archives: CNC
LNG1 as a Parallel Kinematics Machine
For some time I’ve been wanting to build a parallel kinematics machine tool and I’ve done my homework, but nothing replaces getting your hands dirty. LNG1 is coming along slowly but its dual-drive X axis has been operational for some … Continue reading
Servo Calibration Mystery
Hello everyone, Since my last post I’ve modified Mill #2 to reinstall its old, shorter X axis so I could repair the damaged ballscrew on the new X axis but also, more immediately, so I could proceed with calibrating my … Continue reading
LNG1 AC Servo Speed Test
Following yesterday’s failure I just couldn’t let it rest, so I burned the midnight oil. I did extensive research on the internals on ballscrews. Then removed the servo from Mill #2B and then tried to turn the ballscrew by hand. … Continue reading
Sticky Ballscrew Trouble
Well, everything can’t always go perfectly. In my last post I demonstrated that my DIY CNC milling machine, upgraded with a 10mm-lead ballscrew and a 600W AC servo, could pull off linear speeds of 20 meters per minute. While that … Continue reading
My First AC Servo
Hi everyone, Today is a big “first” : I’m testing my first ever AC servo. I do use AC servos professionally, notably Harmonic Drive servos, but these are very specialized servos, usually purpose-built, always very expensive. I’ve never actually bought … Continue reading
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New Vises For M2B
Hello, it’s been a while ! The other day I found this interesting interview of Adam Savage, of Mythbusters fame. He’s a far more eloquent man than I am, so I’ll let him explain why he (and I, and people … Continue reading
LNG1 First Test Under Power
I like it when a plan comes together… 😀 A few days ago I introduced my prototype of a fully-integrated CNC machine tool controller based on a Pico-ITX mainboard running Windows or Linux. Since it is ready to go, all … Continue reading
LNG1 Nearly Ready For First Moves
So here it is… today I’ve machined the slides and motor mounts for the long axis of LNG1, and then I’ve assembled everything. It now looks like this : The stepper motors may look small for such a machine, but … Continue reading
LNG1 Assembly Progress
Yesterday I received a massive amount of the special sliding nuts for the slotted extrusion I use to make LNG1 : 700 nuts ! And each one has a bolt with its name on it. Straight out of the box … Continue reading
Antique CNC Back From The Dead
Last week-end I’ve had the pleasure to lend my skills to a Parisian hackerspace in its plan to add physical hacking to its activities. The /tmp/lab (a Linux-head haven as you can guess from the name) inherited an ancient CNC … Continue reading