1986 Cortini L300 CNC Benchtop Mill Retrofit to LinuxCNC on Raspberry Pi 4

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3 жыл бұрын

I was in the process of converting a Sieg X2D mill to CNC with ballscrews when this mill arrived in the shop and took its place. I had already finished putting together the workbench and electronics enclosure built in. RasPi 4 with LinuxCNC already setup. So all I had to do was connect the stepper wires to the drivers that were already setup. Cleaning the ways and adjusting the gibs and fine tuning the accel and speed only took a couple hours.
Just a crude implementation to start. Steppers wired into some spare TB6600s I had running around 30V which seems to be about as high as I can push those with 3.0A current output without tripping the internal protections. Eventually I'll want to replace those with probably DM542s or DM556s @ 48V.
No limit switches or probes or spindle control yet, just stepper control.
Running at about 120ipm X and Y and 90ipm Z. The RasPi with drivers in single step mode seems capable of of handling up to 180ipm with the current settings but motor torque is currently the limiting factor due to the TB600's limited power. Still a very usable speed.

Пікірлер: 6

@covad7686 2 жыл бұрын

Nice!

@calphis 2 жыл бұрын

These are very stout machines. Fit on a bench top but perform like a much larger mill in terms of rigidity. I had the Sieg X2D before this and it was a good machine, but this is nearly 2x the weight and thickness of the important geometry. Also a unique design, not a "knee" mill but the whole column moves, which makes wear less of an issue.

@tjosephpowderly1066 3 жыл бұрын

Nice project, Cortini built miniature training machines. While I worked in the Ticino I saw a miniature sink edm they made. Yours is a dovetail slide? We use Felmann crossslide at AGie. Best of Luck! LinuxCNC is great.

@calphis 3 жыл бұрын

Interesting. Yes, this machine has dovetail ways. Can't say I'm familiar with Felmann crossslides. I had read a little about synthetic way coatings recently. I could maybe see myself applying something at some point, though I think the spindle speed will likely be the limiting factor in practical feed rates for most materials and I'll probably end up applying that time spent towards a larger machine.

@tjosephpowderly1066 3 жыл бұрын

@@calphis look at Turcite, old school machine slide coating ( or learn how to scrape :-).

@calphis 3 жыл бұрын

@@tjosephpowderly1066 Yeah Turcite was one I had been learning about. Doesn't seem too intimidating. Would love to learn to scrape when things slow down a bit.