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Does anyone have experience running any of the stepcraft machines on a Raspberry pi or another low cost platform?
Veröffentlicht : 17/07/2015 8:44 pm
For what would you like to use the Pi? CAD, CAM or as a machine controller?
As a machine controller (the part that generates the signals for the stepper motors) the Pi is totally out of scope - at least with the default OS. In all CNC setups that run without a dedicated mikrocontroller for generating the signals, you have the problem that the timings are not 100% accurate. This is caused by tons of interrupts and unpredictable scheduling of all the running tasks/processes.
You might have a chance with Pi 2 after putting a lot of effort in stripping down the OS.
But the mass-storage might still be a problem, because a SD card can have delays in a range of several 10-100 ms.
I plan to build my own CNC controller based on the Pi as well, but the signal generation will then be done by a mikrocontroller.
SC 420 mit DIY parallel + Proxxon mit Mod + HF500 + SprintLayout + LibreCAD/QCAD + FreeCAD +WinPC starter/USB->EstlCAM + EstlCAM LPTAdapter + EstlCAM Handrad + DIY Vakuumtisch
Gruß, Andreas
Veröffentlicht : 17/07/2015 9:42 pm
Have a look at the beaglebone black - there is a realtime liinux distribution called "machinekit" ( http://blog.machinekit.io/ ).
I haven't tried it personally, but I think this matches your idea the closest...
regards
Stonie
Veröffentlicht : 19/07/2015 11:49 pm
