Ran into this a few days ago. https://www.anninrobotics.com/ It's fully open source with the usual disclaimer that one can build it for fun or education but can't make them to resell. Yeah right… https://www.aliexpress.com/item/1005003688277794.html The AR3 version used a Teensy 3.5 with the trajectory calculations done on the PC and strings of co-ordinates sent out to the Teensy for the step/dir and encoder feedback. The AR4 upgraded to the Teensy 4.1 and moved all the trajectory planning into the module itself. Although I've registered on his website to get into the forum so far no word. The videos also seem to be about 11 months old. Maybe the Aliexpress version isn't pirated but just production and he's abandoned the support for open source. Anyway, there have been discussions that LCNC does this sort of thing quite well. I'm wondering if it's worth the effort to change over. The PC program for teaching and running programs is pretty impressive. At least to me. Comments? Thanks John
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