Your argument is null and void, when you use the word except.
Not a traditional control board. If you want to debate semantics and tell them that they are wrong, here's a link to get started:So the "uP" GF refers to is, what, duct-taped to the inside of the cover? Pick a story and stick to it.
http://community.glowforge.com/t/skydog/1668/22
Here's an excerpt:
"The glowforge does not have a motion controller onboard
How does it move then? It may not have motion planning, but it must have stepper control of some kind inside. I can't imagine it solely has an h-bridge being controlled over the internet. Stepper control etc must be local, otherwise network latency would cause total havoc...
karaelenaRegular
Traditional motion controllers (GRBL, TinyG, Smoothie, Marlin, LinuxCNC (or MachineKit) & Mach3 all have the ability to output stepgen pulses required to move the steppers (specifically to tell the stepper drivers which direction and how long). The glowforge does not have this. The Glowforge 'cloud' create these and outputs a waveform in which the glowforge 'plays' locally."
Right. Steppers do not have feedback. It's open loop. Check out that link above.
There is no traditional onboard controller.