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They control it using the audio card...... that just says to me that the programmer doesn't understand comms protocols.....

I am no expert in this field but from what i have seen in the physics labs in university precise mirror controlling is pretty expensive. Don't know if this is the ideal solution but it is a cheap one. Better mirrors and software (this is the part where most of the funding goes) could improve the quality significantly. But yeah, still very sceptical.

But in the end this printer is not build for precision, it is build for being affordable.
