A great video showing how to assemble and intiall strat up of the Comgrow CNC ROBO router/engraver.
Comgrow Robo CNC Review: The best first budget desktop CNC router/engraver for a beginner
The Sainsmart id not like the Comgrow but it's a great video showing how to calibrate the machine and can be used on the
Comgrow ROBO. These machines use the same software to run he machine. He shows which parameters to set and where
they are located and how to change them.
Sainsmart 3018 PROVer Cnc Tutorial with candle, grbl configuration, axes calibration and spoil board surfacing.