Posted in 3d Printer hacks, Arduino Hacks Tagged 3d printer, arduino pro mini, closed loop, closed loop control, dc motor, optical encoder, reprap, servostrap Search Never miss a hack ...

Each of these gantries is driven by closed-loop servo motors and fancy ball screws, producing a total build volume of 77″x30″x20″. This open air version is printing in PLA.

Toshiba: A three-phase brushless motor driver IC "TC78B025FTG" with a rotation speed control (closed loop control) function for small fans. (Photo: Business Wire) ...