The plotter uses a coreXY arrangement, powered by 28BYJ-48 stepper motors, which he overdrives with +12 VDC to increase the torque. Pen up and down control is done using a stepper motor salvaged ...

This gave instant success and should provide a valid technique for more than just this ALPS mechanism. If you haven’t got a classic plotter to hand, never fear. You can have a go at making your own.

A tech showcase in Kerala features an innovative device. Ajay H, an engineering graduate, created it. The device converts ...