How to Draw Watermelon House with 3D PEN for Pet Rat In today's video you will learn how to draw amazing watermelon house for ...

It’s a simple robot that drags a pen around to draw on paper ... The stepper motors drive the wheels via cogged belts, with the 3D-printed rims fitted with square rubber drive belts used ...

The 3D pen was indeed able to create a strangely-shaped ... a plastic part of any complexity whatsoever seemed to be to draw sections flat, build them up in layers, then use the pen to weld ...