I designed a new head for the seXY Machine to raise and lower a pen or stylus, under software command.
My friend, Doug Commons (a real electronics whiz), built a new controller board for the seXY Machine that runs GRBL software so that the machine can execute gCode directly from my CAD/CAM applications. In real English, it means that the seXY Machine can now be controlled using standard software that is widely supported by most computer-controlled design tools.
So it was time to give it a head!
The new head comprises of a modified end cheek that pockets the travel rods and a new face plate housing two brass rods and a metal-gear servo motor. These rods align with holes in a pen holder assembly to allow it to slide up and down. Two simple 6mm thick pen holders clamp the pen or stylus to the slide assembly using M3 screws.
A spring on the end of the servo horn lifts and lowers the assembly. The alignment of the servo is such that when it is in the lowered position, there is light downward pressure on the pen to keep it in contact with the drawing surface.
All of the pieces of the head were cut on my CNC machine out of 12mm and 6mm HDPE and assembled using 3mm brass rod and M3 stainless steel hardware.
Now, to do some drawing with it…