Im developing this project since january, so here are the results.

Here Its the extruder mechanism

I used an MK8 extruder with neumatic coupler, because every jam or material load the TCP move so I use it on the wrist to avoid this.

So the next step was the parameters for soldering, so on the AR4 HMI I use the TCP lineal speed at 2mm/s and 1arc/s at extruder for the speed so the results were very great

A good soldering

And ejoying a good soldering platform

Thanks @chris annin for the AR4 project, now Im developing the way to make very cool channel letters