Sigma Labs Inc (SASI)

[fishticles]

When we draw parallels to traditional CNC machines and the closed-loop feedback systems that have been developed in the past, we can further see how Sigma's IPQA is just on a different level than other process monitoring software/hardware. The closed-loop feedback systems of CNC machines relied solely on optical sensors to detect following errors and adjust accordingly. This makes sense because it analyzes the motor's movement and speed. However, the process for additive manufacturing is very much different and requires analysis and adjustment according to additional parameters (thermal and acoustic) for obvious reasons.

IMO, this closed-loop feedback system is integral to the adoption of additive manufacturing (metal and plastic) as a legitimate manufacturing process. It would simply be inefficient otherwise.

Finally, I would like to capitalize on the point that Sigma currently has a patent on this IPQA involving optical, thermal, and acoustic sensors. Cola & Co are smart and two steps ahead of our competition.

article for reference: http://blog.cnccookbook.com/2014/01/27/ultimate-cnc-mini-mill-steppers-servos-closed-loop-open-loop/