Sigma Labs Inc (SASI)

[alanthill]

From Conceptlaser's web site a description of their quality control systems for additive manufacturing:

QM modules for continuous monitoring of the LaserCUSING® process

When it comes to manufacturing components for the medical industry, a quality-controlled fabrication process is an absolute requirement
for the series production and use of components. For this reason, our development team has focussed intensively on expanding the process
monitoring systems which have been used to date. The expansion and bundling into individual quality management (QM) modules makes it
possible to ensure and document optimum component quality.



QM meltpool
The melt pool module provides monitoring of the melt pool in real time. The construction process is ?monitored
here directly as events actually happen at the microscopic level with several thousand scans a second. The data
is documented and evaluated by the machine software.



QM laser
Laser energy is the central tool used in the metal laser melting process. The prerequisite for ensuring a good
component quality is therefore to maintain the specified laser power. The QM laser module continuously
documents the power which is emitted by the laser system during the construction process.



QM powder
The metal powder is the raw material for all LaserCUSING® components. This is why the quality control and
maintenance of powder quality is particularly important. The first step in the quality assurance chain is analysis
of the powder material in house at our company after it is delivered.
The second continuous stage which can be used in the quality assurance chain is the QM powder module
powder screening station, which is separate from the process. The automatic screening station is a prerequisite
for ensuring a constant powder quality across subsequent screening processes.



QM atmosphere
In the process gas module redundant monitoring and regulation of the oxygen concentration in the process
chamber takes place.



QM documentation
The documentation module produces a clear report for all data from the quality management modules
described previously.