Asiga MAX - Principle of Operation

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Asiga MAX User Guide

Principle of Operation

The MAX is a 3D printer which builds objects from CAD data. The objects are built from

photopolymer resins which are liquid chemicals that can be solidified by exposure to light. A

physical model is built by solidifying successive layers of photopolymer against each other.

This process is called “stereolithography”.

The MAX build process employs a unique feature which is referred to as the Smart

Positioning System (SPS). The SPS utilizes an array of position encoders which detect

when a layer of correct thickness is formed. The process works as follows:

1. The model under construction is positioned above the vat of photopolymer. The vat

bottom is made from a flexible transparent Teflon film which is supported by a glass

plate.

2. The model is moved downwards to one layer-thickness above the bottom of the vat.

The movement squeezes photopolymer resin out from the gap between the model

and the Teflon film. Viscous forces oppose the motion, resulting in mechanical

deflection of the apparatus.

3. Four position encoders at each corner of the glass plate precisely monitor the

mechanical deflection between the glass plate and the model under construction.

The process monitors the deflection until it is relieved.