The whole mechanical system for VentCore is made of only the components shown in the exploded view.
Designing it as simple as possible was the main challenge for driving the belt to compress the BVM and to enable fast assembly. The belt mechanism contains only 6 major components:
a. A sheet metal plate – where the belt mechanism is assembled
b. 6x 3D printable parts
c. Standard size shoulder screws
d. A standard NEMA23 stepper motor (changed from NEMA17)
The bottom plate is a composite (aluminum and plastic sheet) material (in this case – Alucobond 4mm), which can be cut in a CNC machine.
The knobs for the rotary switches are 3D printable.
The Front and Back Enclosure is white acrylic sheet (5mm) that can be cut with a laser CNC machine.
The Top Enclosure is 1.5mm thick sheet metal plate.
This current version of the design contains a simple custom made electronic board, 3x rotary switches and 2x toggle switches.
All these parts can be downloaded below for more information together with BOM (Bill of Materials).