Ice Deposition at McGill University

ebarnett - Posted on 16 March 2010

At McGill University, we are researching rapid prototyping with ice as the build material. We have modified a Fab@Home Model 1 in several ways so that it can be used to deposit water. These changes include:

(1) The replacement of the syringe assembly with a valve/nozzle deposition system

(2) The installation of a temperature-controlled heating system for the water delivery lines and the valve/nozzle

(3) Lubrication of the lead screws and some other components with PTFE grease, which is more suitable for the -20C environment of our freezer

(4) Installation of the system electronics outside the freezer to ensure more reliable operation

Below, you can see a close-up of our deposition tool, along with the modified Fab@Home with some parts we have built. For more information, please visit our website.

The precision depends on 70-453 the material being used because for very viscous materials, a larger diameter nozzle must be used. For a material like silicone rubber, the Model 1 can reliably deposit 70-448 dumps 250 micrometer (0.25mm) diameter strands of material. We have not yet measured the accuracy with which complete parts can be made, as 70-433 braindump this depends on the size and shape of the part, as well as the material being used. I would estimate the accuracy for silicone parts at +/- 500 micrometers. The Model 1 has a positioning resolution of 15 micrometers.mcse dumps

brettlee smith