Subsystem Build & Test
Table of Contents
Team Vision for Subsystem Level Build & Test PhaseIn summary:
- The plan for this phase was to have a basic demo complete for the 3 axis motor drive system, and have basic functionality represented from the print head.
- The cuts for the mechanical enclosure were also planned to be measured, and some of the parts fabricated.
Test Results SummaryMechanical designs were implemented to the plan. The print head, image loader board, and wave form generator were revealed to have underlying issues with the hardware. After expert analysis from Xerox is was found that the waveform generator was shorted. This explains the issues the team encountered when trying to get the print head to jet. The implementation of the motors is on schedule. Limit switches were added to aid in the functionality of the motor homing and safety. Currently, different positioning algorithms such as "home", "print", and "test" are being written.
Image Loader Board & Waveform Amplifier Chassis
Full Electrical Schematic
Risk and Problem Tracking
The end status for this phase shows the tasks that we believed could be completed.
This phase had many more tasks to complete as were attempting to individually complete each subsystem. Below are some comments on our progress.
- We are continuing to put together a mid-semester BOM to submit to Dr. Cormier for approval and purchase. Some items are still being researched and others are being assessed for their necessity (i.e amber UV film)
- We would like to assess the clear film currently on our enclosure windows to see if it will suffice for our UV bulb in hopes we can avoid the expense of buying amber film (and the decrease in aesthetics as well). We would love more feedback on the email from earlier in the week ("Two Questions - UV Films, Metallic Inks"). It would also be great if we could use the Power Puck mentioned before. I have read up some on the UV spectrum and will continue to do that.
- We ran into trouble during our subsystem review Thursday with jetting from the print head. From what I understand our EE's have the software working well now, but our current issue is with the vacuum pressure. From our last big group meeting we had it recorded that a pressure of 1-3 inches of water at the bottom of the jet stack is a typical range to shoot for, we are having trouble achieving this. We will continue to troubleshoot, but may require assistance if we can't find a solution in the next few days so that we can stay on schedule.
- We had several other points of progress that don't need to be detailed at length here, just know they included improvements to the smoothness and accuracy of the motion system, and great progress with rotary encoder mounting.