P17512: Xerox 3D Print Head/public/
Preliminary Detailed Design
Team Vision for Preliminary Detailed Design PhaseThe team worked to create and finalize early mock-up designs for the various subsystems and began to decide on design strategies going forward. All the documents related to this phase can be found here: Detailed Design Documents
Prototyping, Engineering Analysis, SimulationThe team ran a few tests to verify the feasibility of the X-Axis drive system, and checked the functionality of the other subsystems left by last year's team.
- Y and Z axis drives were shown to move fast enough and with enough force to satisfy our design's needs.
- A simple prototype rig of the X-Axis drive subsystem with linear encoding was implemented to verify the speed of the axis running with a linear belt drive, driven by a CompuMotor AXL 83-93 stepper motor, see pictures below:
The 2 motor tests shown above demonstrate the capabilities of the x axis drive motor with the belt system, and prove that it is fast enough to meet and exceed the engineering requirement for speed
Preliminary design summaryPreliminary designs developed during this phase and presented at the pertinent design review follow.
X-Axis Drive SubsystemThe motor driving the x axis was upgraded, and the subsystem redesigned to accommodate it.
Printing SubsystemProgress was made on redesigning the mounts and parts for the image loader board and associated support circuitry
Enclosure/Containment SubsystemThe redesign for the enclosure components was modeled, see model below:
Emergency Stop Safety SystemIt was decided that the emergency stop subsystem could consist of only a circuit breaker for simplicity, see below:
UV Ink Fume Evacuation SubsystemAll parts for the UV subsystem are on hand and easily integrated into the system overall, see pictures of the fume extractor and vent adapter below:
Print Surface Clamping SubsystemA couple of alternative schemes for securing the print surface were designed in this phase, for later fabrication:
Bill of Material (BOM)A live document containing the BOM can be found here
- Test motor control capabilities:
- Verify speed with microcontroller and linear encoder (verify speed) - DONE
- Observe symmetry of test patterns (verify step precision) - TODO
- Observe quality of lines in test pattern (verify step precision) - TODO
- Test UV ink criteria
- Test with formulations of varying viscosity
- Test curing speeds
- Test print quality (DPI)
- Test Vacuum Capability
- Determine safe levels of UV ink in the work area
- Determine how long it takes to evacuate contaminated area
- Determine optimal vacuum pressure
- Encoding Method
- Determine if rotary or linear encoding is most efficient