Wallace
Color:	White
Extruder:	?
Temperature:	?

3D printer codename: Wallace is a unit that is currently in progress. Construction began during the 2nd week of the Spring semester (January 2014). The effort is headed by Brandon Tunkel. The design is a modification of the RepRap Wallace printer, dubbed the 3DM1. The build is slated to reach completion by the end of the Spring semester.

The decision to switch to the Wallace design was based on several advantages over the Open Hybrid Mendel printers. First off, this style of printer is intended to be as simple as possible. This is accomplished by utilizing as few parts as necessary. This results in a lower cost and assembly effort. Additionally, it allows for a more robust printer. Fewer joints and points of attachment result in fewer places for unwanted motion or "play". Secondly, the Wallace design allows for a large print volume. The nature of the design permits a large range of motion in each axial direction. The printer bed is considerably large at

Other improvements with this printer that are not exclusive to the 3DM1 design are the bowden extruder and linear bearings. This extruder type allows for less weight on the

Log

Date	Modification / Problem
12/09/2013	Thermistor is fixed temporarly by placing it under the tape
12/06/2013	Thermistor for the bed is loose and needs to be re-soldered. Currently the thermistor is under a washer on the bed, which gives a fairly accurate bed temperature reading.
12/06/2013	Extruder Gear skipping slightly
09/03/2013	X-Axis pulleys must be changed

Operating Specifications

Design	Ohm
Electronics	RAMBO 1.4
Firmware	Marlin
Extruder	0.35mm
Heated Bed	Yes, 55C

PSU Unit White - Current Condition

As of 9/15/11
As of 11/15/11
Spring 2012

Print Problems And Solutions

PROBLEM	SOLUTION
Prints were leaning to one side.	Reattached the Y-axis pulley securely.
Motors were getting very hot.	Adjusted the potentiometers so the motors had just enough power to drive the axis and run the extruder.
Tip temp. read '2511' in Repsnapper.	Reconnected thermocouple more securely.
Extruder motor gear slipping.	Super-glued gear to motor shaft.
The extruder bolt was mis-alinged so the filament was not feeding.	Adjusted the spacing of the extruder bolt with washers.