ENGR242 MiniMech project: Difference between revisions

Revision as of 23:56, 7 February 2018

Assignment

Download files for the PASCO test coupon from the Open Science Framework (click on the one you want and then click "download") You only need 2 stl files (rounded and vertical) and one ini file.

1. The .curaprofile is a slicing profile that you can start with. The provided .curaprofile contains all parameter settings for getting a good quality slice file. I have intentionally left layer thickness, print temperature, print speed, flow % blank. These are the variables you can play with. This .curaprofile is to be used for all specimens. Note: Loading the .ini file provide will REMOVE the current profile in Cura. Please save your standard default profile before loading. If you happen to lose the profile, you can reload it from an old .gcode file without trouble.

Choose your optimal print settings (e.g. what you think gives you the best looking part and max strength) and then using PLA from any vendor you like print:
1. 3X small horizontal rounded, and
2. 3X small vertical
- Note: Parts must conform to dimensional specifications as indicated on right to be acceptable per ASTM D628-14 Type IV.
Put your specimens in a bag with your name and course labelled on/in the bag
Input your variable parameters with your name to the course data spread sheet in a single line here
Test your samples for tension in the Engineering Lab and record your max tensile strength (just before rupture) as well as strain (elongation) at that max strength for each of your 6 samples. Record that on the spreadsheet here as well.
Post your best stress strain curve (output from the tester) on your Appropedia page as well as your analysis, revised hypotheses and conclusions

Having Trouble?

Basic inputs to start with:

Layer Thickness: 0.2mm
Temperature: 210C
Flow: 100%
Speed: 80mm/s
Bed Temp: N/A unless you have a heated bed then put it in the comments

Make sure the horizontal ones are printing flat and the vertical one prints on the circle (see image below).

@@ Line 3: / Line 3: @@
 ==Assignment==
 [[image:mini-tensile-diagram.png|right]]
-# Download files from the [https://osf.io/gcbdj/ Open Science Framework] (click on the one you want and then click "download") Ideally you only need 3 amf files and one ini file.
+# Download files for the '''PASCO''' test coupon from the [https://osf.io/ur7un/ Open Science Framework] (click on the one you want and then click "download") You only need 2 stl files (rounded and vertical) and one ini file.
-## The .amf holds positional coordinates and rotational coordinates for any imported .stl file(s). Thus, you should "Load model file..." and print in the orientation and qty. as opened. This is critical as we already know these orientations work.
-## The .ini is the profile. The provided .ini contains all parameter settings for getting a good quality slice file. We have intentionally left '''layer thickness, print temperature, print speed, flow %, and bed temperature'''  blank. These are the variables you can play with. This .ini is to be used for all specimens - it has already been shown to work on 3 deltas. <font color="red">'''Note: Loading the .ini file provide will REMOVE the current profile in Cura. Please save your standard default profile before loading.''' If you happen to lose the profile, you can reload it from an old .gcode file without trouble.</font>
+## The .curaprofile is a slicing profile that you can start with. The provided .curaprofile contains all parameter settings for getting a good quality slice file. I have intentionally left '''layer thickness, print temperature, print speed, flow %'''  blank. These are the variables you can play with. This .curaprofile is to be used for all specimens. <font color="red">'''Note: Loading the .ini file provide will REMOVE the current profile in Cura. Please save your standard default profile before loading.''' If you happen to lose the profile, you can reload it from an old .gcode file without trouble.</font>
-## If for some reason the .amf's does not work the .STL files are attached. if you use this instead - make sure to comment it.
 # Choose your optimal print settings (e.g. what you think gives you the best looking part and max strength) and then using PLA from any vendor you like print:
-## 3X large horizontal,
+## 3X small horizontal rounded, and
-## 3X small horizontal, and
 ## 3X small vertical
-#*Note: Parts must conform to dimensional specifications as indicated on right to be acceptable per ASTM D628-14 Type I and IV.
+#*Note: Parts must conform to dimensional specifications as indicated on right to be acceptable per ASTM D628-14 Type IV.
 # Put your specimens in a bag with your name and course labelled on/in the bag
-# Input your variable parameters with your name to the course data spread sheet in a single line [https://docs.google.com/spreadsheets/d/15pa9z5r98InNpCPUGk23H3VEUHg3-xqoaqjcyzMn3UU/edit?usp=sharing here]
+# Input your variable parameters with your name to the course data spread sheet in a single line [https://docs.google.com/spreadsheets/d/1qv0wUorCnyX8hHGvGdcFZjMqM2WhbFmDQMp9srSK6oQ/edit#gid=0 '''here''']
+# Test your samples for tension in the Engineering Lab and record your max tensile strength (just before rupture) as well as strain (elongation) at that max strength for each of your 6 samples.  Record that on the spreadsheet [https://docs.google.com/spreadsheets/d/1qv0wUorCnyX8hHGvGdcFZjMqM2WhbFmDQMp9srSK6oQ/edit#gid=0 '''here'''] as well.
+# Post your best stress strain curve (output from the tester) on your Appropedia page as well as your analysis, revised hypotheses and conclusions
 ===Having Trouble?===
 Basic inputs to start with:
 * Layer Thickness: 0.2mm
-* Temperature: 175C
+* Temperature: 210C
 * Flow: 100%
 * Speed: 80mm/s