Samthetechie log

see Work Log for howto.

Sat, May 25, 2013

• Discussed FEA / Analysis with User:Marcin
• Useful Resources on FEA (Finite Element Analysis):
• 2.092 Finite Element Analysis of Solids and Fluids I
• 2.094 Finite Element Analysis of Solids and Fluids II
• Matlab FEA Software
• Sketchup FEA Plugin Demo Video
• Solidworks FEA
• Discussion about the plugin on sketchucation.com/forums Frame3DD Sketchup Interface

Note in the discussion that the modelling is done with 1" x 1" by 2mm thick SHS (Square Hollow Section). It is quite likely that the modelling parameters can be altered to allow analysis of 4" x 4" by 1/2" thick SHS:

• Frame 3dd Sourceforge Project
• Example arrangement of mounting the File:Reinforced Backhoe With Articulated Pivot.skp onto the File:3DLifeTrac.skp. Here is the result: File:3DLifeTracAndBackhoe.skp

• Evolved the previous design to reinforce by stacking plates: File:Reinforced Backhoe With Articulated Pivot.skp

• This is just a first thoughts / assembly of parts into one document: File:Backhoe With Articulated Pivot.skp Having watched Backhoe Concept video from User:Marcin I will heavily edit / evolve this model:

• This model is just an example assembly to start to see how it would take shape: File:Backhoe With Articulated Pivot.skp, final model will go here File:Backhoe Articulated Pivot.skp
• Evolving articulated pivot design based on CAD / images found at , GrabCAD_Backhoe_Redesign_for_Fabrication, , GrabCAD:lifetrac-backhoe, GrabCAD lifetrac-backhoe winner and mainly Backhoe Concept video from User:Marcin

• Wrote a quick guide for Sketchup_on_Linux
• Note: quick way to grab all the .skp files that have been uploaded onto the wiki.

Go to Special:ListFiles&limit=500&ilsearch=.skp and then using the down them all plugin for firefox and 'fast filtering' with /(.skp)$/

• Some notes on edge alignment in sketchup that I found useful today:

 "A second method for ensuring your edges are aligned to axes is to temporarily change the colors of your 
 edges to reflect their alignment to one of the axis. To change edge colors to reflect axes colors."

• Reviewing recent wiki changes and latest pages relating to the Backhoe:
  • OSE-OSHW-Dev-Backhoe
  • Brian_Log
  • Marcin_Log
  • Backhoe_Boom_in_Sketchup was last updated on 06:19, 18 May 2013‎ by User:Marcin so it is out of date.
  • Backhoe Prior Art - Marcin
  • Backhoe_Stick_and_Boom_Concept_Specification#Response - points 1-3 of this response were addressed by editing the components, points 4-6 can be addressed by creating models sub-assemblies and assemblies today.
  • Backhoe_Development_Brief - looks like a todo list for today
  • Backhoe_Pivot_Module_Academy - new page, no content yet.

Tues, May 21, 2013

Input

• File:Stock Pivot Plate.skp
• Feedback from User:Marcin about File:Backhoe.skp

To generate a CAM file for 3D printing, one must consider the 3" tubing and print out a 3" hole, not a 4.875" hole and ensure hole is correct for 3d printed files.

• New pivot plate File:Stock Pivot Plate 3 inch hole.skp should address feedback from User:Marcin about the 3" pivot hole?

Is the spacing / layout ok? If so I will update the rest of the models accordingly.

Note: the above is used to generate a CAM file for 3D printing, one must consider the 3" tubing and print out a 3" hole

Ouput

• Updated File:Backhoe.skp with new 'mouse ear' Stock_Pivot_Plate
• File:12 foot stock 4 inch square tube with half inch walls.skp
  • 
• File:11 foot stock 4 inch square tube with half inch walls.skp
• File:10 foot stock 4 inch square tube with half inch walls.skp
• File:9 foot stock 4 inch square tube with half inch walls.skp
• File:8 foot stock 4 inch square tube with half inch walls.skp
• File:7 foot stock 4 inch square tube with half inch walls.skp
• File:6 foot stock 4 inch square tube with half inch walls.skp
• File:5 foot stock 4 inch square tube with half inch walls.skp
• File:4 foot stock 4 inch square tube with half inch walls.skp
• File:3 foot stock 4 inch square tube with half inch walls.skp
• File:2 foot stock 4 inch square tube with half inch walls.skp
• File:1 foot stock 4 inch square tube with half inch walls.skp

Sat, May 18, 2013

• Progress on 18th: Working on sketchup models for OSE-OSHW-Dev-Backhoe

Input

• • explanation and orientation from marcin about the Backhoe.
  • shown key documents/resources:
    • Backhoe dev page: OSE-OSHW-Dev-Backhoe
    • Backhoe sketchup models in a zip file: Backhoe_Boom_in_Sketchup (my starting point for the day in terms of sketchup source files).
    • Backhoe Prior Art

Output

• File:Stock Pivot Plate.skp

• File:Stock Bonding Plate 8 inches x 16 inches.skp
• File:Stock Spacer Plate 8 inches x 8 inches.skp
• File:Backhoe.skp
  • note 5/21/13 - needs updating to mickey mouse. DONE see new upload to File:Backhoe.skp (note the 4.875" pivot hole is still present)

• • note 5/21/13 - then to 3" pivot hole for rapid prototyping / 3d printing rather than 4.875" as per explanation on Stock_Pivot_Plate