Lex Log
Oct 11, 2017
- File:CNC Torch 1in carriage.fcstd File:CNC Torch 1in carriage metal plate.fcstd - Updated all holes to be R0.155".
Oct 10, 2017
- Dev Meeting
- File:CNC Torch 1in carriage.fcstd - Changed bearing grove from 1.3" to 1.36". Increased length of long side from 5.9" to 6.0". Moved bolt holes on each end by 0.1" towards the edge.
- File:CNC Torch 1in carriage metal plate.fcstd - Plate thickness changed to 0.25". Bolt holes resized to 0.155". Bolt holes moved closer to edge to match the plastic.
Oct 9, 2017
- File:GT2 double pulley.fcstd - recreated the pulley in FreeCAD Sketcher WB from provided dimensions
Worked some more on the GT2 double pulley trying to get the belt and teeth done. Josh helped me out a lot with answering questions, etc.
I think the main issue is that I was using FreeCAD 0.17 (daily build) and it's just too buggy. Going to continue later with 0.16 and see if it's a smoother experience.
Wrote a little bit of Python code for Michel to help him with his blender part exploder.
Oct 8, 2017
- File:GT2 double pulley.fcstd - double pulley with 20 teeth, mirrored from this single version: from https://grabcad.com/library/timing-pulley-gt2-20-teeth-5mm-bore-2/details?folder_id=2369004
Oct 6, 2017
- OSE Market
- OSEDev Kit
- OSEDev Workbench
- File:CNC Torch 1in carriage.fcstd
- File:CNC Torch 1708 Motor interface.fcstd
Oct 3, 2017
July 22, 2015
Direct modeling CAD systems (SketchUp) can be made more precise and predictable by adding some facility for parameterization, this technique is called: Variational Direct Modeling
http://www.ledas.com/pdf/VariationalDirectModeling.pdf
For an even broader overview of why variational direct modeling is a way forward: Direct Modeling - Who and Why Needs It? A Review of Competitive Technologies
A potential open source direct modeling CAD application should have this feature.
July 19, 2015
Researching the implementation of an Operational Transform web based CAD system.
Purchased a copy of this paper: Operational transformation for dependency conflict resolution in real-time collaborative 3D design systems
Which discusses a few specific OT functions necessary to deal with graphs of dependent objects, essentially this resolves some issues related to multiple people editing inter-dependent parametric data at the same time and how to merge conflicting operations.
Full size "mech warrior" robots, could be re-purposed to do construction/agricultural work... http://www.megabots.com/
Also, PhD Thesis on walking robots: Robust Execution of Bipedal Walking Tasks From Biomechanical Principles