Dorkmo Log
aug 13, 2013
http://opensourceecology.org/wiki/File:LifeTrac6_(dave)(dorkmo)4.skp.torrent
4x4 XYZ frame for mounting VW engine.
http://opensourceecology.org/wiki/Power_Cube_WS#WS.2B
july 30, 2013
http://opensourceecology.org/wiki/File:Geardownaxel5.skp.torrent
utilizing steering pivot allows for front and rear drive axles. this theoretically simplifies a geardown. could also allow for simple gear changing by moving motors and other adjustments.
http://opensourceecology.org/wiki/Bulldozer_Geardown
jun 24, 2013
Sun Jun 23, 2013
The Control Cab Control Panel needs accommodation of:
- Power connection to Power Cube (3/4") - up to 4 Power Cubeconnections - let's do this.
- Case drain to Power Cube (1/4") - need to do 4 pairs if using 4 Power Cubes independently.
- 6-spool backhoe valve - 1/2"
- 2-spool motor valve - 3/4"
- 2-spool foot pedals - 3/4"
- Totals
- [8] pairs of 3/4"
- [6] pairs of 1/2"
- [4] singles of 1/4" (just return)
File:HydraulicQAcabmanifold10intermediateuntitled.dxf
Sat Jun 22, 2013
Control panel for hydraulics:
working with chris on hose routing for trac
- 8 – ¾
- 20 – ½
- 1 male twords power cube
- valve bolt mounts to 4x4
- File:HydraulicQAcabmanifold6intermediate2B.dxf
- File:HydraulicQAcabmanifold6intermediate2A.dxf
Friday 21, 2013
Sprocket Design
How to design a sprocket - 
- source in GIMP
See also Chain Length Calculator.
Resulting Sprockets
Sprocket with hub:
Use this for cutting. This is just the hub backing plate:
Now the actual sprocket for cutting:
Lathe Work
possible motor for lathe surplus center
doing a draft with motor mount and threaded rods that tighten to base with some pieces that can c-clamp to base.
Thursday 20, 2013
drew a rough sketchup of the lathe. going to redo motor mount. File:Lathe1.skp
found this sprocket openscad thing on thingiverse http://www.thingiverse.com/thing:7918
Tue Jun 18, 2013
Download DXFs of the 6 parts here - these are 6.26 bolt spacing for these bearings - and DXFs have been corrected for 3/4" bolt holes, meaning 3/4" + 1/16" for CNC torch allowance. File:GeardownDXF.zip
- went back to the basics and cut out intermedate shaft and using a quick attach module style mount.
- requires very large sprocket to achieve desired ratio
- need to change chain cover to accomidate flange bearing bolts sticking through.
DXF Files of Component Plates for Simple Geardown
Sat Jun 15, 2013
See also Geardown Concept. Download folder of Sketchup files- [1]
added some detail
- bolts for flange bearings
- had to shift some things around to account for tighter space
- added QD bushing for 1-7/8
- changed a couple mounting bolts to frame
June 8, 2013
Needs discussion of how size can be made more compact.
https://docs.google.com/file/d/0BwxMMqGvwTM-RjJxVGNUVm90aVU/edit?usp=sharing
added to the model a mount style with QA facing opposite direction from before
- shortened distance the 2-15/16 bearing hangs out
cleaned up some of the mounting and case holes
- not sure about where the best places are to have mount holes
June 7, 2013
https://docs.google.com/file/d/0BwxMMqGvwTM-N1piZlVIaGtqUXc/edit?usp=sharing
started modeling the chain and sprockets.
- looking for collisions
- taking up as much slack of chain in design as possible
June 1, 2013
Design Sprint - Dozer Geardown