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LifeTrac6.skp

LifeTrac 6 Modules

Tue Aug 13, 2013

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Aug 9 2012

• Determined that sketchyphysics in sketchup cannot be used for constraints. Or maybe it can...

File:Wranglerdown.skp

Original Download: http://sketchup.google.com/3dwarehouse/details?mid=28486f6c46da2e47107ec7adee65003d

Aug 8 2013

• Created a set of build instructions for the "Material Awareness exercise"
• Built the "Material Awareness structure"
  • Observations:
    • Material is much bigger and heavier than you would think from the sketchup model
    • Assembly works best if nothing is tightened down until entire structure is assembled
• Disassembled structure
• Did inventory of 1" bolts and nuts.
• Did inventory of hydraulic hoses

Aug 7 2013

Search "Brake valves to control hydraulic motors with over-running loads"

http://hydraulicspneumatics.com/other-technologies/book-2-chapter-12-fluid-motor-circuits

Information on Overcenter Valves:

http://www.designworldonline.com/overcenter-valves-are-key-to-hydraulic-control/#_

Interactive video on how hydraulic brake valves work

http://www.wisc-online.com/objects/ViewObject.aspx?ID=HYP3707

We need either a drum brake system or a hydraulic brake valve.

Our current Drum: http://www.surpluscenter.com/item.asp?catname=hydraulic&item=9-9003

Options for drum brake:

Fits our drum, but costs $560 : http://www.jegs.com/i/Currie/272/96226/10002/-1?parentProductId=756792

Does not fit, but demonstrates that there may less costly options: http://www.surpluscenter.com/item.asp?item=28-1324&catname=

Options for hydraulic brake valve:

Still need to determine price and circuit : http://www.hydrotech-bg.com/common/d_images/src/file/PDF/E4-ACCESSORIES.pdf - See Overcenter valves with brake control

Aug 6 2013

Brake Research Discusses several brake systems, their advantages and disadvantages, as well as how to trouble shoot them.
There are two commonly used types of brakes. Drum-Brakes, and Disk-Brakes.

This is the motor we have: http://www.surpluscenter.com/item.asp?item=9-10419&catname=hydraulic

This motor would have been better I think: http://www.surpluscenter.com/item.asp?item=9-7703&catname=hydraulic

Aug 2 2013

Crowd sourced CAD model Database - models can be downloaded in many formats

Aug 1 2013

Winner of FANG 1 challange

http://news.vanderbilt.edu/2013/07/amateur-inventors/

http://cps-vo.org/group/avm/meta