Category Archives: Drafting

journal 10-28-2015 track and model

I finished a track and ramp for my model. The mock up the stud wall and triskets deck that simulates the parameters in the Voorhees theater floor. The ramp and track are fixed relative to the opening in the deck. The track has some rough corners that bind the platform but should be fixed with some smoothing.

I have moved the track wheels from the edges of the platform to the base of a center leg positioned in the middle, much like an R2D2 leg. This improved stability by supporting the center of gravity and use a ground level ramp instead of ones that would have to be suspended.

This design version does remove the redundant support from the track and wheels and rest the load solely on the legs of the platform.

Because of the sharp angle of the ramp, the track causes the platform to lift off of its front wheels before the legs begin to elevate the platform that could pose an issue binding with the deck.

I would want to see if a shallower ramp with a smaller angle or a smaller center leg could give me more room to clear thicker deck material for more structural integrity.

 

Journal 10/22/2015 paper work

I continued to update my Auto CAD model and I started to document and capture the past versions of the model for my journal.

This is my first design, it utilizes the sunroof and cartage design. the piston that pushed the carnage forward, up a ramp would also compress a set of arms that would lift the back of the platform to be flush with the deck. The issue with this design is that it would rely solely on the strength and integrity of the piston for structural support, meaning a single point of failure could compromise the stage.

 

 

Old sunroof cap

This is the dissection of the 4 steel bar window hinge that I found in a catalog. The arms of the hinge are each have 3 points of constraint to create 1 compound axis of movement.

I wanted to extend an bar to be perpendicular and flush to the bottom of my platform. A leg extending from the  foundation to the hatch would provide significant support vertical compression and not rely on the piston for structural support when in position.

hinge cap

4 bar hinge wire frame

4 bar hinge

The next draft used the scissor lift idea but got rid of the ramp because it would not work with a single point hinge and kept inverting the platform. This design has four legs and would use cross bars to move the legs simultaneously.

scissor lift cap

This was reformed into the current design that uses a 2 part ramp to lift the stage to a preset level and then a vertical lift that moves the platform level with the deck as the legs are set into a vertical position.

axel placement cap

New slide lift track

track and frame

Fighting with open lab to publish scans is challenging.

PDF’s do not show up as images so I need to save them as images, reformat them to 16bit color, then convert them into jpeg files because bitmap and XPS are insecure formats.