This log includes major upgrades included in the current system.Till now we had been using an older OS incompatible with RPi 3 since the display could have only worked with that image. Additionally it caused the trouble where the onboard or external...
Earlier version of the device was reconsidered in terms of following aspects:• Accommodating for different refractive errors • Aesthetics • Ergonomics • Weight distribution OIO ASSEMBLY EXPLODED ASSEMBLY1. ACCOMMODATING FOR DIFFERENT REFRACTIVE ERRORS...
7/29/2013: As I stated; been working on the cabinet for the Mirror universe project. I bought a couple of "project" Bally Star Treks from a fellow pinball collector out of Shertz a few years ago. These have been setting in storage for a while... and...
Today I managed to test the motor after tightening the belts considerably so they wouldn't skip teeth. I had to hammer the pulley on the shaft to get the higher tension, so an adjustable idler pulley on each belt may may more sense in the future....
This is retroactive notes, based on memory of this project Here is an early test (april 2019) done with the gear changer. At that point I presumed a single axis could hold the gears, but there was too much play up/down so the later design holds the gears...
Then came board pliers MK 3, featuring bigger grip teeth, a handle ratchet, more aggressive slider ratchet, more curves to aid cleaning, a handle extension to clamp onto a stand, 5mm thick pieces. The ironing process yielded a marble like finish on...
Designing parts to fit perfectly together is hard. Whether it's the coarseness of our fabrication tools or that of the vendor selling us these parts, nothing is perfect. Engineering has cute word for it: tolerances. Maybe it's me: "I can drill that hole...
In order to stick to my design goal of an AUD$1000 budget I decided to start a bill of materials spreadsheet. This would be a handy tool to keep track of budget and also allow me to show people if they wanted to try making something similar. Below is...
Okay the second version of the Escape Wheel was better than the first, but still was not a complete success. This time it was not possible to adjust the pallets to prevent the escape wheel from free running, or jamming. And of course that means that...
Well, since I screwed-up posting my "completed" systems design document on Sept. 28, I've decided to run amok, and present a visceral, kick'em-in-the ... uh ... teeth! ... yea, teeth! ... video as a response to the "promotional" video requirement for...
I used FreeCAD to make all of the 3D designs. I primarily used the Part Design, Part and Mesh workbenches. My workflow was to make sketches, and pad, pocket or revolve in Part Design, then move to Part for boolean operations (for interlocking parts),...
The 1st etch with PLA pliers was successful in that it was a lot easier to massage a large board, but unsuccessful in that there were still air bubbles & the pliers absorbed acid between the laminations. The acid leached up to the handle through capillary...
This is based on the design of a strain wave gear, but it not an exact copy of a strain wave gear. Strain wave gears characteristically have an oval wave generator, a flex spline cup, and a circular spline. The wave generator engages 1/3 or more of the...
After designing our main control box through the website "boxes.py," we assembled it through the laser-cutter computer, positioning each cut-out to make the most efficient cuts. We made sure to allow a bit of room between each piece, just in case the...
Alright, a tiny bit more research...This is a good resource:http://www.allaboutcircuits.com/textbook/alternating-current/chpt-13/stepper-motors/Here's a "Hybrid Stepper Motor" (simplified), (from that page):(simplified, further:)"Hybrid stepper motors"...