Geocaching is a great outdoor hobby and pastime where players ‘hide and seek’ a hidden cache using a hand held GPS. The locations are often very well hidden to make them difficult to find, especially if you are not looking for them. In this case the cache was located in a flower bed and there was concern that cachers looking under rocks would soon damage the flower bed at this commerical building, so it was decided to make it obvious which rock to search under.
The plaque is made from half inch thick Corian, V-Carved to a depth of almost 0.4 inches. The resulting product was then painted to match the logo and affixed to the rock with silicone.
For more information about Geocaching see geocaching.com. The Geocaching Logo is a registered trademark of Groundspeak, Inc. Used with permission. Note that items with this geocaching logo are not available for sale due to copyright restrictions.
The Nines Clock – each position on the clock face is made up of three nines in a mathematical formula. This particular custom made for a high school math classroom. The face is 10 inches square and made of black on white engraving material backed with 1/4 inch MDF. The clock mechanism is a continuous sweep model which means when the room is quiet and all you hear is the sweat dripping from the student’s brow onto the floor, there is no click-click-click coming from this clock. The frame is walnut.
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A customer needed a machined shim was to fit between a stamped metal plate and the side of a melamine desk. The customer supplied the dimensions of the metal plate in DXF format, and a plastic shim was created to the exact size required. Note the recesses near the holes – this allows the shim to sit flush where the metal plate protrudes.
The new ShopBot CNC machine at WeDoClosets.ca came with an 8 spindle drill head on a second Z-axis. The motor turns all 8 spindles all the time, and the individual spindles are extended using air pressure. Each spindle can be individually extended or retracted when 24 volts is applied to any combination of the pneumatic solenoid valves.
The ShopBot controller can operate the solenoid valves, but there are not enough outputs available to address each spindle individually.
The four analog outputs from the ShopBot controller are being used to pass a binary number) from the design software to the Logic Controller. The Logic Controller takes the number and decodes it into one of 16 analogue signals using a SparkFun Digital/Analog MUX. Each of the sixteen analogue outputs break out into a pattern of drills extending, so output 3 might translate to “extend drills 1,3 and 5”. Diodes are used to keep the signals from one drilling pattern activating other drills through common wires. The signals activate 24 vdc relays which in turn activate the solenoids to extend the drills.