A few days ago I cut and re-welded an AV cart (Thanks, Tom!) so it can hold the 150 Lb rotary table at about the same height as the bed of the mill. The cart has an open shelf to hold the more commonly used tools and storage below for more mill related tools.
Curious about Milwaukee Makerspace Membership after attending our Open House on Saturday? Feel free to attend the weekly meeting held at our space at 3073 S. Chase Ave Building 34. The meeting starts every Tuesday evening at 7 P.M. and lasts about an hour. After the meeting all types of Making will be happening. The Milwaukee Makerspace is also open for prospective-member visits on Thursdays after 7pm on our weekly electronics night – its BYOEP (Bring your own electronics project). Please do stop by to meet the Makers! We hope to see you on an upcoming Tuesday or Thursday night!
In about 30 minutes after the Makerspace meeting on Tuesday, Ross, Jason and I made a Jacob’s Ladder from an old neon light transformer that I brought in, a couple pieces of wood, and some TIG welding aluminum filler rod.
With 110 Volts at its input, the transformer put out 9000 Volts! The arc formed across the gap, but it wasn’t actually a high enough voltage to make the arc ascend the ladder. When I hooked the transformer through a Variac and turned the knob to 130 Volts, the arc began to ascend the ladder – but only a few inches. The obvious solution was to add more voltage, so I hooked another Variac in series with the first, turning this one to 140 Vac. With the output of the transformer a bit under 12000 Volts, the arc ascended over 2 feet up the ladder. Check out the video below showing the arc’s interaction with wood.
Last Saturday morning I spent 4 hours making a Rubens Tube at the Makerspace while the crew from Pumping Station: One was shooting footage for their documentary entitled The Rebirth of the Maker Movement. Here is the first lighting of the tube:
A Rubens Tube is a pretty flashy piece of physics demo gear that uses fire to show the acoustic standing wave pattern inside an organ-pipe like tube fitted with a loudspeaker at one end. The 48” long, 2.5” diameter tube is filled with propane, which escapes through a series of 50 0.043” diameter holes spaced by 0.9 inches all along the length of the tube. Once the tube is full of propane (with absolutely no air), the 50 propane jets are lit with a striker or match, and all 50 flames have an identical height of 2 or 3 inches. When sound is played though the speaker at one end of the tube, the flame height is modulated by the acoustic pressure from the speaker. When a single tone (sine wave) at a resonance frequency of the system is played though the speaker, the heights of the flames map out the sinusoidal shape along the length of the tube. Playing music with dynamics or signing through the speaker is especially dramatic. I need to spend a few more hours fitting the Rubens Tube with a speaker at the other end and adding an additional propane inlet.
It was a banner day at the Makerspace for collaboration and organization. After watching forklift safety training materials with Sean, we drove the new forklift (Thanks, Tom!) around the open bay moving pallets around a bit. I then moved around Sean’s and my storage pallet on the racking. I restacked the lumber and extra bench tops so they were out of the way of the forklift:
The above photo shows the four newly installed pallet rack shelves I brought down from from the upstairs storage. I moved Jason’s audio gear to his very own storage pallet (Sorry!). It also shows the bench tops that Brant and Co. recently cut. I finished screwing these sections together with the new 19.2 V Cordless drill that Ben just donated to the space today. Now the bench tops won’t drop through the racking – They’re 16 feet of usable benches!
I also cleaned up the bay – moving the carbon fiber beams under the new bench tops, and moving the extra batteries, motors, pumps, gears and saw to a pallet on the new section of racking. Only the Pots of Gold and saws remain in the cleaned up bay:
After Brant, Ron and I hung the new 4′ by 4′ pegboard that Rich made, I put the second half of the tools up on the pegboard:
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