We have now produced our Kickstarter keychain rewards. There might be some slight modifications for future sale, but we are happy to provide our wonderful backers with full metal keychains.
Of the many firsts for the shop and Project, perhaps the one were are most proud of is breaking our first end mill. Why are we happy? We just learned some limitations involved with CNC milling, and that’ll prove to be useful in the future.
The unfortunate part of breaking the end mill mid cut was that we ended up with a slightly rough edge. But, invested in some new files and a grinding wheel to adjust the parts.
One the parts were finished, we drilled the keyring holes and chamfered the edges.
All that remained was to apply some paint to the engraved areas and sand the metal to provide a brushed aluminum finish.
We just ordered wood to build the mini coasters, and hopefully next week out test structure will be assembled. The Roller Coaster Project shirts are still being shipped and we hope to hear from our backers.
Lately we’ve been extremely busy making the Kickstarter rewards: namely the keychains. The shirts have arrived and all will be shipped this weekend. As for the mini roller coasters, they will be finished by July then sent out.
The shirts look great, and we are excited to receive feedback from our wonderful backers.
Next, we are manufacturing keychains from metal, as opposed to 3D-printed ABS plastic.
Before we could machine the stock, we had to do some repairs/change of cutting disk for out lil’ cut off saw.
From pushing down too hard during aggressive cutting, we accidentally sheared the cutting disk. Oops!
After repairing the cut off saw, we tried our hand at cutting aluminum stock. We first attempted to make the keychains from stainless steel; however, we failed numerous times and the worst resulted in throwing the Taig’s Z-column out of alignment. So, we went with some 6061 aluminum stock.
The largest obstacle we faced was trying to engrave our wonderful little logo on the aluminum stock. We have performed a few test cuts, and hopefully it’ll work out really well.
We’ve been messing around with the lil’ Taig lathe lately. One of the tools to help us achieve our roller coaster parts is a radius turner. Now we can create spherical ball joints for a wide range of motion between the cars.
After turning the excess aluminum from the rod, we used a collet to mount the piece for our next step.
It was a somewhat successful first attempt; however, we might order a more efficient radius turner from Little Machine Shop.
There will be a more updates, soon, filled with side projects. Most importantly will be a lead screw for the Taig lathe. Below is a steel cutting session that produced way more sparks than anticipated.
On a Kickstarter note, the shirts have arrived and will be shipped out to our wonderful backers this week!
The last piece of machinery, hopefully, arrived last night: the Taig Micro Lathe.
After a small required assembly, the lathe was up and running. We purchased some round aluminum stock from Home Depot to “figure out” this lil’ mechanical wonder.
We cut a small piece of stock, and began testing out the various cutting tools.
The lathe is pretty nifty in that the motor’s weight applies tension to the drive belt. The carriage will also travel in increments of 0.001″ per tick mark. It came with a self centering three jaw chuck, but we sprung a little more to get more accurate collets. Our next test will be to test the drill chuck to drill center holes.
In the past few weeks, The Roller Coaster Project has been contacted by the good folks with The Atlanta Maker Faire. Unbeknownst to us, they have been following our roller coaster saga and were curious if we would want to show off the lil’ coaster this October to some of the most creative Atlanta has to offer.
Initially, we thought this to be a great idea and tremendous opportunity. However, if we decide to display this gargantuan feat of miniature scale, then we will have an exacting deadline in place.
In the coming weeks, we will be wrapping up our Kickstarter rewards and shipping them out. Since we launched The Roller Coaster Store earlier this week, we will soon have to fulfill orders on a grand scale.
Pending the success of our mini roller coaster reward, we will offer it and custom designed rides in our store. Also, if our mini ride is successful, then we will definitely sign up for the Atlanta Maker Faire.
The real question is: are we brave enough to lower the lap bar and go for the ride? Currently, we are standing at the entrance evaluating our options. But, we will hopefully come to our senses and go for a ride.
Since the success of our Kickstarter campaign, we have wanted to provide you guys with some Roller Coaster gear. Our Roller Coaster Store will be updated periodically with various Project keepsakes and mini coaster parts.
Coming soon, there will be a mini ride for purchase.
As the Kickstarter rewards begin to roll out smoothly, we decided to pay homage to our backers. The people listed below will forever be a part of The Roller Coaster Project, and we can not thank each and every one of them enough.
Aluminum work continued…
We are working diligently on finishing our first aluminum roller coaster car. We have had a few failures, and some successes. However, we are making great strides towards producing aesthetically beautiful and fully functional metal cars.
One new tool bit we tried was a “fly cutter.” This type of drill bit for our Taig CNC mill produces a smooth mirror finish on metal parts. Our first run with this new tool failed miserably.
After chatting with Dan DeArmond of DeArmond Tool in Texas, he offered a few tips and tricks to produce a consistent and successful part.
Also, we ordered a new Precision Toolmaker’s Vise. This heavy steel milling vise allows for great holding and precision. This vise along with new drill bits and end mills will produce our aluminum roller coaster car in no time. We will be pushing our milling and trial videos heavily in the coming day on our “Coaster Log” page that links to our YouTube channel. Thank you following, and coast on…
We have been messing around with the Taig CNC mill for a few weeks, now. Last night, however, we created a perfect aluminum coaster car frame.
After squaring the aluminum stock, or making all sides flat, we used an end mill to cut away the excess arterial. We tried this a few ways the previous night, but there was too much human error, despite the beautiful appearance.
The problem present in this part is that some of the dimensions are uneven. The human error can be attributed to zeroing the machine multiple times. So, we tried to minimize the human effects and let the CNC do its thing.
After checking the part post machining with a caliper, we found that the measurements are exact to those of the design. Since we refrained from rotating and rezeroing the metal, we were bound to only the minimal error in the CNC mill.