Basement Wood-Drying Kiln

Once upon a time, a woodworker met another woodworker who happened to have a tree business. They struck a deal stating that the first woodworker would dry the sawn boards provided by the second and both would share the lumber. That’s exactly what happened to [Tim], which led to his entry in The Hackaday Prize.

[Tim] does a great job explaining his build of the kiln itself, his controls, and the gist of running the thing. The idea is to pull moisture out of the wood at just the right speed. Otherwise, the boards might check on the outside, honeycomb on the inside, or bear residual tension. He’s using a dehumidifier to pump dry air into the kiln and a control system to both monitor the relative humidity in the kiln and to dry the stock down to a moisture content in the 6-8% range.

kiln controlsThe kiln is built from slightly blemished pallet rack shelving that [Tim] cut to suit his needs. He skinned it with 1/2″ insulation boards sealed with aluminium tape and plans to add sheet metal to protect the insulation.

[Tim] wanted to control both a fan and the dehumidifier, monitor relative humidity in the kiln, log the data, and send it to the internets. For this, he has employed an Arduino Due, a DHT-22, an RTC, a relay board, an Ethernet shield, and an LCD to show what’s happening. The hardware is all working at this point, and the software is on its way. Check out his entry video below.


SpaceWrencherThis project is an official entry to The Hackaday Prize that sadly didn’t make the quarterfinal selection. It’s still a great project, and worthy of a Hackaday post on its own.

 

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Inkjet Transfers to Wood

Color Image on wood board

You can’t feed a piece of wood through a stock inkjet printer, and if you could it’s likely the nature of the material would result in less than optimal prints. But [Steve Ramsey] has a tutorial on inkjet transfers to wood over on his YouTube Channel which is a simple two-step method that produces great results. We really love quick tips like this. Steve explains the entire technique while creating an example project – all in under 2 minutes of video. We don’t want to get your hopes up though – this method will only work on porous absorbent surfaces like bare wood, not on PC boards. We’ve featured some great Inject PCB resist methods here in the past though.

The transfer technique is dead simple. [Steve] uses the backing from a used sheet of inkjet labels (the shiny part that normally gets thrown away). He runs the backing sheet through his inkjet printer. Since plastic coated backing sheet isn’t porous, the ink doesn’t soak in and dry. He then presses the still wet page onto a piece of wood. The wet ink is instantly absorbed into the wood. A lacquer clear coat seals the image in and really make the colors pop. We’d like to see how this method would work with other porous materials, like fabrics (though the ink probably wouldn’t survive the washing machine).

Click past the break for another example of [Steve’s] work, and two videos featuring the technique.

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A New Old Lathe for your Hackerspace or Garage

3D printers, or even small CNC routers may seem like relatively easy machine tools to obtain for your hackerspace or garage. They are both very useful, but at some point you may want to start working with round parts (or convert square-ish items into round parts). For this, there is no better tool than a lathe. You can buy a small and relatively cheap lathe off of any number of distributors, but what if you were to get a good deal on a larger lathe? Where would you even start?

In my case, I was offered a lathe by a shop that no longer had a use for it. Weighing in at 800 pounds and using 3 phase power, this South Bend Lathe might have been obtained economically, but getting it running in my garage seemed like it would be a real challenge. It definitely was, but there are a few mistakes that I’ve made that hopefully you can avoid.

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DIY Pellet Fed Boiler is Hot Stuff

pelletburner

[Firewalker] has designed a great pellet burning boiler (translated). Wood and biomass pellets have gained popularity over the last few years. While freestanding stoves are the most popular method of burning the pellets, [Firewalker] went a different route. He’s converted a boiler from what we assume was oil to pellet power. An Arduino controls the show, but don’t hold it against him. [Firewalker] is just using the Arduino as an AVR carrier board.The software is all written in C using AVR studio. The controller’s user interface is pretty simple. A two-line character based LCD provides status information, while input is via buttons. Once the system is all set up, thermostats are the final human/machine interface.

Burning pellets requires a bit of prep. A cleanup of the burn chamber must be performed before each burn. The AVR is programmed to handle this. Once the chamber is clean, new pellets are fed in via an auger system. The burner is monitored with a standard flame sensor. When the fire is up the pellets feed in until the boiler gets up to temp. Then the system enters a standby mode where it feeds in just enough pellets to maintain the flame. When the thermostats stop calling for heat, the whole system shuts down, ready for the next burn.

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Automata and wooden gears

mechanism

While most animated machines we deal with every day – everything from clocks to cars to computers – are made of metal, there is an art to creating automated objects out of wood. [Dug North] is a creator of such inventions, making automata out of wooden gears, cogs, and cams.

[Dug]’s inventions are simple compared to turbine engines, but they still retain an artistry all their own. With just simple woodworking tools, he’s able to creating moving vignettes of everyday scenes, everything from a dog barking at a bird, to Santa Claus gracefully soaring over a house on Christmas Eve.

Below, you’ll find a video of [Dug]’s creation, ‘An Unwelcome Dinner Guest’ – an automated dog barking at a wooden bird. There’s also a video of him being interviewed by the awesome people at Tested last year at the World Maker Faire.

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[Frank] builds a chair from a sequoia

chair[Frank Howarth] is a very competent woodworker known on the YouTubes for his wonderful stop-motion videos of turned wood bowls. Lately, though, he’s put some effort into building furniture, this time a beautiful lawn chair made from a gigantic sequoia log.

A few years ago, [Frank] and a friend acquired a gigantic sequoia log and milled it themselves with a chainsaw. After two summers, the huge boards were finally dry enough to be used and [Frank] decided a lawn chair would be a fine project.

The sides of the chair are a single monolithic piece of wood. Of course [Frank] needed to cut the sides in half and join them together again for the decorative holes, but it’s still an impressively solid piece of woodworking. The back and seat of the chair are also made out of the same sequoia board, cut into slats held together with three very large dowel rods.

This project probably wouldn’t be possible if it weren’t for the awesome equipment and tools [Frank] has in his shop. He has a great tour of his shop available for your viewing. We should all be so lucky.

Foot-powered lathe is a tour de force of joinery techniques

foot-powered-lathe

Meet [Quetico Chris]. He’s a master woodworker who likes to find his own alternatives to using power tools. Most recently, he was inspired by a fly-wheel from an old factory. He used it to build this foot powered wood lathe.

It works something like a foot powered sewing machine. There’s a lever for your foot which converts the downward force from your foot into a rotating force which drives the work piece. The mechanics of the lathe are pretty common, but we think the build techniques he uses are anything but. The video after the break shows each step [Chris] went through when crafting the human-power tool. His approach was to use wood as often as possible which includes foregoing modern fasteners for older joinery. He uses mortise and tenon, wood pinning, doweling, and a lot of puzzle-like tricks to get the job done.

We lack the skill and tools to replicate this kind of craftsmanship. We’re going to stick to letting a laser cutter form our wood connections.

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