Hoverboard Grows Up, Becomes Magnetic Drill Press

If you need to drill metal in tight places, the magnetic drill press, or mag drill is your BFF. The idea here is that a drill press with an electromagnetic base can go anywhere, and even drill horizontally if need be. If you don’t need to use one often, but want one anyway, why not build one out of e-waste?

[DIY KING 00] built this mag drill starting with the motor from a hoverboard. While these three-phase brushless motors have a lot of torque to offer reuse projects like this, they’re not designed to be particularly fast.

He was able to make it about three times faster by cutting the windings apart and reconnecting them in parallel instead of series. He designed a simple PCB to neatly tie all the connections back together and added an electronic speed control (ESC) from an R/C car.

Reluctant to give up the crown, he made his own three-coil electromagnetic base, using a drill to wind magnet wire around temporary chuck-able cores. The coils are then potted in epoxy to keep out dust and drilling debris. Everything runs from two large LiPo batteries, and he can get about 15 minutes of high-torque drilling done before they’re dead. Can you feel the electromagnet pulling you past the break to check out the build and demo video?

Depending on what you’re doing, you might get away with a magnetic vise instead.

Continue reading “Hoverboard Grows Up, Becomes Magnetic Drill Press”

The Electric Vehicles Of Electromagnetic Field: The Ottermobile And The Ottercar

If you’ve followed these pages over the last few weeks, you’ll have seen an occasional series of posts featuring the comedic electric vehicle creations of the British Hacky Racers series, which will make their debut at the forthcoming Electromagnetic Field hacker camp. So far these intrepid electro-racers have come largely from the UK hackerspace and Robot Wars communities, but it was inevitable that before too long there would arrive some competition from further afield.

[Jan Henrik] and [Niklas Fauth] are a pair of prolific German hardware hackers whose work you may have seen from time to time in other fields. When they heard about Hacky Racers with barely two weeks until they were due to set off for England for EMF, they knew they had to move fast. The Ottermobile and the Ottercar are the fruits of their labours, and for vehicles knocked together in only two or three days they show an impressive degree of sophistication.

In both cases the power comes courtesy of hoverboard wheels with integrated motors. If you cast your mind back to last year’s SHA Camp in the Netherlands, our coverage had a picture of them on a motorised armchair, so this is a drive system with which they have extensive experience. The Ottercar is based upon a lengthened Kettler kids’ tricycle with the larger variant of the hoverboard motors, and unusually it sports three-wheel drive. Control for the rear pair comes from a hoverboard controller with custom firmware, while the front is supplied by a custom board. The Ottermobile meanwhile is a converted Bobby Car, with hoverboard drive. It’s an existing build that has been brought up to the Hacky Racer rules, and looks as though it could be one of the smaller Hacky Racers.

At the time of writing there is still just about enough time to create a Hacky Racer for Electromagnetic Field. Following the example set from Germany, it’s possible that the hoverboard route could be one of the simplest ways to do it.

Boxes, Form An Orderly Queue Behind The Armchair!

If you have ever been to a hacker camp, you’ll know the problem of transporting all your stuff to your hackerspace village, or to wherever you’ll be basing yourself for the duration. The car park is always too far away, whatever trolley you’ve brought along is never big enough, and the terrain you have to drag everything over feels more like the Chilkoot Trail than a city sidewalk.

[Jan Henrik] and [Niklas Fauth] have an effective solution to all your hacker camp transport woes, in the form of a motorized platform designed to carry a storage box. Underneath the platform are a pair of hoverboard motors and their controller board reflashed with a custom firmware.

You might be now looking at it and thinking “So what?”, for a single platform is handy but hardly a comprehensive transport solution. What makes this one impressive though is that it’s not a single board, instead there is a swarm of them for which they appear to have implemented some form of optical following system which is teased through the video we’ve placed below the break and with this Tweet, but not in detail yet in the wiki page. A neat train of platforms follows the lead one, transporting everything with minimum fuss. What can we say, except “We want one too!”. There is some code to be found in a GitHub repository, should you be interested in having a go for yourself.

Continue reading “Boxes, Form An Orderly Queue Behind The Armchair!”