A new load of wood arrived and time to start cutting out pieces. I got a few plans printed out at the local UPS store for a very reasonable $0.50 per square foot. Not much lasercutting to do on the Lazy Bee as it’s mostly sticks.
I’m not really sure why I built this router. At the time I had no immediate need for it. I think it was my dad’s fault. He was a master engineer/hacker/builder/pennypincher. After he died I inherited quite a few boxes of his tools, parts, uncompleted projects, junk, and memories, and it was when I kept trying to thin out these boxes, that I kept running across a few assorted little stepper motors.
At the time I was cutting out guitar bodies on the bandsaw, and knew other people who were using CNC routers to cut out Telecaster bodies and though that was pretty cool. I knew nothing about CNC, but started hanging out on the CNC Zone Forum learning about this stuff. After a while I invested $60 in a stepper control board, and decided if I could get down the process of drawing a simple circle in a CAD app, turning the circle into a list of coordinates, and then watch the motors move to those numbers, I’d start building the router. I thought it would be smarter than building the machine first then finding I was too dimwitted to get anything to move-lol. So in the past year I’ve only cut one guitar with it, but I have cut plenty of airplane parts, do-dads, geegaws, and thingamajigs with it.
Here’s some pics od it in progress and a video cutting stiffer spindle mounts.
Including PC and software, the whole thing probably cost me around $700 and a couple months to build. The router plans are at http://www.solsylva.com . The controller is a $60 Toshiba tb6560 from ebay. The major costs were 1/2″ Acme dual thread and the Acme zero-lash nuts from http://www.dumpstercnc.com and the stepper motors from http://www.hobbycnc.com .
For small to medium models, you can buy all the covering you could use in your lifetime for $23. I found the good stuff. 1.5 mil clear shrink with adhesive. Comparable to Ultracote Lite. 22 inches by 500 feet
It’s all done, the smallest RC plane I’ve built. 27 inch wingspan for indoor and backyard flying. Dirt cheap electronics, no extra weight-loss measures (ie- no carbon fiber pushrods, no cellfoam, no contest weight balsa) , 2 cell 800mA battery, 1800kv motor from my Chinese cousins at HK, towerpro 5 gram servos, 1.5mil doculam covering. CG was a bit too far back for my tastes and some shuffling is called for, but it’s a hoot to fly this little bat.
Thanks to Ron at the Probro forum for the plans. The build thread is here: http://www.theprofilebrotherhood.com/forum/viewtopic.php?f=20&t=33132
I deviated from the plans by using a NACA 0015 airfoil. I lasercut a dual-taper rib pattern from 11″ to 7.5″ chord. http://airfoiltools.com/airfoil/details?airfoil=naca0015-il If anyone wants a ribset cut let me know…. it’s already in the computer.
Some of my new favorite RC supply sites that haven’t ripped me off.