thundercamel wrote: ↑
Nov 19 2018 11:48am
I like the Lazy Susan as a starting point. Nice work
That was a fortuitous discovery. I started out trying to design a pivot mechanism from scratch, went browsing on McMaster-Carr
for bearing ideas, saw a bunch of very expensive and heavy slewing bearings
and then stumbled across this $20 solution on Amazon
. It makes these weirdly brittle chips when I drill it so it's not the 6061 alloy I'm used to. I'm rolling the dice here that it will hold up over time.
Tolt wrote: ↑
Nov 19 2018 12:12pm
You've got a lot of nice, custom aluminum parts on your builds -- and a tiny shop (as do I). Are you doing the machining yourself? What machine tools do you have?
Good question. My workshop is a one car garage. I watch a lot of YouTube machining videos but I've never used a lathe, mill or anything CNC. I've looked into becoming a member at one of my local maker spaces to get access to some fun toys but never quite got around to it. I've been able to drill, cut, shape and polish aluminum mostly using a few low-tech low-budget woodworking tools and a lot of pig-headed perseverance.
Right to left:
- Drill press (donated) with a 6" cross-slide vise ($75 at Harbor Freight*). You can do a lot with a drill press and a wide assortment of drilling and cutting bits. Step bits are your friend.
- Band saw ($130 at Home Depot). This is a woodworking tool but it cuts aluminum with ease.
- 4" disc sander ($75 at Harbor Freight*)
- 1" belt sander ($53 at Harbor Freight*)
- 8" (200mm) digital calipers ($54 on Amazon)
- The purple rectangle in the center is a sheet of sand paper glued to a piece of MDF with spray adhesive. Very effective for polishing and shaping small parts.
- The perforated white tabletop under that is a home-made downdraft table. Attach the shop vac to the box under the table and sanding particles go down instead of covering the entire shop. Pretty sweet for nasty fine particles like carbon fiber.
* Harbor Freight has huge sales and crazy coupons so I actually paid significantly less for most of these. Also, I got these years ago.
I usually start by taking a few measurements, make a rough drawing in SketchUp, print out a 1:1 scale paper copy, stick that to some aluminum stock with spray adhesive and start removing material. A lot of my problem solving happens during the machining phase so it's nice to be able to make changes on the fly which might not be so easy in a CAD/CAM workflow without starting over.
Pro tip: You can import McMaster-Carr 3D components directly into Fusion 360
right within the interface. If you use Fusion 360 and haven't used this feature it will change your life.
SWB recumbent, Grin all-axle hub (5T in 20" wheel), Phaserunner, 6x LiGo battery, 330 watt sun-tracking solar trailer with 3 Genasun MPPT boost controllers (in progress), CA3 (SolarAnalyst firmware), GPS Analogger, Rohloff IGH. Solar ebike build