The Shop > Wood & Stuff
Banjo Build
S. Heslop:
Got it back together for now. It was still acting funny but then I realised what the problem was; the crank arm was hitting the horizontal beam at the top of its travel. Helps show how strong those windscreen wiper motors are since it was flexing the whole plywood block that the motor is mounted to instead of stalling it. All that'll require is some adjusting of the yoke to fix it.
There's alot of little things here and there I could do to improve the thing too. I thought up a slightly better idea for the yoke part that i'm tempted to try, but I could get caught up in all this stuff if I let myself. If nothing else I might just update the cad model of the machine.
Looking at the video I took it looks like the thing I was trying to fix in the first place isn't aligned, it's now about as far out in the other direction. With the billions of shims I hope that trying to shift the thing parallel doesn't make the slide jam up. But hopefully it should be easier to do.
Also since this thing was about 99% fiddling I didn't record much of it. And I've neglected to take any clips of putting the shims in.
sparky961:
--- Quote from: S. Heslop on April 06, 2015, 02:54:22 PM ---I have managed to set oily rags on fire before while welding though!
--- End quote ---
A few months back I started a new job. Within the first month on two separate occasions I set a rag on fire while welding. Fortunately it was more funny than scary, but unnoticed in a home shop it could have been devastating.
S. Heslop:
Got the thing reassembled. Also put the sandpaper on with a thin layer of 5 minute epoxy. It's brittle stuff and the idea is that it should hopefully be quite strong in shear as it sands, but should peel off easily. I'll be replacing the paper when I finish sanding the drum, so I can use some finer stuff to get a smoother finish. So i'll find out if this idea works then.
Not sure if I'll call this whole thing a success though. All I really did was broke everything and fumbled about for a week trying to get it back together. It's still out of alignment and I could try fixing that but... I don't want to end up stuck with another weeks worth of this bullshit.
I suppose I'll get this pot round first and then maybe fuss with the alignment.
At this point though this whole project has taken alot longer than expected (as usual) and i've got some essential stuff I need to get around to. So I might shelve it again after getting the pot round.
Brass_Machine:
--- Quote from: S. Heslop on April 08, 2015, 12:57:46 PM ---...
Not sure if I'll call this whole thing a success though. All I really did was broke everything and fumbled about for a week trying to get it back together.
...
--- End quote ---
That's a line right out of my book! You are not alone...
S. Heslop:
Where abouts is a good place to buy high speed steel tool blanks? I've checked the usual places (arc euro and rdg) but they don't offer it in larger diameters. Cromwell tools does, but at £20 or w/e for the size i'm after that's quite pricey. Especially since I need a few
I'm trying to make some better wood lathe tools since the price of the tools themselves is incredible, and the profiles don't seem to be anything I couldn't grind and make handles for myself.
Regular chisels don't give alot of leverage and i've had the tool dig in a couple of times. Plus they're going blunt very fast. The outside is fairly smooth already but it'd be a stupid idea to try do the inside interrupted cut with the same chisel.
Also I need to figure out better speed control for that drill. It has speed control but it's fussy, and won't stay at a steady speed. Might try a dimmer switch, but i'll have to check if they can handle the load.
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