1/16 Bucyrus-Monighan Walking Dragline

[kerst]

Nice setup!

Kerst

[modelman]

Nice set-up steve-seems like I spend half my time trying to build something to hold something like you did. I guess that's how it goes. Are the saws carbide? I tried slitting tubing with a dremel saw a few years back and trashed the tubing and the saw.

[pugs]

Looks like just standard High speed steel jewelers saws. I've been using a .0625" by 6" saw on my manual mill for the last 2 days as well, great fun.

[9W Monighan]

Yes they're just high speed steel (two stacked) but a little dull but work fine. The new setup works great now that I can push the tube closer to the fixture and I can cut into it rather than the toolmakers vice I managed to get three more mitered and notched this evening (about 45min). Maybe tomorrow I'll knock a few more out. This run of pieces has 2 sets of 20pcs. I'm having some trouble dialing in the different angles, their not 45deg their 43.8 46.6 etc.

[pugs]

You've got CNC, why angle the vise? Just make the cut angled. Should be real easy if your machine will take a polar coordinate move. Program for your start and end point, and just change the Polar angle for each tube. If no polar then just some quick math to determine new endpoint for different angles

Or is there something I'm missing???

[9W Monighan]

I can do it quicker manually since there's only two pieces each. First I'd have to locate each one for length possibly rough cut the angle on the bandsaw so I wouldn't have to take several small cuts and do a program for each set. I've done it before on some of the other pieces but it's not worth it for the hundreds of different sized pieces. If I had a tiny chop saw I could cut the angles but I would still have to orient them in the vee fixture properly for notching. I would definitely do the CNC set up if all of them were the same.

[pugs]

Ok, that makes sense. I guess for some reason I was thinking a bunch of them were similar.

[modelman]

Steve-any progress on the boom?

[9W Monighan]

That's funny I was going to post at lunch but we rode up to TACO SMELL first Been busy this past week but found an hour here and there to make some tubes. Every pair is a different length,and angles are different each end because; the tube's edge goes from one side to the other side of the centerline.
Well, I got enough pieces (40) for both sides of the bottom 45'' section done. Now I need to mill the "T" chords to proper length and drill all the slice plate holes. Then on to soldering

[pugs]

Looking good!

[dirtpusher9]

That looks good, Steve. How long is the boom going to be or did I miss that?

[9W Monighan]

Originally Posted by dirtpusher9

That looks good, Steve. How long is the boom going to be or did I miss that?

About 122.5''

[modelman]

Good timing huh! Looks perfect. Nice joints!

[dirtpusher9]

Man, that thing is going to be a beast. What are you using for cable? or (line)

[Brian in PA]

Nice work Steve!

Brian

[9W Monighan]

Thanks all.
Joe, I can't remember what sizes the cables are. I've been experimenting with 3/64'' , 1/16'', & 3/32'' 7x19 to see how flexible they are. But to be scale the drag (2'')=1/8'', hoist (1.5'')=3/32, boom ropes and bucket dump (1'')=1/16''

[9W Monighan]

Got some more progress this week. There's a lot of tiny details unforeseen here. Still need some splice plates.

[modelman]

Looking really good! Work faster! Wanna see more!

[9W Monighan]

10% inspiration 90% perspiration--------- Well, lots of procrastinating really

[pugs]

Looking better and better