Re: Shovel mechanics
 

I bookmarked those racks and gear....
Just need to figure out how to make the pulley and yoke combination for the bucket and boom tip.... mostly the yoke.....that the pulley needs to rest in...

Re: Shovel mechanics
 

Your first example pic has a single 'horizontal' Sheeve at the bucket, that floats in the mounts to keep the sheeve inline with rope pull
https://i.ytimg.com/vi/MDnxrDHvqoU/maxresdefault.jpg

Looking at this model,
https://live.staticflickr.com/65535/...c60cd84e_z.jpg

What if ya drill pair of holes on Right and Left side walls at Top Aft corners of Bucket for a steel axle to run left-right. Chunk of brass tube that runs over the axle right-left just under the width of bucket to move freely, roll a sheet of flat brass around the tube, extend the sheet up far enough to house and guide the rope around the pulley. Little solder, poke a couple holes, print a pulley. Maybe even skeletonize the down/aft side to help it shed dirt from pulley?
(Basically making a bigger version of your Nylint cranes Boom elevation tip pulley, but where that wire bridal ties it to boom is your new axle in the bucket)

Or the bigger machines often ran a pair of taller 'vertical' sheeves, which could probably just be done with putting the pair of pulleys along side the dipper stick with a couple spacers inboard of the pulleys. I doubt you'll need that much mechanical advantage.
Similar to the set of outboard pulleys on my Michigan (boom angle)
http://i.imgur.com/NA2dj3Nh.jpg

This seemed kinda cool, talks about history and why dipper powered crowd works
https://www.inventionandtech.com/con...-build-america

Re: Shovel mechanics
 

I see how that one is squared off at the bottom where it attaches to the bucket I could probably bend up some brass like that... I think I have the boom sheaves worked out... just getting that yoke design to look right....Your idea seems the most doable right now.

Re: Shovel mechanics
 

I'd missed the square profile there. They also have several sizes of brass Square and Box tubing profiles, but i'm not sure how that bucket scales out to know if those could be an even easier option.

I dunno, i'm just trying to think low-tech solutions.
"Then you just take it out of your 5-axis cnc mill, chamfer the edges, and put the new piece of jewelry on the shovel"

Re: Shovel mechanics
 

LOL....5-axis CNC mill....more like tin snips,vice grips and a hammer....
If you look at that one small shovel it has what looks like a square shaped yoke that the pulley rides in at the bucket....that's what I'm thinking thru....

Re: Shovel mechanics
 

Maybe something like the multipack could be a good start?
https://smile.amazon.com/gp/product/...?ie=UTF8&psc=1

Couple holes, some cut & file work

Re: Shovel mechanics
 

I think I have most of the materials to make it... just need some brass sheet, the local hobby shop has that....I'll "study on it" for a while probably won't start it until this fall...

Re: Shovel mechanics
 

Gotta be careful though.
It starts off with "I want a 'steam-shovel' to run", then next thing you know "Well now i need a steam dumptruck to load, so it doesn't look too weird loading a modern tri-axle dump."

https://youtu.be/ZpFqJguz8Vw

----
Some more inspiration

https://www.nesys.org/HCEA/AdPix/AdPixTom.html

https://heritagemachines.com/plant-m...hovel-history/

https://youtu.be/_Y-XAn9K-Ok

Re: Shovel mechanics
 

LOL I kind of already went there..... got the parts to build a 55 Ford dump truck... not steam but closer period wise

Re: Shovel mechanics
 

Found a collection of some Cable Excavator ads from 1920-40s that look like they could be pretty useful

https://www.nesys.org/HCEA/AdPix/AdPixTom.html

Re: Shovel mechanics
 

Yes they will be.... great timing too, I just started this week experimenting with some pulley designs and sizes...I think I have most of the boom mechanics worked out in my head hopefully they work in reality...
Still working on how I'm going to make a frame work to mount the cable drums and their servos...

Re: Shovel mechanics
 

Some really cool stuff there. Thank you for sharing Frizzen.

That Buckeye "Clipper" shovel has a really cool looking house on it. I may put one in the future builds list :thinking:


-Shawn-

Re: Shovel mechanics
 

I noticed that too.... kind of a streamliner/ Art deco look.... pretty cool on a shovel

Re: Shovel mechanics
 

Yeah, that Buckeye Clipper has really nice looking lines, and the sign-painter graphics on the side really do it for me. Plus i was checking out the trucks that are being loaded.

Most of the period photos i've found don't show the rigging very well. The ads seem like the cables were redrawn heavier to help show that off to potential buyers

Re: Shovel mechanics
 

Here's one for some inspiration, Crueby's Mann steam truck build. https://www.modelenginemaker.com/ind...ic,9748.0.html
Chris also built the Lombard shown in our Tracked Utility Vehicles section.

He's got a lot of other builds on the Model Engine Maker website if you're interested, I highly recommend his Marion Shovel build.

Don

Re: Shovel mechanics
 

Ddmckee,
Wow the model engine maker site has some killer work!!!

Yeah, that Lombard log hauler Tracked-train thing was crazy awesome

Re: Shovel mechanics
 

Yeah, Home Model Engine Machinist is another good site.
HMEM

I think HMEM was one of the first model engineering sites that I found.

Re: Shovel mechanics
 

Also ran across this site with a bunch of vintage mining info while i was looking for some Mack M15 - M100 stuff

http://stripmine.org/

Equipment files
http://www.stripmine.org/equipfiles/index.html

Re: Shovel mechanics
 

Great reference.. I found some really good pictures of the Tournadozer

Re: Shovel mechanics
 

Thanks for sharing. I have been looking for info on the bucyrus 88-b. the site has spec sheets and manual scans! I'm now one step closer ;)