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I'm drooling over those CAD pics!! I don' t think I have seen that level of detail before.And the proper term is "dip stick". I grew up with earth moving as Dad was with CAT.Many years ago I went to the coast in California where a guy had a steam shovel that he and his friends fired up a few times a year and dug around the guys sand pit. I actually got to work the thing and dig for about a half hour. They let anyone who wanted to try it out, do it!!!I don't think there's enough pop corn between here and New Zealand to feed the crown watching this build.Pete
Another impressive drawing Chris.I've been trying to figure out if the main boom raises up and down?Jim
Quote from: Flyboy Jim on October 20, 2017, 12:04:47 AMAnother impressive drawing Chris.I've been trying to figure out if the main boom raises up and down?JimNo - the main boom is at a fixed angle, it just swings side to side.The smaller boom pivots up and down as the bucket chain is run in and out. There is also going to be another steam engine on the main boom, just below the smaller one, that drives a small gear that engages a gear rack along the bottom of the smaller boom, which makes it extend in and out from the pivot point. That is where they get the rest of the motion on the bucket - a very different mechanism than they use today on things like backhoes.This video shows the actions nicely - different model machine, but same style booms:http://www.youtube.com/watch?v=6Pzs7YZICDQ
The dip stick engine drives the crowd spur gear which drives a rack gear on the bottom of the dip stick. Dip stick UP to bring the bucket closer to the house, dip stick DOWN to crowd the bucket into the bank. I just love this stuff!!! Pete
Errr ... Thanks Chris. That song is in my head now Tom
Hi ChrisEverything in coming along nicely, Fusion sure does a nice job on the chains! Do the gears have an involute tooth form? in the pictures they appear to be more flat?Not that is matters but I do like the pictures better without the grid, I find it kind of distracting.Keep up the great work!Dave
Good work Sherlock! Looking forward to the drawings so I can understand what you're talking about. Jim