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Another Unit Crane
Well it arrived in the mail today. Scott's build of the unit crane inspired me to build one myself. Mog and I have all the hauling down pat but nothing for loading! I got some 360 robotic servos on the way to that are about the same strength as Scott's.
They huge package that arrived! http://i15.photobucket.com/albums/a3...10209-1801.jpg It emerges! http://i15.photobucket.com/albums/a3...10209-1805.jpg TA DA! http://i15.photobucket.com/albums/a3...10209-1811.jpg I like the size! http://i15.photobucket.com/albums/a3...10209-1820.jpg Just wonder if a boom extension would be good. |
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I think you started a trend Scott:D
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just looking mine over right now. the string is rotten, there is rope around the rear axle, the front outriggers are bent on one side and the boom is held together with a nail and the end pully is all bent up. ebay's gonna love me... lol
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Go Dean!:D
It'll be cool seeing another Doepke crane run. |
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Wow, that gonna be nice.
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what i got for a bucket.
http://i15.photobucket.com/albums/a3...ane/bucket.jpg "It's a brass, highly detailed dragline bucket. It has one shive to work the bucket. The picture doesn't to the detail justice. The bucket is fully functional. It has chains and a crossbar. The scale would be 1:48. (works out to 1:16 for the Unit Crane) The bucket open is three and a half inches. The bucket is 1 1/2 inch wide, 1 inch high from the bottom of the bucket to the top of the side rail - not including the teeth, and 1 5/8 inch from the bottom of the teeth to the very highest part of the bucket. It is also 2 1/2 inches long." |
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wow sweet bucket where did you ever find that
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That may work out to be about 5/16 cu yd bucket. I wonder how well it will work. I was thinking about getting one of those some day for my extensive dragline bucket collection.
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well from the measurements scott got i think its about scale. might get a bigger bucket in the future but this has all the goodies. shiv, chains, etc.
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servos arrived today. just gotta wait for the bucket and string right now.
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Re: Another Unit Crane
Yay! More cable machines! I'll be watching this. I've had pretty good luck with using braided fishing line rather than string. It's stiffer like cable and you can get different diameters depending on what test you buy. Just make sure it's fairly round and not the flattened stuff. I use Stren.
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Re: Another Unit Crane
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You might look into braided silk fishing line on eBay. I use it on my 1'25 crane, but it is strong enough for larger scales. It will cut your hands before it will break, if it's not rotton. And it looks like cable; black, round, not flat. Dan |
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the stuff i have coming is braided string. looks like cable. dunno strength yet. reason i got it was it comes with re-string instructions lol
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Re: Another Unit Crane
Dean, I use 2mm black nylon cord. As soon as you posted up that you bought a crane I searched all through my e-mails and paypal to try and find out where I bought the cord from and couldn't find the place. I think I bought it from a venetian blinds manufacturer.
The nylon cord is very strong and you can melt the ends. What is nice is you can make a single knot to tie it and just slightly melt the knot to keep it from coming loose. |
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hmmm what i got coming is 18 feet long. should be enough for now i think.
http://cgi.ebay.ca/ws/eBayISAPI.dll?...#ht_684wt_1139 |
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Hey dean Gona be a cool build with not having to break the bank to load those trucks you guys have ...Are you thinking of using that truck chassis and just mounting the house on it?
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not really lol. i kinda like the idea of pulling it around lol. I do want to make an extention to put in at the half way mark. its a bit short at ground level.
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Re: Another Unit Crane
Well a few updates today. Got out to Martins today to work on the Unit Crane. Think he just wanted to see it more then anything but then we started working on it lol.
first off we got the cab off the chassis http://i15.photobucket.com/albums/a3...10221-1503.jpg I noted the main up boom was bent. infact quite a bit was bent. hard to tell some places. http://i15.photobucket.com/albums/a3...10221-1525.jpg Martin machined up some spindles http://i15.photobucket.com/albums/a3...10221-1623.jpg Got the servos mounted to some aluminum. http://i15.photobucket.com/albums/a3...10221-1628.jpg mounted spindles http://i15.photobucket.com/albums/a3...10221-1709.jpg got the old hand driven cranks out http://i15.photobucket.com/albums/a3...10221-1720.jpg got a rough opening made and the servos sitting in there http://i15.photobucket.com/albums/a3...10221-1820.jpg got it stringed up temp http://i15.photobucket.com/albums/a3...10221-1835.jpg got the clam on http://i15.photobucket.com/albums/a3...10221-1836.jpg then we had to go play in the flax. took some vids but i gotta get them on the lappie http://i15.photobucket.com/albums/a3...10221-1908.jpg |
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Great progress Dean & Martin! It will be cool to see vids.
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lol putting them together now.
Hey Scott, I noticed our Unit Crane chassis are different. your had some ratchet or driven swivel for the cab? Also do we have the string ran right? |
Re: Another Unit Crane
Doepke made some that had a thumb wheel to rotate the crane.
Here is a pic that might help with routing the string. http://i240.photobucket.com/albums/f...crane24ant.jpg |
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by golly i think we got it right!
for your top servo mount, does it bend down then go to a standoff and bolt to the floor? Also how is the angle aluminum mounted at the floor? |
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Cool you got it running.:) It does look like you have the ropes routed properly.
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Many thanks to Stuff and Small Haul for the well documented conversions of these older toys. Any chance one of you might put a motor and driveline under one of the cranes?
Lynn |
Re: Another Unit Crane
LOL everyone wants one of them. Scott is making a tracked one and i think im gonna just pull mine around for now lol. kinda expensive upgrade to it for it to move so little. Scott's tracked one is gonna use a separate rc gear for the tracks and i dont blame him. he would have to get one of those center things that lets you run the wires down and being servo that would 6 wires worth and not cheap to do!
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Re: Another Unit Crane
Also some info on those servos. Apparently it only has one metal gear... but it does have dual ball bearings.
Modulation: Analog Torque: 4.8V: 201.4 oz-in (14.50 kg-cm) 6.0V: 213.9 oz-in (15.40 kg-cm) Speed: 4.8V: 0.19 sec/60° 6.0V: 0.16 sec/60° not sure what speed works out to but it seems fast enough for me! |
Re: Another Unit Crane
them center "things" dean are called slip rings i have heard of ppl using ball bearing. i never try my self yet. just make shere you get steel ball's.
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Re: Another Unit Crane
this is what i plan to do for an extension of the boom. see how it goes out then back in for thickness? well at the unit crane's hinge point i want to add an extension like Scott did. should make loading trucks easier!
http://i15.photobucket.com/albums/a3...mextention.jpg also this crane is for sale on kijiji in alberta :P dont ask why i was looking that up lol |
Re: Another Unit Crane
how much
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Re: Another Unit Crane
well so far the string arrived, and today the bucket and the magnet arrived. magnet is lame but it was dirt cheap.
http://i15.photobucket.com/albums/a3...10308-2122.jpg http://i15.photobucket.com/albums/a3...10308-2122.jpg get a feeling how small this stuff is? http://i15.photobucket.com/albums/a3...10308-2125.jpg another rant. why the h-e-double hockey sticks would you paint up brass parts and brass chain.. *facepalm* |
Re: Another Unit Crane
Anybody who would cut up a vintage toy, especially a crane, and power it up with RC stuff...is OK in my book! I love this stuff! Dan
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The way I see it, we are giving these toys a new life. Sure we might be changing and cutting them up, but for the greater good, not a scrap pile.
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...And as long as it's OUR toys, well, now they're better toys!
I have plans to power up this 1/25 crane eventually. http://i343.photobucket.com/albums/o...ictures523.jpg http://i343.photobucket.com/albums/o...ictures526.jpg It won't be self contained though. it will be mounted on a diorama, and the motors will be under the table. the upper unit will be fully functional, the tracks will be planted. I may build a truck type carrier chassis for it however. It too would be mounted to the dio. I did a similar convesion on an O scale (1/48) Northwest crane, smaller than this one. It was for a guy with an elaborate big bux model railroad. The crane worked well. I didn't have a digital camera then. |
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Ah, kinda like the demo that the coal mines have. its not wireless RC and they have a slot cut out that the cables follow along. Mind you I havent seen one since i was a kid but there has to be a dragline RC sitting in someone's garage or something that worked at the mines...
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Re: Another Unit Crane
Making some good headway on the project Dean, what's next to tackle?
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Re: Another Unit Crane
extending the boom and getting a good radio to use in it.
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