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Construction Equipment If it digs, pushes, hauls dirt "off road" post it here. |
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#21
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Re: Barge-Mounted Clamshell Crane
Tagline system is very ingenious! And the bucket is so well done - did you weight the lower pulley crossbar or was it heavy enough by itself? Everything works so smoothly - a credit to you craftsmanship. Keep up the good work.
Ken |
#22
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Re: Barge-Mounted Clamshell Crane
Wow! Great project! Just up my street.
My internet connection is too slow to see the video, so i have to wait! kerst |
#23
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Re: Barge-Mounted Clamshell Crane
the clamshell bucket is beautiful. I once built one for my Manitowoc. I really enjoyed that project.
how did you convert the servo motors to run the winches? kerst |
#24
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Re: Barge-Mounted Clamshell Crane
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Thanks, td9clyde. Quote:
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Or you can do it like this: http://www.seattlerobotics.org/encod...0for%20PWM.htm I'm not really an electronics guy and I didn't feel comfortable poking around the electronic guts. But this is probably the better way to do it because you don't have to worry about the pot changing position. |
#25
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Re: Barge-Mounted Clamshell Crane
Very impressive I love the video and thanks for posting the pictures. Everyone around here sets the bar pretty high.
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#26
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Re: Barge-Mounted Clamshell Crane
So the purpose of the tag line is to aid in the opening of the clam bucket?
Nevermind the lack of "house detail", you've done yourself proud with the exquisite engineering of a super smooth working model. "Function before beauty" has always been my motto. |
#27
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Re: Barge-Mounted Clamshell Crane
No Joe, the function of the tag line is to reduce the uncontrolled swinging of the bucket.
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#28
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Re: Barge-Mounted Clamshell Crane
Thanks, Lil Giants. What lorenzo said. And to keep the bucket from spinning and twisting up the hoisting lines. If you have a power operated tagline you can even pull the bucket in to dig closer or cast it farther away from the machine.
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#29
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Re: Barge-Mounted Clamshell Crane
There are power operated taglines too? Didn't know this.
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#30
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Re: Barge-Mounted Clamshell Crane
I know that for example the Manitowoc 4600 has a power tagline.
http://www.manitowoccranes.com/MCG_M...nal_cranes.asp Kerst |
#31
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Re: Barge-Mounted Clamshell Crane
Many thx Kerst .
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#32
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Re: Barge-Mounted Clamshell Crane
The power tagline on a clamshell is also used for the dipper trip when the machine is set up as a shovel. It usually runs off the end of one of the drum shafts and has a clutch that is set to drag a little bit to keep a constant pull. When you want to trip the dipper or pull on the clam you fully engage the clutch.
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#33
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Re: Barge-Mounted Clamshell Crane
I haven't made any progress on the crane for a while. Last winter when I was unemployed I had piles of time and no money, and now that I have a job I have money and no time and energy. But anyway, today it was time to refill the laundry detergent box so I put the clam bucket on the job. It took about an hour and a half to get it done. I shot a little video. I have a longer one if demand is there.
http://www.youtube.com/watch?v=wdm62...eature=feedwll |
#34
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Re: Barge-Mounted Clamshell Crane
Works very nice and smooth. One problem, How can I do that too? I use liquid detergent
How are your radio sticks set up? I sorta followed on the video. |
#35
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Re: Barge-Mounted Clamshell Crane
You might have to build one of those bags or buckets that helicopters use to drop water on fires. Left stick is u/d for boom, l/r for swing, right stick is u/d for the holding line, l/r for the closing line. To hoist a full bucket the right stick goes to the bottom left. If it was a dragline I would have the drag drum be u/d on the left stick and boom as l/r on the right stick.
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#36
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Re: Barge-Mounted Clamshell Crane
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Here's mine hope the dashes don't confuse you.I don't know how to put the diagram with out the letters bunching together. LEFT STICK--------------------------------RIGHT STICK --- not used-----------------------------------hoist up swing left-----swing right------------------- drag in------drag out ------- not used ---------------------------------- hoist down |
#37
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Re: Barge-Mounted Clamshell Crane
I should have done this before:
------LEFT STICK--------------------------------RIGHT STICK ------boom down---------------------------------hoist down swing left-----swing right-----------------bucket close---bucket open --------boom up------------------------------------hoist up My hoists are set up opposite of yours because on every machine I've ever run if you want something to go up you pull back and forward to go down so that's the way I think. I never thought about locking out the boom hoist but I'd love to be able to do that. I'll have to see if my radio can do that. |
#38
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Re: Barge-Mounted Clamshell Crane
AHH, I'm used to Bucyrus-Erie machines, they all hoist up by pushing forward on the hoist lever. I've run Bay City shovels and you pull back to hoist like most others. I heard several arguments before about why B-E does things different but can't remember why they did it. It makes sense to me because the first shovel I ever operated was a 10B B-E 3/8cy shovel.
If I ever get an operator on my 9W that likes Marion controls; I'll just reverse the hoist stick. |
#39
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Re: Barge-Mounted Clamshell Crane
Seems like I heard the reason for that, at least on the big draglines anyways was so you could push/pull both levers in the same direction when the bucket was moving away or towards the machine. Somewhere on Youtube a dragline operator was explaining why that was but I can't remember what or whose video it was. I figured on the small machines that's just the way the control linkages worked out. I wonder if the BEs with air controls are the same way?
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#40
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Re: Barge-Mounted Clamshell Crane
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Later, Neil#2 aka doodlebug. Last edited by doodlebug; 05-16-2011 at 01:59 AM. Reason: bad link |
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