Subject:
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Re: Video of Cable Shovel In Action
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Newsgroups:
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lugnet.technic
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Date:
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Tue, 4 Oct 2005 12:05:43 GMT
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Viewed:
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5134 times
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On 03/10/05, Benjamin Ventura <generaldisarray2005@yahoo.com> wrote:
> In lugnet.technic, danny staple <orionrobots@gmail.com> wrote:
> >
> >
> > Ah - understandable. I actually stocked up on them from bricklink, as
> > I so often found them useful. I admit - I tend to agree with you on
> > the noise making it "larger than life". Any chance of videos of the
> > upgraded hoist then?
> >
> > One other thing - how are you controlling it? I see the huge battery
> > and counterweights, but what have you got at the other end of that
> > bundle of control cables?
> >
> > I am looking forward to the drilling rig - laying pipe as well means
> > you might even build a small functional Lego TBM - cool.
> >
> > Danny
> > --
> > http://orionrobots.co.uk - Build Robots
>
> Re: control, I am using switches and a project box that I purchased at
> radioshack. Unfortunately this does not allow for proportional control of
> machine functions, it is bang-bang. You can see the tethered remote in the
> first two pictures in this gallery:
>
> <http://www.brickshelf.com/cgi-bin/gallery.cgi?f=123410>
>
> So control is basically an aluminum box with a bunch of 3 position, 6 pin
> switches on it (forward, off, reverse).
>
> I will get video of the digging action with the new hoist powerplant.
>
> I think a tunnel boring machine would be an awesome lego project, that is up
> there on my list of things to build. I think the ultimate project would be a
> working giant bucket wheel excavator.
>
> I don't have pictures of the prototype drilling rig yet but I'll get some
> soon.
> Over the weekend I made some progress there: I build a clamp-like lego
> structure, that has motorized wheels on the inside of the clamp's fingers. I
> then put a 1/4 inch diameter threaded steel pipe in the clamp. For the
> drilling
> bit, the pipe has an adapter to fit a wider pipe at the bottom, and I used a
> dremel to cut 4 teeth into the bottom of the adapter. Then I hooked up a
> garden
> hose to the top of the pipe (with a swivel adapter allowing the steel pipe to
> spin, but the hose stay still), turn the clamp's wheels on, and stuck the
> thing
> on some dirt.
>
> So, the motor-clamp turns the drill pipe, and the water from the hose comes
> down
> the drillpipe & out the bit, and is supposed to remove the material after the
> bit cuts it.
>
> It kind of works.. there are problems with friction but I think if I keep at
> it
> I can really get it to dig. Stay tuned!
>
> -Ben
Ah - now you have pointed it out I see it. I am not a Lego only
evangelist, but there is scope for it to be replaced with some Pole
Reverser switches and a Lego frame. I am wandering if an RCX could be
used with it, to automate it for fun.
I really like the marbles + hailfire rails for a turntable with
bearings. Could Lego soccer/basket balls be used for that or would
they be a little too weak? They also might introduce a little too much
friction of their own - but again, just a thought. What is the weight
of the load they are bearing? I do have to get myself a couple of the
hailfire rings.
I am having a bit of trouble picturing the rig you have built, I dont
quite get what those wheels on the clamp fingers do I am afraid -are
they actually turning the drill bit? I cant wait for some pictures
though...
Danny
--
http://orionrobots.co.uk - Build Robots
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Message is in Reply To:
 | | Re: Video of Cable Shovel In Action
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| (...) Re: control, I am using switches and a project box that I purchased at radioshack. Unfortunately this does not allow for proportional control of machine functions, it is bang-bang. You can see the tethered remote in the first two pictures in (...) (19 years ago, 3-Oct-05, to lugnet.technic, FTX)
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