 | | Re: Universal Joint Modifications for Train Applications
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(...) There are pictures of Shays at: (URL) #6 is the one I'm building a model of, as its wheels are bigger than on most others (4ft rather than 3ft), so the BBB wheels (3'9" in 8mm:1ft scale) fit better. So far I cut up 6 5L axles into 3.5L and (...) (20 years ago, 8-May-04, to lugnet.technic, FTX)
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| | Re: Universal Joint Modifications for Train Applications
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(...) For what I can read, it seems to be a good use for the broken u-joints (yes, they are toooooooo long)... but, can we see the piece modified? It may help looking for an alternative solution. An also, where can I see a Shay engine? I've never (...) (20 years ago, 7-May-04, to lugnet.technic, FTX)
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| | Re: SSClagorpion
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(...) I started putting together the trusses needed to articulate the hip and hook two hips together, and found that this leg design: (URL) to be compacted. I imagine the body truss made of long side rails, that the hips connected to. When I started (...) (20 years ago, 8-May-04, to lugnet.technic)
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| | Re: SSClagorpion
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(...) I used my brain..... (...) leg_cost = 2 pistons, 4 switches n_legs = 8 legs_cost = 8(2 pistons, 4 switches) = 16 pistons, 32 switches timing_cost = 2 pistons, 2 switches reverse_cost = 8 switches turn_cost = 8 switches total_cost = legs_cost + (...) (20 years ago, 8-May-04, to lugnet.technic)
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| | Re: SSClagorpion
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(...) ... (...) ... (...) How about if you make up a proposal? Actually, two. First, get out your pen, paper, calculator, sliderule, and excel spreadsheet, and figure out how many pistons & switches are required. I'd suggest two options: A) No (...) (20 years ago, 8-May-04, to lugnet.technic)
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| | Re: SSClagorpion
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(...) Thanks, Eric. (...) I think this will make forward/backward walking do a side to side stagger, as Steve realized sideways walking was going to work. (...) If we measure the total distance front to back that the foot travels, this tells us the (...) (20 years ago, 8-May-04, to lugnet.technic)
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| | Re: SSClagorpion
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(...) All along, I'd thought that it would zig/zag as it walks sideways, as you've noted. But I was wrong. A, D, E and H are in one leg group. This means that A, and E are walking forward/left, and D and H are walking backard/left. This means that (...) (20 years ago, 8-May-04, to lugnet.technic)
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| | Re: SSClagorpion
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(...) slight problem. When SSClagorpion is walking sideways, due to the LEG SWEEP the legs will be positioned as show above. However, when he takes a step left, legs A, B, E & F would be stepping forward(up)/left and C,D,G & H are stepping (...) (20 years ago, 8-May-04, to lugnet.technic)
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| | Re: Can someone identify this 'instruction kit' - red flip top hard case
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(...) Michael, From your brief description, it sounds like a dacta activity pack. You could narrow down the search for us by answering a few questions: 1) Is the box cardboard or plastic? Which logo is on the box (if any)? 2) Is the set 4.5V, 12V or (...) (20 years ago, 8-May-04, to lugnet.technic)
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| | Re: SSClagorpion
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(...) Kevin, I just finished looking at the Leg designs you have made. They are elegant as they are deceptively simplistic in their appearence. Great Job. You raise a good point. When the hip sweeps, (heh heh) each leg left and right, you'll need (...) (20 years ago, 7-May-04, to lugnet.technic)
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| | Re: SSClagorpion
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(...) I started to add the trusses needed to add hip sweep (I'm told Eric likes that phrase), and connecting legs together, but they are *very* far apart. Can;t even do cross bracing with 1x15 liftarms. I'm working on another prototype that has the (...) (20 years ago, 7-May-04, to lugnet.technic)
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| | Re: SSClagorpion
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(...) Hey guys. Just checking in to give my Friday Hugs and Kisses. Let's return to basics and give a breakdown of current studies and efforts. Where do we stand with our beloved, yet silly named project? I personnaly know, but let's lay it out for (...) (20 years ago, 7-May-04, to lugnet.technic)
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| | Re: Can someone identify this 'instruction kit' - red flip top hard case
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(...) Anything like this? (URL) (20 years ago, 7-May-04, to lugnet.technic)
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| | Re: SSClagorpion
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(...) I suspect once you get the switches added, there will be more support. But it seems like a stop at one or both ends would not be a bad idea. (...) Yes, that leg looks very good. (...) The touch sensors don't have to be in the feet. They could (...) (20 years ago, 6-May-04, to lugnet.technic)
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| | Re: SSClagorpion
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(...) Welcome to the "Department of Redundancy Department". LOL! (...) I don't think so as long as the piston head is not flexed too much side to side. Too much misaligment can cause seal leakage. Also I can try to add a mechanical stop that (...) (20 years ago, 6-May-04, to lugnet.technic)
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| | Can someone identify this 'instruction kit' - red flip top hard case
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I ended up with this 'red container' with a flip top from a collector we bought out, but have been unable to identify it's kit number or where it would have originally come from. Inside the red flip top case is a series of instructions for various (...) (20 years ago, 6-May-04, to lugnet.technic)
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| | Re: SSClagorpion
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(...) Makes sense to me. Makes sense to me. Makes sense to me. Makes sense to me. :) The prototype leg looks very good. However, I do have one question. Given the angle of the leg, there will be pressure on the sidestep piston to pull the piston (...) (20 years ago, 6-May-04, to lugnet.technic)
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| | Re: SSClagorpion
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(...) I don't know if this timing diagram helps explain the verbiage above. Forward slashes represent the pistons expanding, and the backward slashes represent the pistons contracting. Horizontal lines represent unchanging pistons. When all four (...) (20 years ago, 6-May-04, to lugnet.technic)
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| | Re: SSClagorpion
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(...) If things do not want to unlock, the entire walking sequence stops. The whole walking sequence requires that each set of pistons in turn completely transition from closed to open, or open to closed. (...) Transitions happen when the switches (...) (20 years ago, 6-May-04, to lugnet.technic)
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| | Re: SSClagorpion
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(...) So what happens if one set of legs manages to lock, but doesn't want to unlock, while the other set of legs never locks at all? It's possible that the front/back leg pairs will behave differently if the back legs are longer like on a real (...) (20 years ago, 6-May-04, to lugnet.technic)
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