 | | Alvin Brant, what is your email address?
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I think I might have asked for this email before, but do not have any record of it. (19 years ago, 29-Sep-05, to lugnet.technic)
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| | Re: Help please: I'm trying to get two outputs from one shaft
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(...) Hi Tony, I'm glad I could help... I've added three more simple mechanisms to the webpage (actualy two pages now): (URL) are: - The walking worm gear one into two. This turned out to be very compact but not as reliable as the spur gear one (...) (19 years ago, 29-Sep-05, to lugnet.technic)
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| | Re: New technique: three position piston control
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(...) <snip> I used some axle joints to optimise cylinder position limiting in normal logic (...) Do you have a website where I can peruse your work? (...) (19 years ago, 28-Sep-05, to lugnet.technic, lugnet.robotics)
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| | Re: New technique: three position piston control
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(...) No, I was so busy at work that I missed a couple of days online! I had a look at both, but a dual piston scheme works better for steering because of equalising the piston area and pushing at least 3 switches. In fact I have two cylinders in (...) (19 years ago, 28-Sep-05, to lugnet.technic, lugnet.robotics)
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| | Re: Help please: I'm trying to get two outputs from one shaft
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(...) That looks a very nice simple solution to the problem, the simple solutions are usually the best! I will certainly be using it to give more function from the auxiliary output of the RC car unit. Tim (19 years ago, 28-Sep-05, to lugnet.technic)
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| | Re: Help please: I'm trying to get two outputs from one shaft
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(...) Followup... this works beautifully. I was a little worried at a few stages of construction when the 1x4 brick sometimes would rotate until it wasn't engaging either gear and then sit there with the 8t gears spinning freely- but in the full (...) (19 years ago, 28-Sep-05, to lugnet.technic)
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| | Re: Help please: I'm trying to get two outputs from one shaft
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(...) I will have to dig it out - but somewhere I have a fairly simple LDraw file showing that sliding worm gear device. I also made an interesting variation on this using Lego clutch gears which allowed 2 motors to give 2 outputs each, plus an (...) (19 years ago, 28-Sep-05, to lugnet.technic)
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| | Re: New technique: three position piston control
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(...) Mark, Did I miss your answer on this? Kev (...) (19 years ago, 28-Sep-05, to lugnet.technic, lugnet.robotics)
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| | Re: Help please: I'm trying to get two outputs from one shaft
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(...) This is great stuff, and will probably work for my application. It's mechanically much simpler than a differential with rachets. Thanks!! (...) I think I can picture how that works: You have a 4-stud-long box with a shaft running lengthwise (...) (19 years ago, 27-Sep-05, to lugnet.technic)
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| | Re: Help please: I'm trying to get two outputs from one shaft
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(...) Hi Tony, Here is something I put together real fast during my lunch break: (URL) The movies are quite big (4MB a piece) but they show clearly how this thing works... Notice that it works in any position as the mechanism is balanced. An other (...) (19 years ago, 27-Sep-05, to lugnet.technic)
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| | Help please: I'm trying to get two outputs from one shaft
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I have one shaft that will be turned by a motor in either direction. And I want to get two different outputs, based on which direction the motor is turning. When the Input shaft turns clockwise, Output 1 turns and Output 2 does not. When the Input (...) (19 years ago, 27-Sep-05, to lugnet.technic)
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| | Re: New technique: three position piston control
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WOW you did it again!!! you keep amazes me, cool consept whit a center stop, (...) i was thinking about a center stop myself to make my creations more smootly and extending the combinations of piston movement, but i'm to busy whit my education so i (...) (19 years ago, 27-Sep-05, to lugnet.technic, lugnet.robotics)
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| | Re: Cable Operated Shovel
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(...) Hello Ross, About the bucket - that is the one thing I forgot to take pictures of. The bottom of the bucket does open and close. At the end of the boom that the bucket is mounted on, at the intersection of the grey and black pieces, there is a (...) (19 years ago, 26-Sep-05, to lugnet.technic, FTX)
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| | Re: Cable Operated Shovel
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(...) Hello Nathan, so I do want to spend a fortune on the tracks.. I just need to get my hands on one! Did you see the (incredible) "PARV": (URL) I would really like to build some tracks like that machine has, when I get a chance to save up some (...) (19 years ago, 26-Sep-05, to lugnet.technic, FTX)
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| | Re: New technique: three position piston control
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(...) Its all over my head. Thats all I can say. Maybe one of these days I can understand all that circuitry. Good job Kevin! (19 years ago, 26-Sep-05, to lugnet.technic, lugnet.robotics)
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| | Re: New technique: three position piston control
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In lugnet.technic, Mark Bellis wrote: <snip> (...) Was this single or dual piston? (...) Kevin (19 years ago, 26-Sep-05, to lugnet.technic, lugnet.robotics)
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| | Re: New technique: three position piston control
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(...) <snip> (...) The center stop is not the same spot when expanding vs. contracting. I did not try it at different pressures. I just pumped a hand pump as fast as I could to make the sequencer go. I've not seen it overshoot the mid point. (...) (...) (19 years ago, 25-Sep-05, to lugnet.technic, lugnet.robotics)
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| | Re: New technique: three position piston control
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In lugnet.technic, Kevin L. Clague wrote: (SNIP) (...) Interesting stuff! Should make walkers move more smoothly, with the possibility of more groups of legs. The trick will then be reversing all the groups, since it was easier with just two, using (...) (19 years ago, 25-Sep-05, to lugnet.technic, lugnet.robotics)
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| | New technique: three position piston control
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Years ago when I first started playing with pneumatics, I first learned that I could control a piston using a switch. I then learned that you could mechanically link a piston and a switch, and have piston controll the switch. I learned from Eric (...) (19 years ago, 24-Sep-05, to lugnet.technic, lugnet.robotics, lugnet.announce.moc) !
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| | Re: Cable Operated Shovel
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Nice Ben! (19 years ago, 24-Sep-05, to lugnet.technic, FTX)
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