 | | Scissor Lift in LEGO? —William R. Ward
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| | | (cross posted to (URL) blog> and BayLUG Mindstorms mailing list) Have you ever tried building a scissor lift in LEGO? I’m working on a project that calls for that kind of mechanism to lift it up, like those food service trucks at the airport. It is (...) (18 years ago, 3-Mar-06, to lugnet.technic, FTX)
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| | | | | Re: Scissor Lift in LEGO? —Rob Hendrix
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| | | | | "Bill Ward" <bill@wards.net> wrote in message news:IvKJHv.1xLK@lugnet.com... (...) Posting to Lugnet so others can see. My $.02, but I'm no mechanical genius: Why don't you use one of those gear holders that holds a worm gear and 24t gear in it. (...) (18 years ago, 3-Mar-06, to lugnet.technic)
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| | | | | | | Re: Scissor Lift in LEGO? —Robert G Fay
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| | | | | | | "Rob Hendrix" <rob.removebeforesen...msltc.org> wrote in message news:IvKKqA.255E@lugnet.com... (...) Rob, You are one of the above. Bob Fay (18 years ago, 3-Mar-06, to lugnet.technic)
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| | | | | | | Re: Scissor Lift in LEGO? —William R. Ward
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| | | | | | (...) I deg to biffer. (...) That may just be crazy enough to work. I'll try it! (18 years ago, 5-Mar-06, to lugnet.technic)
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| | | | | Re: Scissor Lift in LEGO? —Ross Crawford
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| | | | | (...) Haven't actually built one, but one other possibility may be to use string rather than gearing directly. How many scissors are there in your lift? On the real ones I've seen they often have a hydraulic cylinder going from the bottom scissor to (...) (18 years ago, 3-Mar-06, to lugnet.technic, FTX)
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| | | | | | | Re: Scissor Lift in LEGO? —William R. Ward
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| | | | | | (...) On a winch? That's an intriguing idea. (...) Just one scissor. (18 years ago, 5-Mar-06, to lugnet.technic, FTX)
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| | | | | | | | Re: Scissor Lift in LEGO? —William R. Ward
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| | | | | | (...) Update: I ended up using string and it worked beautifully! Well, it has weight distribution issues (one side goes up before the other) but I'll work on that later... (18 years ago, 10-Apr-06, to lugnet.technic, FTX)
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| | | | | Re: Scissor Lift in LEGO? —Geoffrey Hyde
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| | | | | Some photos of what you've tried so far would help a great deal. I was wondering if it would be possible to see how cloesly you're matching up the worm gears to the rack gears, theoretically, it should be possible, but if you're using more than one (...) (18 years ago, 4-Mar-06, to lugnet.technic)
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| | | | | | | Re: Scissor Lift in LEGO? —Robert G Fay
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| | | | | | | "Geoffrey Hyde" <g.hyde@bigpond.net.au> wrote in message news:IvKtn1.16vD@lugnet.com... (...) (URL) may give some ideas. I made a nut out of two 8 tooth gears and used a string of worm gears as a lead screw, but I cannot find the picture. The best (...) (18 years ago, 4-Mar-06, to lugnet.technic)
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| | | | | | | | | Re: Scissor Lift in LEGO? —Geoffrey Hyde
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| | | | | | | | Those are some interesting milling machines there Bob. How do you think they'd look if built in the newer studless beams? Do you think there'd be any insurmountable rigidity problems building with studless beams? I noticed you had one long worm gear (...) (18 years ago, 4-Mar-06, to lugnet.technic)
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| | | | | | | | | | Re: Scissor Lift in LEGO? —Robert G Fay
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| | | | | | | | "Geoffrey Hyde" <g.hyde@bigpond.net.au> wrote in message news:IvLB88.1D9t@lugnet.com... (...) Actually the gears cannot rotate as they are meshed with each other. This causes them not only to support the screw, but act as a nut creating linear (...) (18 years ago, 4-Mar-06, to lugnet.technic)
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| | | | | | | Re: Scissor Lift in LEGO? —William R. Ward
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| | | | | | (...) I'm sure they would. Sorry I just haven't taken any yet. But this thread has given me some great ideas to try... (...) The worm gears are aligned carefully, and they seem to mesh fairly well, but I think ultimately rack gears and worm gears in (...) (18 years ago, 5-Mar-06, to lugnet.technic)
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| | | | | | | | Re: Scissor Lift in LEGO? —Robert G Fay
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| | | | | | "Bill Ward" <bill@wards.net> wrote in message news:Ivo9xE.1oBF@lugnet.com... (...) They do not mesh. We need a rack like this ///.../// not |||...||| . Bob (18 years ago, 5-Mar-06, to lugnet.technic)
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| | | | | Re: Scissor Lift in LEGO? —Chris Daniel
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| | | | | Bill, I Built A Scissor Lift with a pneumatic piston in the middle. (URL) (18 years ago, 4-Mar-06, to lugnet.technic, FTX)
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| | | | | | | Re: Scissor Lift in LEGO? —William R. Ward
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| | | | | | (...) think it would get too bulky. But I'll keep that in mind... (18 years ago, 5-Mar-06, to lugnet.technic, FTX)
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| | | | | Re: Scissor Lift in LEGO? —Nathan Bell
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| | | | (...) Hi Bill. I came up with a design about a month ago. It was never finished, but may be in the future. (URL) only problem is that the way I have it angled, the pistons have to push hard at the beginning of the ascension. However, this is the (...) (18 years ago, 6-Mar-06, to lugnet.technic)
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