 | | Re: SSClagorpion
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Last night I had this freakish dream of a giant LEGO scorpion crawling around (and very quickly too) on the floor. Kevin was standing nearby and commenting on its performance. There was someone else there too, I think it was Eric. The scorpion was (...) (20 years ago, 3-Jun-04, to lugnet.technic)
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| | Re: SSClagorpion - Compressor
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(...) While a rotary design will probably be a bit more powerful, laying them all flat could be more versatile. You could place cylinders anywhere you've got a little open space, rather than having to make space for a bulky cluster of them. (URL) (...) (20 years ago, 3-Jun-04, to lugnet.technic, FTX)
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| | Re: SSClagorpion - Compressor
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(...) You are absolutely right of course.... You'd think I'd have a better understanding of hexagons than that. :^) Kevin (20 years ago, 3-Jun-04, to lugnet.technic)
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| | Re: SSClagorpion - Compressor
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(...) If you rotate the pulley 90 degrees on the axle, the holes will be in the right place. Another option is to mount the other end of the pistons at 30 degrees (like a rotary engine) (20 years ago, 2-Jun-04, to lugnet.technic)
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| | Re: SSClagorpion - Compressor
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(...) I knew what you were saying, but I was explaining it for those who couldn't read between the lines...... I'm going to try a radial design. Medium pulleys have six pin holes, so I suspect that I'll have two groups of six. I have yet to come up (...) (20 years ago, 2-Jun-04, to lugnet.technic)
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| | Re: SSClagorpion - Compressor
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(...) ... (...) That's what I was trying to say above. Sometimes, I think faster than I type, so all the details don't make it to my fingers... Yes, adding pistons at various angles will help even out the "work" required. So, 2 large pistions at 180 (...) (20 years ago, 2-Jun-04, to lugnet.technic)
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| | Re: SSClagorpion - Compressor
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(...) Hi Benton, In my experience small pistons do not control switches very well. They only produce 1/4 the force a large piston does. I've made one small piston walker (URL) . It uses two pistons per switch, and the switches were chosen (...) (20 years ago, 2-Jun-04, to lugnet.technic)
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| | Re: SSClagorpion - Compressor
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(...) One thing not represented in your calculations is time. Compressing one large pump takes more force than it takes to compress one small pump. With six small pumps seperated by 60 degress of phase. We can compress/expand six small pumps in the (...) (20 years ago, 2-Jun-04, to lugnet.technic)
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| | Re: SSClagorpion - Compressor
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(...) Ok, so my co-worker (with a degree in physics) said (after many calculations) that the Work is directly related to the Volume. Assuming 6 small pistons pump the same volume as 1 large piston, it will take the same amount of work. Keep in mind, (...) (20 years ago, 2-Jun-04, to lugnet.technic)
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| | Re: SSClagorpion - Compressor
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Often, at work on Friday afternoon, we have informal discussions about stuff completely unrelated to work. This morning, I stood up and looked over my cube walls (not hard, they're only 4 ft tall) and said I had a question. I didn't get much (...) (20 years ago, 2-Jun-04, to lugnet.technic)
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| | Re: SSClagorpion - Compressor
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Are you going to make sure that all your control logic is done with small pistons? That would seem to save a lot of air, and thus perhaps also speed the system up quite a bit. (20 years ago, 2-Jun-04, to lugnet.technic)
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| | Re: SSClagorpion - Compressor
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(...) Not necessarily. If they're compressing in a rotating series, your output at any given moment is much smaller than if they were going off all at the same time, and the more positions you can get in the series, the steadier your stream of (...) (20 years ago, 2-Jun-04, to lugnet.technic)
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| | Re: SSClagorpion - Compressor
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(...) Well that depends on how they're routed down the line. If they all pass through a single hose at any point, bang goes your bandwidth. ROSCO (20 years ago, 2-Jun-04, to lugnet.technic)
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| | Re: SSClagorpion - Compressor
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I finally had some LEGO time. Given the rate that RC Racer motors suck up current, Using two pumps with two motors and two battery packs, is about the best I can do. I did some measuring and calculating (only outer diameters :^( A large piston has (...) (20 years ago, 1-Jun-04, to lugnet.technic)
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| | Re: LEGO on TechTV
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(...) I'm not sure how well this will work. I just spoke with them, and in addition to the segment, the robots will be playing against people (staff & audience) during the entire show. How big is a one hour show, when converted to mpeg? :) Steve (...) (20 years ago, 1-Jun-04, to lugnet.mediawatch, lugnet.robotics, lugnet.technic)
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| | Re: Motor-powered transmission
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Tiago, For the steering, I am thinking that you should use a Touch sensor to detect when the steering is center. Attach something to the rack that will depress the touch sensor when the rack is centered. If you need to detect the turn rate (how far (...) (20 years ago, 1-Jun-04, to lugnet.robotics, lugnet.technic)
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| | Motor-powered transmission
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Hi everyone, I´m trying to build a LEGO Mindstorms car with a motor-powered transmission. I only want two or three gears, nothing too much complex for the start. I builded the transmission from the chapter 14 of the book "Building Robots with LEGO (...) (20 years ago, 31-May-04, to lugnet.robotics, lugnet.technic)
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| | New part # for new pneumatic switch?
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I just found out on Bricklink, that our loved (and hated) new studless pneumatic switch (URL) may have a new part number>. Just passing this on. Keith (20 years ago, 30-May-04, to lugnet.technic, FTX)
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| | Re: TJ, start the engines of your R 996...
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Hi Beat, Very nice model and very well photography! This truck is in its element in the quary. Do you have more than one copy of the backhoe loader or did you order some extra yellow hubs? I like the shape of the tipper body. Most times you start (...) (20 years ago, 30-May-04, to lugnet.technic, lugnet.modelteam, FTX)
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| | Re: LEGO on TechTV
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(...) Congratulations Steve... I also would be very happy if someone can video the slot for the web.... our TechTV is being cut on (grrrr) June 7th :( Apparently it has changed hands and the new owners have decided not to show it internationally. I (...) (20 years ago, 28-May-04, to lugnet.mediawatch, lugnet.robotics, lugnet.technic)
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