 | | Re: 9V batery box (6 AA) - pressed too much
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(...) I wouldn't call it elegant, but it works. I used a pair of those egg shaped cams set at right angles on the same shaft, one over each battery box button. With both cams at 45 degs, neither button is pressed. With + and - 45 deg drive to the (...) (19 years ago, 7-Oct-05, to lugnet.technic)
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| | Re: 9V batery box (6 AA) - pressed too much
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(...) Thanks Mark. Could you expand on : "its not designed to be used that way" I actually discovered this when I tried to replace the red button with a dual set polarity switch for these robot games: (URL) simple idea was to use a beam along one (...) (19 years ago, 7-Oct-05, to lugnet.technic)
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| | Re: 9V batery box (6 AA) - pressed too much
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(...) The battery box switch is designed so that if you press on both sides at once, nothing will happen. The switch deliberately short circuits the motor output when neither side is pressed. If you have one side clicked 'on' and gently press the (...) (19 years ago, 7-Oct-05, to lugnet.technic)
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| | Re: 9V batery box (6 AA) - pressed too much
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(...) ...and looks like this one inside the 2838 motor: (URL) (19 years ago, 7-Oct-05, to lugnet.technic)
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| | Re: 9V batery box (6 AA) - pressed too much
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(...) The current limiter is a small disk located near the end of one of the top two batteries, and positioned vertically. Steve (19 years ago, 6-Oct-05, to lugnet.technic)
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| | Re: 9V batery box (6 AA) - pressed too much
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(...) no, this problem is more sinister, in my experiments, I only had one unloaded motor directly connected to the battery box. I do not feel using this simple set up, i overloaded the limiter. And to answer your first question YES, under normal (...) (19 years ago, 6-Oct-05, to lugnet.technic)
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| | Re: Hex565 - one leg at at time pneumatic hexapod
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(...) <snip> (...) How does it cope with uneven ground? It would be interesting to see a vid of it pulling itself over rough and bumpy terrain. (...) Ah - some kind of chicken walker. The thing that interests me most about pneumatic walkers is that (...) (19 years ago, 6-Oct-05, to lugnet.technic, lugnet.robotics)
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| | Re: 9V batery box (6 AA) - pressed too much
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(...) Hi Chris, If you just leave the motor on without pressing the red button does it also stop? The battery boxes have a built in current limiter that will stop current flow if you are drawing too much power. Could that be the problem? Kev (19 years ago, 6-Oct-05, to lugnet.technic)
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| | Re: Hex565 - one leg at at time pneumatic hexapod
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(...) <snip> (...) I find it pleasing to watch also. It is very decisive about its stepping. When legs are moving individually, they do so realtively quickly, and then they all move at once, you see a definite lurch in body location. There is (...) (19 years ago, 6-Oct-05, to lugnet.technic, lugnet.robotics)
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| | Re: Technic question: how to connect 2 technic beams
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(...) The offset cam will be too tight. I believe Zoltan Schuster and Dennis Bossman have the solution. Turn one beam upsidedown and leave the other right side up This will make the verticle distance between the holes exactly the 45 degree diagonal (...) (19 years ago, 6-Oct-05, to lugnet.technic, FTX)
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| | 9V batery box (6 AA) - pressed too much
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At the last robot contest, I discovered that if I press down on either side of the battery box red switch, the power stops. It is hard to put into words. If you hook up a motor to this battery box: (URL) press the red button, the motor spins. if (...) (19 years ago, 6-Oct-05, to lugnet.technic)
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| | Re: Technic question: how to connect 2 technic beams
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(...) Thanks for your suggestions. I have a number of restrictions for this specific design... but have been wondering in general the best way. (So far I think Mark has the best suggestion using an offset cam). For this specific project I am (...) (19 years ago, 6-Oct-05, to lugnet.technic, FTX)
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| | Re: Technic question: how to connect 2 technic beams
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(...) Do the two beams need to be studded? Bracing two studless beams could be a lot easier, not as high either. If you can show us what you are trying to fit this into, I'm sure someone here will come up with the solution. :) Cheers, Chris. (19 years ago, 6-Oct-05, to lugnet.technic)
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| | Re: Hex565 - one leg at at time pneumatic hexapod
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(...) That is a joy to watch. Even if it is slower than some other gait, it is very interesting to watch. I have vaguely followed your pneumatic threads, watching the cool diagrams and devices, but I will admit you lost me a while back with this. (...) (19 years ago, 5-Oct-05, to lugnet.technic, lugnet.robotics)
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| | Re: Technic question: how to connect 2 technic beams
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(...) How many studs of overlap can you have? Also, how much space can you have on the sides? A tacky way to solve the problem would be to run a string through the holes in a spiral type fasion and then tie the ends together. Hey; no one can say it (...) (19 years ago, 5-Oct-05, to lugnet.technic, FTX)
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| | Re: Technic question: how to connect 2 technic beams
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(...) You could try a cam with an offset of 1 hole sideways along the beams - the distance between the offset holes is about 1.5L (12mm). Use the hole in the middle of the large end of the cam as well as the hole at the small end. You probably need (...) (19 years ago, 5-Oct-05, to lugnet.technic, FTX)
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| | Re: Technic question: how to connect 2 technic beams
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(...) Thanks for the ideas... however I am constrained to a height of 2 beams. This height restriction is what is causing me grief as I can not space the beams or add above/below to use the liftarms. Jeff (19 years ago, 5-Oct-05, to lugnet.technic, FTX)
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| | Re: Usage of hose 3mm diameter.
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(...) I tried fitting a 3mm flexible hose into a normal hose, but without success! It might be possible but would take longer than fitting a 3mm rigid flex tube into a normal hose. The 3mm hose breaks easily if it is stretched over a 3mm flex tube - (...) (19 years ago, 5-Oct-05, to lugnet.technic)
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| | Re: Technic question: how to connect 2 technic beams
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(...) If you have no plates, put four bricks on top of each other between the beams and use a 7L liftarm rather than the 5L one pictured above. Mark (19 years ago, 5-Oct-05, to lugnet.technic, FTX)
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| | Usage of hose 3mm diameter.
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I'm wondering if this hose can be safely used in pneumatic switching circuits or if it's thin inside diameter would restrict airflow somewhat. I've got an idea where I might be tight on space around the valves, so I wondered to myself if 3mm hose is (...) (19 years ago, 5-Oct-05, to lugnet.technic)
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