| | Re: High Failure Rate of New Type 9V Geared Motor
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(...) I sent Nathanael Kuipers an email regarding the motors and asked him to forward it to the proper person. Do you think it is excessive torque, excessive use, or just a bad piece design that causes this problem? Nathan (19 years ago, 21-Oct-05, to lugnet.robotics, lugnet.technic)
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| | Re: Idea Books 8888 and 8889
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(...) Very interesting. Thanks! Keep em coming! (19 years ago, 21-Oct-05, to lugnet.technic, FTX)
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| | Re: Gray code vs. Binary
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(...) Haha! I've found a better way to do it, and a better drawing :-) Take my Pick and Place robot circuit: (URL) out the Elbow pistons and switch and connect the Elbow piston inputs to the Wrist piston instead (effectively draw the horozontal (...) (19 years ago, 20-Oct-05, to lugnet.technic)
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| | Re: Gray code vs. Binary
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(...) Hi Mark, You are right. I've had the wrong term in my head all this time. Gray code is not what I was thinking about I guess...... I'll have to go study Gray code better, and then study your descriptions. Man I wish you had a scanner and could (...) (19 years ago, 20-Oct-05, to lugnet.technic)
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| | Re: Gray code vs. Binary
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(...) Hi Kev, I think the cheapest way to do 3 or 4-bit binary with pneumatics would be to use gray code and convert it. Gray code always changes the least significant bit possible in order to achieve a change to a new state, so there will always be (...) (19 years ago, 20-Oct-05, to lugnet.technic)
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| | Re: Idea Books 8888 and 8889
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When I was approx. 16 years, I built (URL) this> (book 8889, pages 38-41). Lousy picture, I know (my dad didn't want me to take a picture myself). Trying to rebuild something without building instructions was always more challenging... ;-) If I (...) (19 years ago, 20-Oct-05, to lugnet.technic, FTX)
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| | Gray code vs. Binary
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To all those pneumatic gurus..... The classic pneumatic timing circuit made with one switch per piston changes state following gray code (i.e. only one piston changes at a time). This means that a two piston timer goes through these states: (...) (19 years ago, 20-Oct-05, to lugnet.technic)
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| | Re: Idea Books 8888 and 8889
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(...) I really wanted to use the 4.5V motor from [LEGOSet 8700] since the motor is near-identical to 870's, but the battery box from that set is cylindrical and very long, so it's doubtful I could make it fit in there. However, if I decide to use 9V (...) (19 years ago, 20-Oct-05, to lugnet.technic, FTX)
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| | Re: Idea Books 8888 and 8889
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From memory the crane was a bit of a clunker with 4.5v. Let us know how it goes with 9volts in the back ! Steve (19 years ago, 20-Oct-05, to lugnet.technic)
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| | Re: High Failure Rate of New Type 9V Geared Motor
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(...) Thanks! No, these motors were only used for FLL type challenges, not in fast RC cars. I can submit the bad motors for *CSI* and 'autopsy' if need be. C S Soh (19 years ago, 20-Oct-05, to lugnet.robotics, lugnet.technic)
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