 | | Re: Mechanical pneumatic piston —Kevin L. Clague
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| | | (...) The problem is that you would need a mold for each unique part that is cut. If the number of rotations/divided by the length does not give you length that is repeatable using quarter turns you need more than one mold. This is *not* good (very (...) (21 years ago, 10-Oct-03, to lugnet.robotics)
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| | | | | Re: Mechanical pneumatic piston —Mike Thorn
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| | | | At 10:26 AM 10/10/2003, Kevin Clague uttered the following: (...) I'm not sure my brain can wrap itself around that, but I'll keep trying. In the meantime, I'll take your word for it that it won't work. :) Sometimes you LUGNET fellows are a little (...) (21 years ago, 11-Oct-03, to lugnet.robotics)
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| | | | | | Re: Mechanical pneumatic piston —Kevin L. Clague
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| | | | (...) I overspeaketh...... Let me try again. The gear has to be an integer multiple of 1/4 turns because the the gear can fit on an axle four different ways. If it is more or less than 1/4 turns (1/3), then things won't line up when you butt them up (...) (21 years ago, 11-Oct-03, to lugnet.robotics)
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| | | | | | Re: Mechanical pneumatic piston —Mike Thorn
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| | | | (...) Okay, I understand better now. So unless you have two worms made consecutively, you're stuck. Thanks! :) ~Mike (21 years ago, 11-Oct-03, to lugnet.robotics)
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| | | | | | Re: Mechanical pneumatic piston —Mark H. Near
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| | | | Restating for clarity, (I hope) I think the issue is the + shaped central hole. If you mounted these worm gears on an axle which requires them to be mounted at 0 (180), 45, 90, and 135, then of course you can't turn the gears anywhich way to line up (...) (21 years ago, 11-Oct-03, to lugnet.robotics)
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| | | | | | Re: Mechanical pneumatic piston —Gus Jansson
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| | | | | I have given this question some thought in the past and I came up with a theory. First of all some gear geometry background. Lego gears have 8 teeth per Lego unit (aka stud) of pitch diameter, the effective diameter to where the gears mesh. Using (...) (21 years ago, 12-Oct-03, to lugnet.robotics)
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| | | | | | | Re: Mechanical pneumatic piston —Ross Crawford
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| | | | | | (...) Very nice analysis! All seems perfectly logical to me! (...) The other problem is not having an axle long enough to put them on. So I connected them together with axles butting each other about halfway through each worm gear. And with 14 worm (...) (21 years ago, 12-Oct-03, to lugnet.robotics)
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| | | | | | Re: Mechanical pneumatic piston —Juergen Stuber
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| | | | (...) With four orientations that would be 0, 90, 180 and 270. However, you could get away with eight if you have one side of the worm gear at 0, 90, 180 and 270 and the other at 45, 135, 225 and 315, you'd just need to turn around every other gear (...) (21 years ago, 12-Oct-03, to lugnet.robotics)
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| | | | | | Re: Mechanical pneumatic piston —Mike Fusion
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| | | | sorry it took me so long to reply, working with remote administration and moving and other stuff.... anyways it has been my opinion that using the bushings has a tendency to slide when there is a slightly significany ammount of resistance involved. (...) (21 years ago, 28-Oct-03, to lugnet.robotics)
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