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In lugnet.org.ca.rtltoronto, Ray Sanders wrote:
> The longer the axle is... the more likely it would be to twist under torque. I
> wonder how TLC has approached that issue.. perhaps a new plastic ?
I tend to design assemblies with long shafts in a method that is analogous to
how high power electricity is transmited over long lines.
If you think about torque as amps and voltage as speed, it's just like that.
Shafts don't (generally) care about how fast you can spin them*, but there is a
limit on torque because you will get twist. So for any system where I have a
long distance to travel with a shaft, I make sure I don't provide any speed
reduction from the drive motor until I reach the destination where the torque is
required.
So for, say, a robot arm with a joint at the end, and the motor at the other
end, I'd have a long axle from the motor down to the end, then do the gear
reduction, right at the axis.
High power electricity is stepped up to extremly high voltages for long
transmission, because line loss is less at higher voltages/lower amperages than
the other way around.
I think the 32 long axles were only really designed for the hockey game anyway?
Iain
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Message has 2 Replies:
 | | Re: 32 Long Axles
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| (...) It's the only application where it's shown up so far. There hasn't really been any real world model for a Technic set that really demanded such a long distance...the only one that comes to mind would be the tail rotor of a helicopter or for (...) (20 years ago, 10-Feb-05, to lugnet.org.ca.rtltoronto)
| | | Re: 32 Long Axles
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| (...) The other cool analogy that falls out of this is the synchronization of positioning or phase angle (for AC power systems). If you have a long shaft with a gear on each end, and you index one tooth on each gear, the rotational position reletive (...) (20 years ago, 11-Feb-05, to lugnet.org.ca.rtltoronto)
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Message is in Reply To:
| | Re: 32 Long Axles
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| (...) The longer the axle is... the more likely it would be to twist under torque. I wonder how TLC has approached that issue.. perhaps a new plastic ? Ray (20 years ago, 10-Feb-05, to lugnet.org.ca.rtltoronto)
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