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Technic, Gear Timing Wheel 8 Tooth
http://www.bricklink.com/catalogItem.asp?P=x480
I've never understood what these parts where good for. Can anyone enlighten
me? I just had to buy a bunch of them from bricklink so that I could be
stocked on them, but I do not understand their use. Perhaps they can be
used with a light sensor, or perhaps they can be used as a knob to be turned
"by hand", but other than that I would like to know common uses for them and
the reason why they seem to be priced at a premium. Anyone care to throw in
their two cents?
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In lugnet.technic, Dan Berladyn wrote:
> Technic, Gear Timing Wheel 8 Tooth
>
> http://www.bricklink.com/catalogItem.asp?P=x480
>
>
> I've never understood what these parts where good for. Can anyone enlighten
> me? I just had to buy a bunch of them from bricklink so that I could be
> stocked on them, but I do not understand their use. Perhaps they can be
> used with a light sensor, or perhaps they can be used as a knob to be turned
> "by hand", but other than that I would like to know common uses for them and
> the reason why they seem to be priced at a premium. Anyone care to throw in
> their two cents?
A lot of space and mecha builders use them to make guns which might explain the
price.
Tim
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In lugnet.technic, Dan Berladyn wrote:
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Technic, Gear Timing Wheel 8 Tooth
http://www.bricklink.com/catalogItem.asp?P=x480
I’ve never understood what these parts where good for. Can anyone enlighten
me? I just had to buy a bunch of them from bricklink so that I could be
stocked on them, but I do not understand their use. Perhaps they can be
used with a light sensor, or perhaps they can be used as a knob to be turned
“by hand”, but other than that I would like to know common uses for them and
the reason why they seem to be priced at a premium. Anyone care to throw in
their two cents?
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It was introduced in 1997 in 8479 Barcode
Multi-Set, which you programmed with barcodes. It wasn’t used again until 2003.
http://www.peeron.com/inv/parts/x480
In the LEGO
Education Team Challenge set it is used with a light sensor to create a
rotation sensor.
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Thank you for that information. I took a look through several pictures of
a 8479 Barcode Multi-Set, I wanted to see how the Timing Wheel was used.
While doing so I came up with the idea of using a Touch Sensor with the
Timing Wheel. This works so well I am almost certain that this is where the
Timing Wheel had it's origins. Using the Timing Wheel with a Light Sensor
seems to work ok aswell, but the output values appear hardly
distinguishable.
Again, thanks for the replies.
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In lugnet.technic, Dan Berladyn wrote:
> Thank you for that information. I took a look through several pictures of
> a 8479 Barcode Multi-Set, I wanted to see how the Timing Wheel was used.
> While doing so I came up with the idea of using a Touch Sensor with the
> Timing Wheel. This works so well I am almost certain that this is where the
> Timing Wheel had it's origins. Using the Timing Wheel with a Light Sensor
> seems to work ok aswell, but the output values appear hardly
> distinguishable.
>
> Again, thanks for the replies.
Following on from the use of the 8-tooth timing wheel in the 8479 bar code
truck, which varied the rev sound, I used a 4-lobe Technic Knob Wheel
http://www.bricklink.com/catalogItem.asp?P=32072 with a touch sensor connected
to a bar code unit to produce a 'chuff' sound for a large scale steam engine
(approximately 1:8.4 scale of a narrow-gauge engine), with four chuffs per wheel
revolution. A second bar code unit detected the buffer touch sensors touching
the end stop in order to stop, pause and reverse the drive motor.
At first I thought the 8-tooth timing wheel might not move a touch sensor by
enough to be useful, so I kept it for the bar code unit's light sensor, but I
might give it a try with a touch sensor in another application.
8-tooth timing wheels are also very useful for holding eight 3.2mm-thick round
parts. I've tried them with flex tubing and also the 8 optic fibres of the unit
from the space shuttle.
Mark
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