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Quicktime (781K)
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Torsional Ratcheting Actuator
The torsional ratcheting actuator (TRA) is running at a slow, constant speed. By visually following the dot on the outer ring which starts out at 3 o'clock position, the ring's rotation can be seen.
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Quicktime (336K)
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Torsional Ratcheting Actuator Close-up
In this close-up, the camera pans across the lower half of the TRA device. Again, it is running slowly so its motion is clearly visible.
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Quicktime (781K)
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Torsional Ratcheting Actuator
As the camera finishes panning to the bottom right corner of the TRA, you can see our Sandia National Laboratories Thunderbird Logo. To put the size of the TRA in perspective, it is approximately one-third the size of our comb drive microengines.
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Quicktime (780K)
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Torsional Ratcheting Actuator
In this video and the next, the TRA is put through its paces; the TRA's speed is doubled at regular intervals – from a 1 Hz drive signal up to 640 Hz – then it is slowed down again.
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Quicktime (780K)
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Torsional Ratcheting Actuator
Please note that the dot on the outer ring is moving almost too fast to see! We have operated the TRA with drive signals in the low kHz range, and will be able to increase that still further with future refinements.
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Quicktime (781K)
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Torsional Ratcheting Actuator Pawl Close-up
In this close-up of the ratcheting pawl (with black dot) operating at low speed, it is possible to see that with each cycle it pulls one tooth on the outer ring.
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Quicktime (574K)
AVI (1206K)
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Rotary Motor
The rotary motor is operating at various speeds in this video.
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Quicktime (811K)
AVI (989K)
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Rotary Motor
In this video, the camera pans to the center of the rotary motor and then out to its edge.
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Quicktime (600K)
AVI (766K)
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A Newer Version of our Rotary Motor
The rotary motor operating at high speed.
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Quicktime (664K)
AVI (914K)
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A Newer Version of our Rotary Motor
The rotary motor operating at medium speed.
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Quicktime (664K)
AVI (760K)
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A Newer Version of our Rotary Motor
The rotary motor operating at slow speed.
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Quicktime (656K)
AVI (756K)
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Wedge Indexing Motor (Slow)
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Quicktime (1588K)
AVI (526K)
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Wedge Indexing Motor (Medium)
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