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RM-N1 - Planetary Geared Motors - Nano Class |
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These Nano-sized motors, with 25:1 planetary gear reduction, are really powerful for their extremely small size. They are designed for Nano-class robot competitions, where a width restriction of 25mm is enforced.
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3D Designers Here is an approximate 3D model of the motor. You will need to download AutoDesk's viewing software to Dynamically view the model. You can also download the 3D idrop block into an ACAD drawing.
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These tiny motors are only 20mm in total length length (21mm with cables) and 6mm in diameter. They are ideally suited for Nano class robot competitions. It is designed for 3V nominal operation, giving 1200RPM drawing 100mA. At stall, it offers over 20gm*cm of torque!
(Click to zoom) Miniature Lego Motors Two geared motors can be easily connected directly to LEGO robot wheels, simply using the grooved shaft. designed for a 3mm diameter rubber belt drive. This produces are really simple Micro LEGO robot!
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Using Nano Motors with MEGAbitty:
When the motors are being driven by MEGAbitty using PWM, they can get rather hot.
There are some tricks to improve the situation -- such as sacrificing one bit of PWM resolution to double the drive frequency helps; adding some series inductance helps (see Yahoo group for example); and it is possible to swap the Enable and PWM lines in software if you're careful about what duty cycles you use.
When stalled the motors drain a lot of power, so take care not to exceed the specifications defined in the MEGAbitty manual.
Please read the MEGAbitty Forum messages on ideas on how to use small motors with the MEGAbitty controller board. There are many good ideas available.. http://groups.yahoo.com/group/megabitty/
Microelectromachinical systems (MEMS) & Nanotechnology The terms 'Nanorobotics' and 'Microrobotics' that are referred to on this website, are used in the context of robot competitions; which should not be confused with the terms applied to microscopic technology.
This article discusses nanotechnology, nanoscience, and conjectured "molecular nanotechnology."
Courtesy Sandia National Laboratories, SUMMiTTM Technologies, www.mems.sandia.gov Note that one nanometer equals one thousandth of a micrometer or one millionth of a millimeter!! ...now that's small !
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