A satellite image will be provided. The software guys would know more specifics but the current plan is some kind of SLAM combining data from cameras, encoders, LIDAR and an IMU.
My weight comparsion was perhaps an exaggeration but not by that much.
The NPC motor has a peak power of 2800W. This AXI motor doesn't list any curves but the peak current draw is 4000W and if I do the math with their minimum efficiency it will be ~2700W.
http://www.modelmotors.cz/index.php?...14&line= GOLD
The AXI motor weights 2.2lb. The brushed motor also runs at ~60% efficiency while the AXI can maintain 85%+. Regardless of the exact numbers, the difference is huge. AXI is one of the most expensive brands, but similar motors can be had for <100$ if so desired.
I've thought a bit about my options and the chances are we will try to roll our own and fall back to the roboteq controller if it doesn't work out. I'll skip rotary encoders and just add hall sensors to the AXI motor since we don't need high resolution and it makes the motors compatible with any sensored controller.
There are laws of physics, useful rules of thumb, and cold hard economics that come into play to be sure but at it's core Engineering is Art. For these artists, there is no substute for the sound engineering judgement.
- Joe Johnson [more] 
09-07-2011, 17:52
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