pic: Omniwheel Minibot

[AdamHeard]

Make sure the lipos you get can handle the potentially huge currents 2 CIMs would cause. Trying to draw too much from them can cause thermal runaway and fire.

In terms of size and weight, I think you'd get a more satisfying performance by switching to 550's or 775 sized motors as you can shave a lot of size and weight off, without a large power loss.

[Chris Endres]

I would have to agree with Adam; for this size, you wouldn't need that much power from two CIMs to move the weight of the bot.

[Scott Kozutsky]

Originally Posted by AdamHeard

Make sure the lipos you get can handle the potentially huge currents 2 CIMs would cause. Trying to draw too much from them can cause thermal runaway and fire.

In terms of size and weight, I think you'd get a more satisfying performance by switching to 550's or 775 sized motors as you can shave a lot of size and weight off, without a large power loss.

The reason I chose to go with CIMs is because it's actually cheaper and simpler than using those more sensible motors. The Cim motor isn't much more expensive than a 775 for instance but because of the lower speed and higher torque we don't need any additional stages and we don't need to buy either non-vex gears or versaplanetaries. Also, because it's so light I doubt we'll see the massive stall currents that CIMs are capable of.

I'm actually planning a WCD styled minibot that uses 500 series brushless motors (made out of 30mmx15mmx1.5mm alu extrusion, I need to practice my metric) so it will also fit the RS 550.

[mman1506]

Originally Posted by AdamHeard

In terms of size and weight, I think you'd get a more satisfying performance by switching to 550's or 775 sized motors as you can shave a lot of size and weight off, without a large power loss.

Additionally you have to look at its intended use. We regularly do demos for 6 hours without cool downs. The additional thermal mass will prevent over heating the motors.

[ekapalka]

I see you've got the rendering pretty well figured out. Could you share a bit about how it was done? It looks photorealistic :)

[mman1506]

Originally Posted by ekapalka

I see you've got the rendering pretty well figured out. Could you share a bit about how it was done? It looks photorealistic

I'm no expert but it was done in Solidworks photoview. Make sure perspective is on. I also added a spotlight to make things look a little more realistic.