absolute beginners questions

[tronicgr]

If you noticed all the USB type controller support only one motor, you are right. There are no products that support more than one motor. There are issues of the USB latency and the amount of data needed to be transferred for more than one motor.

Unless you do it yourself don't expect big companies to make it easy for you. They profit more if you buy their products in pair, even if is physically capable of driving more than one motor in some cases.

I personally overcame this by using a dedicated USB chip (FT232RL) for fast communications (up to 3Mbps) leaving the microcontroller with only motor control related tasks instead of spending time on USB transfer functions.

Thanos

[UncleDirt]

Ok. Good statement from your side.

[UncleDirt]

Also, if you are going to look at a basic frame, 12v motors will MORE than do the job. I use these big worm gear motors http://www.motiondynamics.com.au/worm-d ... orque.html

To be honest i´ve seen these Motors before. But 150$ for the delivery to Germany is way too much.
But i found these here at ebay: http://www.ebay.de/itm/DC-Motor-ZYT90-1 ... 58913c7a02
Can i use them with a gearbox?
Main Points:

Rated Voltage: 12v

NoLoad Speed: 5000RPM

Current (Peak): 27.8A

Nominal Power: 250W

D5-MA21-030

Complete Datasheet http://www.motioncontrolproducts.com/pd ... -motor.pdf

Is there any problems to use them with with the jrk 12v12?

[motiondave]

I looked at those motors, unless you are going to put them on a pulley system, you need a gearbox on the end of them. http://www.ebay.de/itm/25-1-MCP-4-Gearb ... 19c9478c8f , there it is.
Those motors list a peak current of 27 amps, but what is stall current. If 27 amps is stall or close to it, you are right on track.
But otherwise the look fine to run off jrks.

With the jrks, I found that they will handle continuous big current, but really, nothing bigger than a 300 watt motor. They are usually about 16-20 amps rated, but with simulators, they are running almost always as stall, which , by a rule of thumb (depending on thumb size ), is double rated.
So in this case, my motors are running at 30-34 amps most of the time. Mind you I've had them at nearly 38 amps big spike current.

My jrks handle 30 + amps no problem continuous, I have a heatsink and a fan cooling them, that and some settings changes in jrk utility (thanks bobbuilt).