RobotWars101

Other than taking my finger off the throttle I have no way of stopping these, or their weapons, via a button on my controller. Will this be acceptable, I am not clear on the rules here. The failsafe is simple - if the robot loses signal (e.g. turn off the transmitter) then it should stop. This appl...

I think you have to be a bit careful overvolting steppers because the way stepper drivers behave, they pull current when the motor is not moving, the "holding current", which can possibly overheat the motor quite quickly. Of course that might be fixable in software / firmware, or as some o...

You're very welcome. The weight saving may not sound like a lot, but used correctly it can make a big difference. For instance, my first candidate for these is Vampire, saving 2.8g. I'm planning to use this extra weight to lengthen the bar, moving from its current 13cm, 17g weapon to a 15cm 20g one...

YES! Definitely build a mecanum wheel bot! Of course it will be necessary to drive all four wheels independently, ideally with either stepper motors or shaft encoders, so that the speed can be set precisely. I've no idea where small/light mecanum wheels can be got, I looked (briefly) at 3d printing ...

Great stuff, the weight saving is modest but it sounds like they'll work just fine.

Thanks for the write-up.

Mark

George, your robots rock!

Also, did you get any N10s? Are they any good? I see a few on Aliexpress etc.

Well done for fixing it, is there any possibility of getting uploaded images back?

red touching black=bad. The easiest test to do on a multimeter, is to measure the resistance. If it's an "auto range" meter, then you need to understand the display, if not, set it to the correct range, which will be something like 100 Ohms. A N20 motor will typically have, when not moving...

Ok, it is super difficult to get info about the MX2020b IC. It is made by Chinese company sinotech, whose web site http://www.mixic.com.cn/ blocks access from outside China. There is a 1688 (Chinese ebay thing) page which contains some info here: https://detail.1688.com/offer/596031371053.html LCSC ...

If you know what chip it is, then it looks replaceable, if no tracks on the board are damaged. The problem I always had with Dasmikros was the tracks lifting and making a short. Personally I'd suspect a short circuit somewhere. If your motors aren't shorted now, perhaps they were briefly during your...