Small ESCs outside the UK

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Shakey
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Re: Small ESCs outside the UK

Post by Shakey » Mon Apr 15, 2019 4:40 pm

Just to clarify a bit:

When it comes to RC ESC's there are 2 kinds of brake talked about.

One is the motor brake (sometimes called drag brake) like GeorgeR says and is a very desirable feature in fighting robots, I dislike driving robots without it. It just makes it so much more controllable. This kind of brake means the motor is always trying to stop rather than coast and keep going. This is implemented in the way the ESC powers the motor.

Outside the world of combat robots a lot of RC stuff considers the other kind of brake. Which is what Lima is talking about where going from forwards to reverse on the stick is actually a stop command rather than reverse. You have to re-centre and then put the stick in reverse again to go backwards (as a side note I drove a feather with this for a long while, it was horrible :P ).

I did put up a short guide on achieving braking with a das mikro a while back here: viewtopic.php?f=10&t=2504#p57290
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phlextro
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Re: Small ESCs outside the UK

Post by phlextro » Mon Apr 15, 2019 5:05 pm

Shakey wrote:
Mon Apr 15, 2019 4:40 pm
This is implemented in the way the ESC powers the motor.
Thanks for clarifying! Thats along the lines of what i thought i knew about Power Electronics. :)

Seems my best bet are the servo-boards, which should be fine, and while i wait for them, the ol' sabertooth will have to do!
EDIT: The endbots one though... thanks for the tip! :D

I guess shipping outside of the UK isnt getting any easier either with brexit and all?
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LimaHotel
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Re: Small ESCs outside the UK

Post by LimaHotel » Mon Apr 15, 2019 6:20 pm

I mean brexit has been delayed until October and if the last few years are anything to go by, I doubt anything's gonna happen then either.
Regarding the servo boards - there's been an update on them. If you look in the antweights sub forum, there's an ongoing discussion about them. Apparently they don't have a true dead zone (still giving 0.3a which is enough to turn an unloaded n20), and don't give full power to the n20s regardless of trim etc. So they might not be too good of a choice.
Still looking forwards to getting mine. I'll find something to use them on!
Another option I know people take is the arduino route, though I've never done that. I believe it's fairly space consuming? So possibly not what you're after.
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LimaHotel
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Re: Small ESCs outside the UK

Post by LimaHotel » Thu Apr 18, 2019 4:06 pm

A query on acquiring the 50ohm resistors for implementing braking on a non-braking esc like the DasMikro btw: uuuh yeah. That. Where do you guys get your resistors?
Jiggy Sawdust (Grabber)
Jammin' Good with Weird and Flippy (Rear-hinged Flipper)
The Pushbot from Mars (4wd Pushbot)

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