ESC with built-in receiver - interesting?

All things antweight

Moderators: BeligerAnt, petec, administrator

User avatar
MarkR
Posts: 340
Joined: Mon Dec 18, 2017 12:46 pm
Location: Reading Hackspace
Contact:

Re: ESC with built-in receiver - interesting?

Post by MarkR »

minionhunter wrote:
Sun Feb 16, 2020 1:37 pm
What do people do if they have 6WD? Like real 6WD with 6 motors. I'm mean for the speed controller and I'm thinking about that white 6WD bot at AWS 49 that could go from driving in Super slow-mo to lightning quick instantly. Could you do that with yours or will it pull too many amps to have 3 N20 or 3 N10 motors on one channel? Is there a way to do that in an esc like this?
I don't think anyone uses 6 motors for Antweight, there are a few 6-wheelers (bee-bot?) and also "Axe of 8 wheels" and I think they all use some gears or linkeage so they can drive all the wheels on one side with a single motor.

Having 6xN20 motors would be a serious weight penalty, they weigh > 10 grams each.

Most N20 motors will stall at <0.7 amps on a 2S pack. You can of course get more power by running on a 3S pack or using a voltage boost device, but then run a risk of breaking the gearboxes (too much torque), or if stalled, overheating them. I'm running an over-volted N20 as a weapon motor on Betsie at about 14 volts, it wears the gearboxes quickly.
Robots: Betsie - RaspberryPi controlled flipper bot with gyro stablisation - too clever for her own good?
Stacie - tidy flipper; 4wd driven by hair bands

User avatar
MarkR
Posts: 340
Joined: Mon Dec 18, 2017 12:46 pm
Location: Reading Hackspace
Contact:

Re: ESC with built-in receiver - interesting?

Post by MarkR »

A minor status update, the current prototype is now close to the final form factor, I've made a few (minor) cock-ups in this design, but it was not final anyway. These will be fixed in the next respin.

It looks like it will probably work and drive 1.8 amps per channel, I need to do a lot more testing, I've not tried it with any other transmitters yet.

https://marksverbiage.blogspot.com/2020 ... speed.html

Image
Robots: Betsie - RaspberryPi controlled flipper bot with gyro stablisation - too clever for her own good?
Stacie - tidy flipper; 4wd driven by hair bands

TimPerry
Posts: 5
Joined: Thu Feb 07, 2019 2:10 pm

Re: ESC with built-in receiver - interesting?

Post by TimPerry »

This looks awesome. Currently use 2 endbots DESC for Villanelle and miniroll but at £40+ each I'd love a cheaper option!
Villanelle (Vert)
Dozer (pushbot)
Flippinbot (flipper)
Mini Roll (drum spinner)
Wedgie Wedgie (cluster)

minionhunter
Posts: 158
Joined: Fri Nov 04, 2016 5:36 pm

Re: ESC with built-in receiver - interesting?

Post by minionhunter »

MarkR wrote:
Mon Mar 16, 2020 5:37 pm
A minor status update, the current prototype is now close to the final form factor, I've made a few (minor) cock-ups in this design, but it was not final anyway. These will be fixed in the next respin.

It looks like it will probably work and drive 1.8 amps per channel, I need to do a lot more testing, I've not tried it with any other transmitters yet.

https://marksverbiage.blogspot.com/2020 ... speed.html

Image
I can't believe all you have packed into that Mark! It looks really amazing. It will make my rx purchases obsolete (as long as it can do the cheap flysky tx) buy I'm all ogling it right now.

User avatar
MarkR
Posts: 340
Joined: Mon Dec 18, 2017 12:46 pm
Location: Reading Hackspace
Contact:

Re: ESC with built-in receiver - interesting?

Post by MarkR »

I have no idea when/if it will get into production.

I am currently stuck at home, like everyone else. I'm tweaking the firmware. That is quite interesting, I have learnt how to write avr assembly language :)

I hope the Antweight robot scene will restart when it is possible!
Robots: Betsie - RaspberryPi controlled flipper bot with gyro stablisation - too clever for her own good?
Stacie - tidy flipper; 4wd driven by hair bands

User avatar
peterwaller
Posts: 3190
Joined: Fri Feb 15, 2002 12:00 am
Location: Aylesbury Bucks
Contact:

Re: ESC with built-in receiver - interesting?

Post by peterwaller »

Glad to hear I am not the only one using AVR assembler.

User avatar
MarkR
Posts: 340
Joined: Mon Dec 18, 2017 12:46 pm
Location: Reading Hackspace
Contact:

Re: ESC with built-in receiver - interesting?

Post by MarkR »

If you look carefully in the photograph, you can see the bodge wire. It is 3mm long. Oops :)
Robots: Betsie - RaspberryPi controlled flipper bot with gyro stablisation - too clever for her own good?
Stacie - tidy flipper; 4wd driven by hair bands

User avatar
MarkR
Posts: 340
Joined: Mon Dec 18, 2017 12:46 pm
Location: Reading Hackspace
Contact:

Re: ESC with built-in receiver - interesting?

Post by MarkR »

Further to recent updates, I've made a video:

https://youtu.be/dvAsTS2t9jo

I've got it to do telemetry. It gives the battery voltage and microcontroller temperature right now.
Robots: Betsie - RaspberryPi controlled flipper bot with gyro stablisation - too clever for her own good?
Stacie - tidy flipper; 4wd driven by hair bands

User avatar
MarkR
Posts: 340
Joined: Mon Dec 18, 2017 12:46 pm
Location: Reading Hackspace
Contact:

Re: ESC with built-in receiver - interesting?

Post by MarkR »

Ok, I've assembled the latest prototype.

It doesn't work. I don't know why. Making fine-pitch SMD without the right equipment is tricky (I have only basic stuff compared to the hackspace).

This time I don't think there is a design fault, just cack-handed assembly.

Render
Image
The real world.
Image
Robots: Betsie - RaspberryPi controlled flipper bot with gyro stablisation - too clever for her own good?
Stacie - tidy flipper; 4wd driven by hair bands

User avatar
Kyro
Posts: 380
Joined: Fri Jan 18, 2019 12:36 am

Re: ESC with built-in receiver - interesting?

Post by Kyro »

you can probably see better than me, but in your pic it looks like pins 7 and 8 on both R and L look like they are connected...

im just guessing that you have probably already looked into that though, but just in case...
Team Rocket
Esper(4wd flipper)
Mantis (4wd grab 'n' lift)
Dominus (Vert SPINNAAH)
Breakout(modular cluster)
Remembering Rex (antweight cassius)
Fennec (4wd flea) former world champion

Post Reply