ESC with built-in receiver - interesting?

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EddieJ
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Re: ESC with built-in receiver - interesting?

Post by EddieJ »

Testing this with the new bot at the moment, the brushed drive all works great. Cant seem to get the Brushless Weapon to work though. I tried just about everything, aside from desoldering it and testing the ESC - which is what ill do tomorrow :P

A few questions and feedback:
Wep 2 PWM is default to channel 3 or 4? Just checking!
The PWM weapon 2 and 3 dont need to be activated in any way?
Is there a preset "dead zone" to the throttle and steering? Or is it perfectly linear? (im assigning my own curves)
For me, the channel mapping was different to the manual. I have no idea why. I dont like the electronics side :lol: could just be me!
The config commands on the "overview" page of the manual dont list 8 or 9 pulses.
My weapon throttle range i set 0-100. Is this OK? I found it worked well on other builds. Or should i have left default at -100 to 100?
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Kyro
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Re: ESC with built-in receiver - interesting?

Post by Kyro »

iirc, the default setting within the esc is for the weapon channel to be set to the 3rd brushed channel... there is a number of pulses (i think 8 or 9 but dont hold me to it) that switches the 3rd brushed channel with w1 (left pad if both are located at the top of the board with antenna board pointing right)
this is the channel i am using for my spinner.

if you have the older firmware, without a reflash you would need to mix a couple of channels on your tx to achieve a simmilar thing...

my mix is:
mix 1
on
master: ch3
slave: ch6
then tune mixes and offset to taste (note this is the mix for my lift and grab and im pretty sure its wired the same but it may be wrong, my spinner has the newer firmware in and i used the pulses to switch channels)

hopefully this helps
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MarkR
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Re: ESC with built-in receiver - interesting?

Post by MarkR »

Hi,

The weapon2 channel (you probably want to use that) is channel4 by default on most of the boards I've made.

That means usually the left-hand stick left/right for the weapon speed, which is not ideal. You can swap them with the 8-pulses config command (see the doc) and then the brushless weapon will be on channel 3, which is ideal as that's the axis with no spring.

I'm not an expert on the brushless ESCs, I've never used one in an actual robot (yet) but the ones I have seem to require a range of throttle movement before they will arm, like, zero, 50%, zero, then it beeps and is armed.

So try the swap command, then use the throttle stick, try slowly up, then down, then up again, and it should spin up, or at least try to.

There is a preset dead zone on the drive and steering. The servo outputs are perfectly linear and tries to duplicate the input as close as it can.
Robots: Betsie - RaspberryPi controlled flipper bot with gyro stablisation - too clever for her own good?
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MarkR
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Re: ESC with built-in receiver - interesting?

Post by MarkR »

Oh yes - one more thing - the servo pulses outputs (for brushless too) - won't activate when in config mode. So all you have to do is drive the robot (very slightly) and you should be able to start the spinner (also do any arming procedure required by your esc).

When you turn the tx off, it will stop sending servo pulses so the brushless esc will typically shutdown and disarm, and you'll need to repeat the arming procedure. At least, that's what my ones do, I haven't tested a wide range.
Robots: Betsie - RaspberryPi controlled flipper bot with gyro stablisation - too clever for her own good?
Stacie - tidy flipper; 4wd driven by hair bands

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