10531 réponses à ce sujet

[firened]

~~perhaps you can lower the value in RCconfig->TX->COMMAND8->

and lower scalemax, max and clampmax.
i don't know if it's possible to have them asymetrical, meaning only limiting forward but not backwards.~~


oh actually it should be easier in HWconfig->OUTPUTS->n->OUTs-> and lower the high value for both motors, this should reduce forward but not backward speed. you'd need to adjust that value whenever you want full speed though.

[Hayrpey]

I followed the tuto but I can't activate the sound of the hat, it's necessary to upload the .wav?

[Mike118]

Yes there is many ways possible to configure the speed you want on a robot. There is also the basic way to reduce speed only for some kind of vigibot members. But what is asked is seems to be very specific and we don't have "standard options" matching with this requirement...

[OdorousWo1f]

ok ill mess around with this
thanks

[OdorousWo1f]

is there a way to control 2 servos via forward and backwards control?

[firened]

yes. just like the default minus motor driver that takes a servo pwm as input

[OdorousWo1f]

ah you just plug it in?

[firened]

you connect the servos the same way you would for camera pan and tilt servos (if possible separate from pi power source).
then it's just a question of configuration.

in the OUTPUTS you use ServoPWMs (best to copy config from default minus config, hw config & rc config)

[OdorousWo1f]

i'm not using a HAT so what pin do I connect the PWM to

[Mike118]

Choose whatever pins are most suitable for you then we will help you to configure if needed. By default gpio 26 and 27 are used and can drive a servo.
@OdorousWo1f keep in mind that press shift to increase speed is only working when using keyboard to control the robot. It is not changing the joystick behaviour.

[firened]

.

WalterJakob has this short battery extension cable, i removed it, now it can no longer be powered off without having to unscrew the robot at the moment. it improved it perhaps a little i think.

test 2) battery plugged into robot, robot powered on. i sliced open the insulation to measure voltage as close to the battery as possible, it appears that the battery voltage indeed is only 3.82V (with all robot load) right after disconnecting from charger (see both pictures). will make some tests, perhaps the batteries are too cheap.

[Mike118]

Wait where do you manage to mesure 4.15v ? Is it while charging ?

[firened]

test 1) was like this: robot was on charger for multiple days, then i shut down the robot, completely disconnected the battery, and measured the open circuit terminal voltage on the battery. it was 4.15V.
i improved my wording of test 2), it was not clear the way i wrote it.

[Mike118]

So while not charging far from battery you have 4.15v and near battery you have 3.82V ... This is very strange ... voltage should not increase the further you are from the battery while not charging...

[firened]

oh no sorry. my wording is terrible.
test 2 is while robot powered on. i added that detail now.

[Mike118]

Was that a battery I shipped to you?
Now that I undersrand the test it seems that the battery did not hold the charge... so when not used it display 4.15V and charged but as soon as you draw some current from it it falls to 3.82v...

[firened]

The one you got me lasted almost 2 years of intense use

this one is a cheap one from AliExpress. was 9.50$
yes this exactly.
i will test if it's better now without the extension cable, if not I'll get another battery.

[OdorousWo1f]

https://www.amazon.c...la-439629573722



can I use this on vigibot with pi?
controlling SG90 and MG996R servos

[firened]

yes absolutely. i use a similar one on PepitoBots

[Mike118]

Yes you just need to configure it on vigibot. Check the documentation : https://www.robot-ma...ds/#entry115134