1792 réponses à ce sujet

[firened]

% of weight on front wheels:
CakeOnIce: 74%
Ibiouda: 77%
VigiUPSv3, with mecanum: 70%
VigiUPSv3, with mecanum, with 4G stick, without antennas, estimate: ~65%
VigiUPSv3, standard wheels, estimate: ~73%
VigiUPSv3, standard wheels, with 4G stick, without antennas, estimate: ~67%

Ok that's unexpected. It will be similar or less of a problem with the new board.

On CakeOnIce and ibiouda i normally have the ramp / governer enabled, so that the robots do not fall forward and slam back down on every stop. I disabled that ramp on CakeOnIce if someone wants to test it.

[Mike118]

We can design a counter weight add on later if needed. There is a spot on the ups board on the back to add an additionnal accessorie...

[firened]

I got the sunfounder fusion hat+ but forgot which tests i was supposed to do @Mike118

[garfield2142]

OMG, this board basically has everything. How loud is the speaker? Is the microphone as good as the orange one? It's sold out on sunfounder's website unfortunately, but I'll try and order one for myself too.

[firened]

From time to time here available
https://a.aliexpress.com/_EJtxr96

[firened]

Audio is I2S, it's not clear yet how that'll work

[Mike118]

The goal was to test it as a ups for a vigibot robot. Test the mic , the speaker the voltage readings etc... and check what IC is used

[Mike118]

@fire_ned

[firened]

Battery and flex cable are tight with the VigiUPSv3. Does it have an official name yet?

[firened]

FusionHat:
First observation:
Looks like the PWM outputs are controlled by the MCU. There's no PCA IC.
https://docs.sunfoun...ml#on-board-mcu

[garfield2142]

I placed an order just now. It will probably take a month, since the chinese new year just started

[Mike118]

I missed that...

[garfield2142]

Hmmm... So the PWMs are controlled through I2C? Does this mean the clientrobotpi.js will need to be completely rewritten?

[Mike118]

Not completely but yes it needs an update to work with it.

[ralph_62550]

Hello
I am trying to build a minus type robot. For the power I use the Waveshare UPS HAT (D).
The strange thing is that at the lowest speed usually not all the motors run. Only when I step up to the second or third stage of the speed all the motors run.
At first I thought that was because I connected the power supply for the servos and motors directly to the battery of the Waveshare board (i.e. voltage between 3.7 and 4.1 volts).
For testing, I connected the servos and motors directly to the 5 volts (measured 5.2 volts) of the Raspberry PI and also connected the external USB power to the Waveshare board.
Nevertheless, still not all motors run at the lowest speed. It is not always the same motor not running.
What could be the problem here?

[Mike118]

"It is not a problem ". Thus is a normal behaviour with pwm too low. You can tune the config on vigibot to increase a little the smallest pwm sent.

[ralph_62550]

I assume this configuration is under "Hardware configration" on vigibot.com for my robot. Maybe it ist the PWMFREQUENCY setting? I there a documentation somewhere about all the hardware configuration and remote controller configuration options available? This would allow me to read the whole stuff instead of bothering you with my questions.

[Mike118]

@Ralph check this https://www.robot-ma...elays-and-leds/

[Mike118]

And this generally : https://www.robot-ma...fr/#entry105817

[firened]

It's the `STEPY, STEPZ` in rc config.
However, if you increase it so it eill drive with one press, you'll loose precision, as step 2 will be pretty fast then.

the robots are rarely controlled using the pulse keys (STEP). Usually they're controlled using the middle joystick on mobile, or using ASDF on PC