Help set up 2 Servo MG995 for Duet3 6HC
-
Re: Help to config Servo MG995 for Duet3 6HC
I join the question: How to connect the second MG995 servo? I have a similar task with the author of the topic: I need to connect 2 servos to the Duet3 6HC. Please help
-
Did you see the answer at the end of that linked thread?
-
@Phaedrux
Thanks for the quick response.
However, it didn't help me, apparently I have little experience.
I am using a Duet 3 Mainboard 6HC (v1.01a) and an external 5V power supply.
Accordingly, the plus and minus servos are connected to an external 5V power supply. I tried to connect the signal wire of the servo to the contacts "io4.out", I tried to connect it to "out8", but the servo still does not work.
P.S.: I have tried all the ways that the author of the original topic tried. -
Please share your config and the results of M122.
What configurations have you tried specifically? -
@witas777 said in Help set up 2 Servo MG995 for Duet3 6HC:
Accordingly, the plus and minus servos are connected to an external 5V power supply. I tried to connect the signal wire of the servo to the contacts "io4.out", I tried to connect it to "out8", but the servo still does not work.
Does the Duet power supply and the 5V supply share the same ground?
-
@o_lampe
I found the solution! The problem was that I didn't have enough experience in basic electrical engineering.
I needed to use the GPIO port, which supports PWM, to control the servo. However, I took only the "io4.out" wire from the GPIO port.
When I connected the GND contact in the GPIO pad with a "-" 5V power supply with a separate wire, everything worked right away!
Many thanks to everyone for participating!
I think that this problem might not have happened for me if this moment had been described in more detail in the documentation on connecting servos. -
undefined Phaedrux marked this topic as a question
-
undefined Phaedrux has marked this topic as solved
-
@witas777 said in Help set up 2 Servo MG995 for Duet3 6HC:
When I connected the GND contact in the GPIO pad with a "-" 5V power supply with a separate wire, everything worked right away!
In your case it might be OK to use a thin jumper wire to connect GNDs.
But in many cases it's better to connect GNDs directly between the power supplies with a thick wire. (search: usb cable melting )
Don't do both, because you might create a ground-loop which can cause other problems
