# Need help about servomotor pinout

11 Apr 2018 05:21 #108792 by kt600v
Hello, first of all, it's first time I'm working with servomotors.

I attach a photo of the motor specifications:
Could someone explain to me what are the G+ and H- pins used for? are they IN or OUT?

Finally, I Would really be grateful if someone recommend me bibliography about servomotors .

##### Attachments:

11 Apr 2018 13:04 #108807
I don't know for sure, but my 1st best guess would be; those are the connections for tach feedback.
The following user(s) said Thank You: kt600v

11 Apr 2018 14:58 #108815 by kt600v
many thanks Todd , i just confirmed they are tg feedback . Do you know where i can find information about servomotors ? there are many things i dont know yet.

11 Apr 2018 16:29 #108826 by andypugh
Wikipedia might be a good start.

That looks like a DC servo to me, with an attached tachometer.

Do you also have encoder feedback?

11 Apr 2018 16:32 #108827 by PCW
Its pretty dark but you can also read "A,B,Z" on the label

11 Apr 2018 16:36 #108828
What do you want to know? The exact details, math and science behind it can fill entire collage level courses.

But the basic gist is you have a motor with position feedback and a controller that reads the feedback, and adjusts the amount of electricity sent to the motor to maintain the desired position/motion.

17 Apr 2018 18:19 #109215 by kt600v
many thanks for your reply Todd, I guess the signal that controls the motor is a Variable AC or DC voltaje, and this adjusts rotation speed and position , am I right?

17 Apr 2018 18:25 #109216
Yes, the drives usually take a +/-10v analog DC signal with 10v = maximum velocity in the positive direction, 0v = no movement, and -10v DC max velocity in the negative direction.

22 Apr 2018 18:36 #109439 by bevins

kt600v wrote: many thanks Todd , i just confirmed they are tg feedback . Do you know where i can find information about servomotors ? there are many things i dont know yet.

They are DC servo motors.