Why does not my servo motor work?

[megumi]

Hello all,

I can work my servo motors, so I have two questions.

Firstly, I'm using PXI-7340 & UMI 7764 to control AC motor on servo motor (TAMAGAWA SEIKI co.),

But in MAX, motor doesn't work with servo type.And there is no signal between AnalogOutput and AnalogOutputGround.

Can I connect UMI to the motor correctly?

Now, I connect encorder signals with changing differential line driver (motor driver) to TTL (UMI) using quadruple differential line receiver.

Is it right?

If it is right, why does the motor work?

Secondarily, when I use stepper type in MAX, the motor work with open-loop. But when I use stepper type in MAX, the motor doesn't work with cloosed-loop.Why?

Polarities of encorders(A, B, Index) make matches my servo motors by setting in MAX.

Why?

Thanks,

megumi

[Buechsenschuetz]

I cannot help you with the servo motor due to lack of experience but maybe with the stepper motor problem.

It would be very helpful if you could supply detailed information about what "does not work". What kind of error messages do you receive (if any), and what about the motor, doesn't it move it all, does it make irregular motions and so on.

The more detailed your problem description the more detailed will be the answers. There are many possible reasons for a non-working setup.

[megumi]

Thank you for your reply.

The "does not work" means that the motor doesn't move with servo type.

In MAX, there is no error when a target position is less than 999 in 1-D Interactive, but doesn't move. When the target position is more than 1000 and I click "Apply" and "Start", error ramps of "Motor off" and "Following error occurred" are red. And the motor doesn't move.

I thought that firstly signals of encorder have been wrong because the motor have not moved with stepper mode of closed-loop and feedback of encorder.

So I would connect correctly wiring of encorders, but the motor doesn't move.

Wiring of all is "STEP", "DIR", "AO", "ENC A, B and Index bar" respectively. In MAX, type is servo mode, feedback is encorder, kinds of limit switch are not used.

I supply it if you need the other setup of wiring or information.

Regards,

Megumi