Connecting PCI 7350 to Applied Motion BluAC5-S drive

[ajfaul]

I need help connecting a PCI 7350 to an Applied Motion BluAC5-S driver and brushless servo motor.  I have made the following connections, using a SCB-68, but I continue to get a following error in MAX and a current limit error on the drive:

BluAC5               PCI 7350

Pin 1                    Pin 29

Pin 13                  Pin 31

Pin 25                  Pin 36

Pin 23                  Pin 37

Pin 19                  Pin 2

The connector layout of the BLuAC5 is attached.

Are there any other connections that I need to make? 

Any help will be appreciated.

[Brian_Beal]

There are many things that could go wrong here.  Be sure the drive is configured for torque mode, and all other settings are configured.  Check to make sure you are reading the encoder in MAX and that it is scaled properly by turning the motor by hand and watching the counts.

[ajfaul]

Thanks.  I will try your suggestions.  Why should the drive be configured for torque mode?  I thought that I could run it in either velocity, torque or position mode.

[yaHeard]

Hello ajfaul,

Are A, B, and Z 3 separate encoders for 3 axes?  If so then it seems that you have two encoders wired to the Axis 1 encoder input on the 7350.

[ajfaul]

Hi Carlton,

No, I only have one axis (one motor) connected.

Thanks

Andre

[Brian_Beal]

Torque mode is the most common way to run a servo drive with a servo controller.  Your position and velocity loops will be closed in the controller, not the drive.  Applied Motion states that you can use the analog input for relative position mode, but I don't understand how that would work.  Maybe you can explain your application, and we can give you better feedback.

Encoders have 3 channels: A,B and C.  They may be called something else, but you need A and B is you are doing positioning.  The C channel is the index, and is usually only used for precise homing.

[ajfaul]

Brian,

Thanks for the feedback.  I am using Labview to control a motor that will drive a diaphragm pump, in a push-pull configuration, so the motor will have to oscillate between two positions.  I have encoder channels A and B connected, but not the index channel.  Maybe I should do that to get more precise position feedback?  If I understand it correctly, you can use an analog +-10V signal for position control, where the voltage level is proportional to the relative position of the motor shaft.

Andre

[Brian_Beal]

I would just use the BluAC by itself.  Send the commands over the serial port using SCL. 

[RVallieu]

Why are you not using a UMI-7764?  You stated you were using an SCB-68.

I have just connected a PXI-7342 to a BLu-AC5 drive connected to a servo motor.  There are several steps you need to take to get the BLu-AC5 to work with the motor in addition to properly connecting the encoder feedback and analog control signal.

Ryan

Message Edited by RVallieu on 02-04-2008 03:15 PM

[ajfaul]

Ryan,
Thanks for the feedback.  I am fairly new to motion control so please forgive my ignorance.  I have a UMI-7764 available and have used this too to connect the PCI-7350 to the BLuAC-5 drive, but have not had much success in getting the motor to move consistently.  I will appreciate it if you will be able to provide me with your connections and the steps needed in order to get the motor to behave properly.
Regards
Andre