Galil DMC-3425 user manual Connect Standard Servo Motor

The DMC-3425 accepts single-ended or differential encoder feedback with or without an index pulse. If you are not using the AMP-1460 or the ICM-1460, you will need to consult the appendix for the encoder pinouts for connection to the motion controller. The AMP-1460 and the ICM-1460 can accept encoder feedback from a 10-pin ribbon cable or individual signal leads. For a 10-pin ribbon cable encoder, connect the cable to the protected header connector labeled JP2. For individual wires, simply match the leads from the encoder you are using to the encoder feedback inputs on the interconnect board. The signal leads are labeled CHA, CHB, and INDEX. These labels represent channel A, channel B, and the INDEX pulse, respectively. For differential encoders, the complement signals are labeled CHA-, CHB-, and INDEX-.

Note: When using pulse and direction encoders, the pulse signal is connected to CHA and the direction signal is connected to CHB. The controller must be configured for pulse and direction with the command CE. See the command summary for further information on the command CE.

Step D. Verify proper encoder operation.

Once the encoder is connected as described above, turn the motor shaft and interrogate the position with the instruction TP <return>. The controller response will vary as the motor is turned.

At this point, if TP does not vary with encoder rotation, there are three possibilities:

1.The encoder connections are incorrect - check the wiring as necessary.

2.The encoder has failed - using an oscilloscope, observe the encoder signals. Verify that both channels A and B have a peak magnitude between 5 and 12 volts. Note that if only one encoder channel fails, the position reporting varies by one count only. If the encoder failed, replace the encoder. If you cannot observe the encoder signals, try a different encoder.

3.There is a hardware failure in the controller - connect the same encoder to a different axis. If the problem disappears, you probably have a hardware failure. Consult the factory for help.

Step E. Connect Hall Sensors if available (sinusoidal commutation only)

Please consult factory before operating with sinusoidal commutation. Hall sensors are only used with sinusoidal commutation on the DMC-3415 or DMC-3425 and are not necessary for proper operation. The use of hall sensors allows the controller to automatically estimate the commutation phase upon reset and also provides the controller the ability to set a more precise commutation phase. Without hall sensors, the commutation phase must be determined manually.

The Hall effect sensors are connected to the digital inputs of the controller. These inputs can be used with the general-purpose inputs (bits 1 - 7). If you are using the DMC-3425, only the first 3 inputs are available for general purpose.

Each set of inputs must use inputs that are in consecutive order. The input lines are specified with the command, BI. For example, if the Hall sensors are connected to inputs 1, 2 and 3, use the instruction:

BI1 <CR>

Step 8a. Connect Standard Servo Motor

The following discussion applies to connecting the DMC-3425 controller to standard servo motor amplifiers:

DMC-3425 Chapter 2 Getting Started• 19