User`s manual

GFK-1742A D-1

Start-Up and Tuning GE Fanuc Digital and

Analog Servo Systems

This appendix provides a procedure for starting up and tuning a GE Fanuc Digital or Analog

servo system. For Digital servos systems, there are two control loops in the DSM314 that require

tuning, the velocity loop and the position loop. Always begin with module configuration then

proceed to the velocity loop setting and finally the position loop. For Analog servo systems, there

are a series of Start-Up Procedures to follow.

GE Fanuc Start-Up and Tuning Information for DIGITAL Servo

Systems

There are three major sections covered:

•

Validating Home Switch, Over Travel Inputs and Motor direction.

•

Tuning the Velocity Loop.

•

Tuning the Position Loop.

Validating Home Switch, Over Travel Inputs and Motor direction

1. Connect the motor, amplifier and DSM314 module following the procedures in Chapter 2.

2. If Over travel Limit switches are used (Overtravel Limit Switch = Enabled in configuration),

wire them to the correct 24V terminal board points (refer to Chapter 3). The overtravel

inputs are operated in the fail-safe mode i.e. a normally closed or PNP type switching device

should be used. Current must be sourced to the input to maintain a logic level 1 on the input

while the axis is NOT at the overtravel position or an alarm condition (Error A9) will be

returned. Otherwise the Overtravel Limit Switch configuration must be set to Disabled using

the VersaPro configuration software.

3. If a Home switch is used (Home Mode = Home Switch in configuration), wire it to the correct

24V terminal board points (refer to Chapter 3). The Home switch must be wired and actuated

so that it is ALWAYS ON (closed) when the axis is on the negative side of home and

ALWAYS OFF (open) when the axis is on the positive side of home. Typically the Home

Appendix