62 A255 Robot Arm User Guide
99-04-23
Restoring Factory Calibration Values
The calibration values for your robot are unique. Reload factory calibration values
if the calibration memory fails (resulting in checksum errors) when you attempt to
home the arm.
You need:
• A computer with Robcomm3 software
• Your A255 Robot Arm distribution software disk or your own backup
calibration disk if your system was previously recalibrated.
The distribution disk contains calibration information stored in the following file.
cal\srs_(robot arm serial number).cal
The .cal file contains factory defined calibration values for the robot arm.
Note: If you have previously recalibrated the arm or are using an extra axis in
your application, load the calibration values from your own backup disk
instead.
If lost, a copy of the factory calibration data can be obtained from your nearest
distributor or CRS Robotics.
Before you begin:
• Ensure that your computer is connected to the controller front panel
communication port.
To restore the factory calibration values:
1. Switch both the computer and the controller ON.
2. Switch ON arm power.
3. Transfer control of the robot from the teach pendant to your computer.
a. At the teach pendant, press ESC until the Terminate To screen appears.
b. Select F1(yes), to terminate to the host point of control.
4. Run Robcomm3 and establish communication with the controller by selecting
Terminal from the C500C menu. Insert the distribution disk into drive a:\.
Caution! Save your previous .cal file on a backup disk.
5. Select File Transfer from the C500C menu.
6. Select the .cal file from the a:\ drive and transfer it to the /conf directory on
the C500C controller.
6. Home the arm (refer to page 46) or use your own custom homing procedure.
7. Type ready and press Enter to place the robot at the Ready position. All
markers on the robot should align properly.
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