Position Scale/Offset Calibration Utility

For a description of all Scale/Offset Calibration Utilities, see Using the Scale/Offset Calibration Utilities. To use the general position Scale/Offset Calibration Utility:

1. Choose two axis positions to use for this calculation. These points should be significantly far apart to minimize errors. Generally, the extend and retract limits are fine points to choose.

2. For MDT axes, on the axis you will be calibrating, make sure the No Transducer status bit is off. You may need to issue a 'P' command to turn the bit off. This will ensure the Counts values are read correctly from the RMC.

3. Place the cursor in a field under the position axis you wish to calibrate.

4. On the Tools menu, click Scale/Offset Calibration.

5. Move the axis to the first point. This can be done by jogging the axis manually, or by using the Open Loop command.

6. Measure the physical distance to the first point on the axis in the position units that you intend to use (for example, thousandths of inches, millimeters).

7. Under First position, in the Actual position box, type the distance measured to the first point in position units.

8. Under First position, click Use Current, which copies the COUNTS on this axis being calibrated to the Counts box under First position. You can also manually type a value in this box, but it is easiest to use the Use Current button.

9. Move the axis to the second point. You may want to move the Scale/Offset Calibration dialog box out of the way so that you can use the main RMCWin window.

10. Measure the physical distance to the second point on the axis in the position units that you intend to use.

11. Under Second position, in the Actual position box, type the distance measured to the second point in position units.

12. Under Second position, click Use Current.

13. Under Extend/Retract Limits, choose how you wish to have the limits set:

• If you had the extend and retract limits set correctly, click Use current limits, adjusted for new Scale and Offset to adjust the limits for your new Scale and Offset.

• If the points you used for the two positions are your limits, click Set limits to above positions.

• Otherwise, click Set limits to the following values and type the limits in the text boxes.

13. Click Apply, which sets the Scale, Offset, the Prescale Divisor bits of the Configuration word, Extend Limit, and Retract Limit.

14. Click Done.

15. Issue a 'P' command for the axis to have the new parameters take affect.

Copyright (c) 1997-2015 by Delta Computer Systems, Inc.