Delta MMC120 - Manual (Page 35)

35
Default Commands - Refer to the Command area topic for details.
Serial Port - Although the serial port is not actually stored in the board file
itself, it is remembered for every board file in the Windows
Registry. Refer to the Selecting a Serial Port to Use topic for
details.
Scale/Offset Calibration Utilities
Using the Scale/Offset Calibration Utilities
The Scale/Offset Calibration utility provides an easy way to set the Motion Controller’s
Scale parameter, the Offset parameter, and Prescale Divisor bits of the Configuration
parameter.
There are actually several Scale/Offset Calibration Utilities:
• Position Scale/Offset Calibration Utility
• MDT Scale/Offset Calibration Utility
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. Place the cursor in a field under the position axis you wish to calibrate.
3. On the Tools menu, click Scale/Offset Calibration.
4. Move the axis to the first point. This can be done by jogging the axis manually, or
by using the Open Loop command .
5. 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).
6. Under First position, in the Actual position box, type the distance measured to
the first point in position units.
7. 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.
8. 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 monitor
window.
9. Measure the physical distance to the second point on the axis in the position units
that you intend to use.
10. Under Second position, in the Actual position box, type the distance measured to
the second point in position units.