Accuracy Calibration
Purpose
The accuracy calibration procedure is used to correct the end8point accuracy of the media axis. The cartridge axis does not require calibration and is used to calibrate the media axis.
Perform the accuracy calibration whenever the:
DEEROM is erased
DMain PCA is replaced
DDrive roller is removed or replaced
DMedia (X8axis) motor is replaced
What is the EndPoint Accuracy Specification ?
The end8point accuracy specifies how accurately a plotter can draw a given length of line. The end8point accuracy specification for the plotters is ± 0.38 mm (0.015 in) or ± 0.2% of the specified vector length, whichever is greater, at 23dC (73dF), at 50860% relative humidity on HP special polyester film. Use the following formula to calculate the plotter's accuracy:
Measured length ± Desired length | x 100 = %Error | |
Desired length | ||
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What can Affect the EndPoint Accuracy ?
Various part tolerances inside the plotter affect the accuracy (in particular the drive roller). Other outside influences include:
DMedia thickness. Thicker media creates longer lines.
DMedia expansion. As the media grows, so do the lines.
DApplication software. The software may be instructing the plotter to draw an incorrect line length.
DThe EEROM has been cleared. The accuracy constants are stored in this non8volatile memory component.
(Further information chapter 5, w MediaDrive Accuracy.)
786 Calibrations | C3187890000 |