~JC - Set Media Sensor Calibration

Overview

The ~JC command forces a label length measurement and recalibrates both media and ribbon sensors. Ensures accurate media detection and proper label positioning after changing media types or when sensor readings drift.

Syntax

~JC

Parameters

None

Description

• Performs sensor calibration
• Measures label length
• Calibrates media sensor
• Calibrates ribbon sensor
• Feeds media during process

Examples

Recalibrate Sensors

~JC

Full Setup After Media Change

~JC

When to Calibrate

Required After

• Changing media type
• Installing new media roll
• Sensor drift detected
• Inconsistent feeding
• Media size change

Recommended

• Monthly for high-volume
• After media storage change
• When switching suppliers
• Seasonal (temperature change)

Calibration Process

1. Send ~JC
2. Printer feeds media
3. Sensors measure and adjust
4. Calibration data stored
5. Printer ready to print

Usage Notes

• Printer will feed media during calibration
• Process takes several seconds
• In continuous mode: only media/ribbon sensors calibrated
• No label length measurement in continuous
• Essential for accurate printing
• Referenced in ^MF parameters

Related Commands

• ~JG - Graphing Sensor Calibration
• ^SS - Set Media Sensors
• ^MF - Media Feed
• ^MN - Media Tracking

See Also

• Graphing Sensor Calibration (~JG)
• Set Media Sensors (^SS)