4.2 Sensors

4.2.1Paper sensors

The printer has two paper sensors.

4.2.1.1 Roll paper near-end sensor

The roll paper near-end sensor is to detect the condition when the remaining amount of the paper is getting low and it is located on the roll paper supply unit. It detects the near-end of the roll paper by detecting the roll paper diameter. You can adjust the sensor position. See page 2-6for details for adjustment.

The normal printing task will be performed even in the near-end status.

Note:

The detecting the near-end status of the sensor does not necessarily indicate the complete end of the roll paper. Use the sensor as an indication of replacing a roll paper.

4.2.1.2 Roll Paper End Sensor

The roll paper end sensor is located in the paper path. It detects the presence of paper through the roll paper in the paper path.

When there is no paper in the path (paper end status), the ERROR LED and the PAPER OUT LED indicator will light and it will be in the error status.

If the sensor detects the roll paper end, the printer will stop printing even in the process of printing. It is recommended that you mainly use the roll paper near-end sensor and use the roll paper end sensor secondarily.

4.2.2 Printer Cover Sensor

4.2.2.1 Roll Paper Cover Open Sensor

The cover-open sensor monitors the roll paper cover. When the sensor detects an open cover while printing, the printer stops printing immediately and automatically goes offline. Depending on the Msw 8-8 setting, an open cover error is handled as either a recoverable error or unrecoverable error as described below.

Msw 8-8 off:

Automatically recoverable error. The ERROR LED flashes.

 

When the printer cover is closed, the ERROR LED goes off,

 

and the printer goes online and starts printing at the

 

beginning of the line it was printing when the cover was

 

opened.

Msw 8-8 on: (Default)

Recoverable error. The ERROR LED flashes. Since the

 

ERROR LED still flashes after the cover is closed, send the

 

error recovery command to recover from the error.

4-8Application Development Information

Rev. B

Page 96
Image 96
Epson L90 manual Sensors, Printer Cover Sensor, 8Application Development Information Rev. B