Paper Loading Detection; Detection Methods - Epson TM-C3500 Series Developer's Manual

Paper Loading Detection

This printer is equipped with a paper loading detection function. This section describes detection
methods and paper limitations.

Detection Methods

Black Mark Detection
Sensors are positioned facing the backside of the paper to detect paper loading from the optical
reflectance of the paper.
(The black mark reflectance rate must be 10% or lower, and the white reflectance rate must be
70% or higher.)
In order to accurately detect black marks, use paper having black marks printed at the positions
indicated for each black mark of the paper specifications.
Gap Detection
Transmission-type sensors are positioned along the paper path to detect paper loading from
differences in the light transmission rates between the backing paper and labels.
(The light transmission rate of the backing label must be 40% or more and that of the label
must be 23% or less.)
Light transmission rate: Light transmission rate (%) = Light transmission amount/Amount of
irradiation light x 100
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