InoTec SCAMAX H12, User Manual

Page: 89 / 136

Scanning Documents User Manual H12 / SCAMAX® 8x1 - Version 2019.12
Page 89 of 136
5.3. Operation of the Input System
The used feeder system, processes a wide range of
different paper thicknesses, also mixed in one stack.
It is designed so that regardless of paper thickness
and surface finish an optimal feeding performance is
achieved without the need for an adjustment having
to be made.Centered above the front edge of the Input
Tray, is the Roller Assembly that incorporates a PreInput
Roller and an Input Roller. Upon Scanstart (see chapter
5.8. ) the input tray is lifted until the PreInput Roller rests
on the paper stack. The PreInput Roller pulls the docu-
ments from the top of the stack and transports them to
the Input Rollers behind. The force applied to documents
by the PreInput Roller may be changed in 5 steps by
using the Pressure Adjustment Paper Input. You might
notice the PreInput Roller skidding over documents,
without actually moving them. In this case, increasing
the contact pressure will usually improve paper trans-
port. Below the Input Roller is the Separation Roller that
separates the sheets possibly adhering to one another
by its braking action.
5.3.1. Paper Separation Adjustment
Different types of documents will exhibit varying ad-
hesive properties. Therefore, in order to minimize the
occurrence of double feeds, the contact pressure for
the Separation Rollers may also be increased, similar to
what is done at paper input. To perform this adjustment,
you will first need to open up the scan plane ( see chap-
ter 6.1. ) and then remove the front pressure unit ( see
chapter 7.3.3. ). Located behind the ultrasonic sensors
is a panel with a rotary control knob and a dial, slightly
above the knob. This dial serves as an indicator for contact pressure and features a scale with several
thin lines and one bold line. Each line corresponds to one revolution of the control knob, the bold line
represents the factory setting. By turning the knob so the dial moves far into the panel, the default
contact pressure may be more than doubled. Please note that with high contact pressures, it is no
longer possible to completely deactivate the
Separation
( see chapter 4.6.3.2.2. ).
5.3.2. Friction Linings Types
The friction linings of the Input Rollers and the Separation Roller are made such that cleaning (see
chapter 7.2.1. / 7.2.3. ) is hardly necessary during the process and can be performed as needed without
much effort by the user. Once the linings are worn out, they can be changed with a few simple steps
(see chapter 7.2.2. / 7.2.4. ).
The friction linings come in different colors, which reflect the different degrees of hardness, of the
materials used. The operation of the Separation Roller relies on a balanced combination of contact
pressure and roller lining friction. For this reason, the white coating of the Separator Roller is made
from relatively hard material, since a softer coating would wear off, too quickly. The green coating of
the Input Rollers is made from significantly softer material, since their operation predominantly relies
on friction. Since certain types of documents might require even more friction at the PreInput Rollers,
you might want to experiment with an even softer coating ( red ) or with a ribbed coating. Roller test-
sets with these two types of coating are included in Accessory Set H12 ( see chapter 3.1. ), which is part
of the scanner’s scope of delivery.
Dual Input Hopper
Separation Roller
PreInput Roller
Input Roller
Roller Assembly
Pressure Adjustment
Paper Input
Scale
Pressure Adjustment Paper Separation