Harmony Scan Guide > Configuring Scanners > Adapting the Scanner Hardware

Adapting the Scanner Hardware

Before using your scanner, you must make a few minor adjustments to make sure it can handle the special types of animation paper you will be using.

This section is divided as follows:

Modifying the ADF Paper Chute
Mounting the Peg Bar and Calibrating the Scanner

Modifying the ADF Paper Chute

On the ADF paper chutes of supported Fujitsu scanners, the paper guides are connected to each other by a cog wheel that keeps the paper guides and the drawings centred on the chute. Adjustments must be made to this type of Fujitsu scanner to avoid problems during the scanning process.

To compensate for the centred scanning on the ADF chute of Fujitsu scanners, do one of the following:

Modifying the Scan.conf File for Centred ADF Scanning (requires no hardware modification)
Removing the Cog Wheel on Paper Chute
Adding a Paper Guide to Your ADF Scanner
Installing a Strip of Black Tape on the ADF Paper Path

Modifying the Scan.conf File for Centred ADF Scanning

If you do not want to modify the ADF chute so that it is aligned towards the back of the scanner, you can use the leftOffset option in the Scan.conf file. To calculate the leftOffset option, consider that the paper chute on all supported Fujitsu scanners are 12 inches (2.54 cm) wide . If your paper is 10.5 inches (26.67 cm) wide, the difference between the chute and the paper is 1.5 inches (3.81 cm). Since this difference is distributed on both sides of the paper chute, the offset from either edge is 0.75 inches (1.90 cm). Therefore, the leftOffset option is 0.75 inches (1.90 cm).

The leftOffset option was added to this sample of the Scan.conf file:

host: scan-1
name: Fujitsu10.5
descr: The scanner to use for black & white and greyscale scans.
device: sc1;d5;l0

model: Fujitsu_fi4750C
defaultThreshold: 80
defaultResolution: 200
registrationStrictness: Loose
leftOffset: 0.75

You can add additional entries in the Scan.conf file to support paper of different sizes. For example:

host: scan-1
name: Fujitsu8
descr: The scanner to use for black & white and greyscale scans.
device: sc1;d5;l0
model: Fujitsu_fi4750C
defaultThreshold: 80
defaultResolution: 200
registrationStrictness: Loose
leftOffset: 2

Removing the Cog Wheel on Paper Chute

If you don't want to modify the Scan.conf file, you can remove the cog wheel so the paper guides can slide independently. This allows you to position the paper guide closest to the back of the scanner as far as it can go towards the back of the scanner. You can then slide the other paper guide up to meet the bottom edge of the stack of drawings to keep them aligned.

Adding a Paper Guide to Your ADF Scanner

Instead of removing the cog wheel on the ADF paper chute, you can make a paper guide to place between the existing paper guides to keep the stack of drawings in the proper alignment in the paper chute.

To perform this procedure, you will need the following materials:

A paper guide made of cardboard, a block of wood, or similar material.
Adhesive tape to secure the paper guide to the paper chute.

Installing a Strip of Black Tape on the ADF Paper Path

When you scan drawings with the Scan module, drawings on paper become digital images in the Harmony system. These digital images must be properly aligned during the scan process to ensure that the animation flows smoothly from frame to frame in the final output.

If you want to scan many drawings using the ADF chute on your scanner, you must use the Optical Registration option in the Scan module to automatically align your drawings.

When you select the Optical Registration option, the Scan module identifies the peg holes to align the drawings.

You can also use the Optical Registration option if you want to manually scan a drawing on the flatbed part of the scanner.

If you have a peg bar attached to your scanner, you don't have to use optical registration because the drawings will be aligned by the peg bar. However, you will have to scan your drawings one at a time.

Peg holes in your drawings must be filled with black in the final scanned image for the optical registration to be able to locate them. Your scanner must be modified prior to scanning to ensure black peg holes appear in the scanned image.

For ADF Scanning

Tape a piece of dark paper to the ADF feeder in the position where the peg holes will pass as they are scanned.

If you don't place the black tape on the ADF paper path, the peg holes in the drawing pass in front of a white background. This does not provide enough contrast for the Scan module to distinguish where the peg holes are and it will not be able to register and align the autofeed drawings.

For Manual Scanning

Tape a piece of dark paper to the scanner cover above the position of the peg holes.

RICOH Scanner

Fujitsu Scanner - ADF

Fujitsu Scanner - Cover

Before you perform this procedure, you need the following materials:

A strip of black adhesive tape approximately 1.25 inches (3.5 cm) by 0.75 inches (2 cm). Black plastic electrician's tape is fine.
A sheet of drawing paper with field size and peg hole locations identical to the type that you intend to scan with the autofeeder.

Mounting the Peg Bar and Calibrating the Scanner

Autofed and manually pegged drawings must register against each other if you intend to use both scanning methods. Therefore, you must calibrate the scanner so that it can register the peg holes accurately using the peg bar.

Before you perform this procedure, you will need the following materials:

An ultra-thin peg bar. Suggestion: Audio-Visual Stainless Steel Pegbar (catalog number AP105)
Accurate ACME standard registration
3-peg, single-field length (0.05" x 1.5" x 12.0") (1.27mm x 38 mm x 304.7mm)
Low brass pegs (1/16" in height) (1.58 mm in height)
Lightweight sprung stainless steel base
Ideal for work requiring exposure on a process camera, print down frame or scanning bed

This is obtainable from Chromacolour International www.chromacolour.com

A drawing with field size and peg hole locations identical to the type you intend to scan.

Instead of using a drawing of a character or object, you may find it helpful to create a test "drawing" by placing a sheet of drawing paper over a field chart and tracing several heavy line segments from the field chart.

For more accurate calibration, draw lines from the centre to the edges of the paper. This will give more reference points at various locations on the paper. For example, trace over the centre X and several corners of the fields from the centre out towards the edges of the field chart. Then peg and autofeed the test drawing as described in the following procedure.

Before calibrating the scanner:

Create a small scene in Harmony using the test drawing.
Using Control Center, create a job that has one scene.
Using Stage, create an exposure sheet for the job that has two drawing columns (one for the drawing you will autofeed and one for the drawing you will manually peg before scanning).