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Troubleshooting while scanning in line artwork

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Drawings that are poorly aligned or registered

If you have problems with drawings that are poorly aligned or registered, this is usually caused by bad calibration:

• The pegbar may have been moved, even by a very small amount.

Recalibrate the pegbar.

• The calibration may be inaccurate because the calibration chart is in poor condition; for example, the pegholes on the chart may have been stretched. Contact Cambridge Animation for a new chart.

Drawings that an auto-feed scanner fails to recognize

If you're using auto-feed to scan drawings, the software finds each drawing's pegholes using small pieces of black tape attached to the edge of the scan bed. It uses the position of the pegholes to align each drawing. If the software can't find a drawing's pegbar holes, it won't recognize the drawing.

Diagnosing the problem

Should the software fail to recognize a drawing, it inserts a blank into the scanned sequence with the message 'Missing Image':

The scanner software also displays this alert panel for a few seconds before continuing scanning:

The panel shows the part of the image where the software has looked for the pegholes, but failed to find a clear black image of them. You can use this image to help diagnose the problem. If necessary click on the Save Image button, so you can look at the image later on - after the panel is automatically closed.

If the holes don't appear at all in the image, the most likely reasons are:

• The drawings are stacked in the sheet feeder with the pegholes against the wrong edge.

• The scanner's feeder guides are not set in the correct position.

• The field chart size you set in the Calibration / Fieldcharts panel does not match the paper you are using, so the software is looking in the wrong place for the pegholes.

If the holes are very faint in appearance, this is probably because:

• The black tape is not fitted to the scanner bed, or is damaged.

If the holes are misshapen, this may be because:

• The drawing's pegholes are damaged.

• The scanner has pulled through two or more drawings at the same time.

In this case, you'll also get fewer scanned images than you had drawings. Say a batch of 50 drawings produces only 49 images, #36 of which is a 'Missing Image' message. It's likely that drawings 36 and 37 were pulled through together, and hence neither were recognized.

Correcting the errors

Once you have diagnosed and corrected the reason for the failure, you can load the failed drawing again, select the 'Missing Image' in the Drawing Browser window, and rescan. If the failure was because the scanner fed multiple drawings at once, you'll also need to insert extra drawings into the Drawing Browser window.

Titan House, Castle Park, Cambridge CB3 0AY, England Tel: +44 (0) 1223 488200 Fax: +44 (0) 1223 488201 e-mail: support@cambridgeanimation.com

Animo NT User's Guide - Version 2.0 - 29 Jan 1999 Copyright © Cambridge Animation Systems