Browse Prior Art Database

Simplified Vertical Print Position Calibration Method

IP.com Disclosure Number: IPCOM000100353D
Original Publication Date: 1990-Apr-01
Included in the Prior Art Database: 2005-Mar-15
Document File: 2 page(s) / 47K

Publishing Venue

IBM

Related People

Gotoh, M: AUTHOR [+3]

Abstract

Disclosed is a method for a printer to calculate a feed adjustment value. The printer saves in a nonvolatile RAM the value which is used for the feed adjustment which is read whenever the power switch turns on.

This text was extracted from an ASCII text file.
This is the abbreviated version, containing approximately 82% of the total text.

Simplified Vertical Print Position Calibration Method

       Disclosed is a method for a printer to calculate a feed
adjustment value.  The printer saves in a nonvolatile RAM the value
which is used for the feed adjustment which is read whenever the
power switch turns on.

      At first an operator inserts into the printer a medium on which
grid lines are preprinted.  Then the printer prints two slant lines
as crossing grid lines and a sequence of numbers beside the lines in
upper and lower area of the medium, as shown in a figure, and ejects
the medium.

      Into the printer the operator inputs the numbers NH and NL
which are printed beside the point where the each slant line and grid
line cross, and the printer calculates the feed adjustment value and
stores it into a nonvolatile RAM.

      How to calculate the value is described below.  In the figure a
distance of the upper and lower slant lines B is given by
   B=C-A(NH-NL)
where     A:  Vertical distance of the points of the slant
               line from one number to the next number,
               that is, (A1-A2).
           C:  Distance of the upper and lower grid lines
which
               cross each slant line
           NH: Number of the point where the upper grid and
the
               slant line cross
           NL: Number of the point where the lower grid and the
              ...