Xerox 6100BD - Phaser Color Laser Printer Fundamentals page 94

Quality control
Note the closer tolerance for
Canadian and International standards
Align bottom of MICR characters on
the document with center solid line
6-8
The bottom edges of adjacent characters within each field
should not vary vertically by more than 0.030 inch/0.75 mm
(ANSI), 0.015 inch/0.381 mm (ISO), and 0.007 inch/0.18 mm
(CPA). Vertical variation occurs most often in the Amount field,
which indicates an impact printer problem.
Use the MICR Gauge to measure character-to-character vertical
position (see the following figure). Vertical variation from one
character to the next is seldom produced by a Xerox MICR
printing system unless the document has design problems.
Vertical character alignment section
Vertical character alignment section enlarged
Figure 6-5. Vertical variation check using the MICR gauge
Generic MICR Fundamentals Guide