Printhead Pressure - Intermec EasyCoder 501 E Installation & Operation Manual

Printhead
Pressure
Adjustment Knobs
Intermec EasyCoder 501 E – Installation & Operation Ed. 1
At printing, the thermal printhead must be pressed against the platen
roller so the heat can be transferred to the media. There must also be
enough pressure to provide a suffi cient amount of friction between
the media and the platen roller that drives the media. Too weak
pressure gives a weak printout quality, whereas too strong pressure
may cause unnecessary wear of the printhead.
The pressure is factory adjusted, but special applications may require
readjustment using the trial-and-error method. Do not use more
pressure than necessary to obtain the desired printout quality.
The print unit is fi tted with two adjustable spring packages, which
allow the pressure to be set by turning the knobs:
• Turn the knobs clockwise to increase the pressure.
• Turn the knobs counter-clockwise to decrease the pressure.
At each quarter of a turn, the resistance increases and a clicking
sound can be heard.
The required pressure may vary between media of different thickness.
Generally, thicker media require more pressure than thinner.
Make a rough adjustment like this:
• Turn both adjustment knobs clockwise as far as they go to
maximum pressure.
• Release the pressure of the inner spring package by turning the
1
knob 2 / turns counter-clockwise (9 clicks).
4
• Release the pressure of the outer spring package by turning the
knob 2 turns counter-clockwise (8 clicks).
Fine-adjust the pressure by turning the outer knob, while retaining
the setting of the inner knob. If the desired result cannot be obtained,
increase or decrease the pressure by turning both knobs a quarter of a
turn in the same direction, then fi ne-adjust the outer knob.
Chapter 13 Adjustments
123