Adjusting the Printhead Pressure

You may need to adjust printhead pressure if:

Use the inside and outside printhead pressure adjustment dials to set the printhead pressure. Set the pressure to the lowest level necessary to achieve good print quality. The setting marks on these dials range from 1 to 4.

Begin with the pressure settings for your printer model and media width as specified in the following table, and make adjustments to the inside dial (1) and the outside dial (2) as necessary.

Pressure Setting Starting Points

Printer	Media Width	Inside Dial Setting	Outside Dial Setting
ZT411	1 in. (25 mm)	4	1
	2 in. (51 mm)	3	1
	3 in. (76 mm)	2.5	1.5
	≥ 3.5 in. (89 mm)	2	2
ZT421	2 in. (51 mm)	4	1
	3 in. (76 mm)	3.5	1
	4 in. (102 mm)	3	2
	≥ 5 in. (127 mm)	2.5	2.5

If necessary, adjust the printhead pressure adjustment dials as follows:

If the media...	Then...
Requires higher pressure to print well	Increase both dials one position.
Prints too lightly on the left side of the label.	Increase the inside dial setting one position.
Prints too lightly on the right side of the label.	Increase the outside dial setting one position.
Shifts left while printing	Increase the outside dial setting one position. OR Decrease the inside dial setting one position.
Shifts right while printing	Increase the inside dial setting one position. OR Decrease the outside dial setting one position.