this adjustment may be necessary if printing is too light on one side or if thick media is used.
refer to figure 28.

the pressure adjustment dials each have four possible settings designated by blocks of increasing size embossed on the print mechanism. the smallest block (fully counterclockwise) is considered “position 1” and the largest block (fully clockwise) is considered “position 4.”
use table 4 or table 5 (depending upon which printer you have) to select the initial dial settings for your media.

some media types require higher pressure to print well. for these media, increase both dials one position. if the media tends to shift to the left while printing, increase the right dial setting one position or decrease the left dial setting one position. if the media tends to shift to the right while printing, increase the left dial setting one position or decrease the right dial setting one position.
in addition, if you have a z6m printer with the value peel-off option, zebra recommends setting the left dial to 7 and the right dial to 6 when using media that is 6" or wider.