Generally, printers have multiple shafts, and it's crucial to specify which one for determining adjustability.
The paper feed axis typically isn't adjustable, except in cases like end-of-life printers where inaccuracies affect print quality.
Printer head tray axes, however, can be adjusted. This requires measuring tray thickness and gap with a gauge.
Manufacturers often provide after-sales service units with various adjustment ranges (typically between 0.15 to 0.5), using cam-shaped bushings or shaft tiles to ensure linear motion accuracy.
Special adjustment software is necessary to disable the ink supply system during printing. Without these conditions, adjustments are usually not recommended unless experimenting with an end-of-life printer under controlled conditions.
