In graphonomics, Axial pen force is the component of the normal pen force that is parallel to the pen. It is dependent upon pen tilt. In the special case of a perfectly vertical orientation of the writing instrument the axial pen force

equals the normal pen force.

See also

  • Graphonomics
  • <nowiki>http://hwr.nici.ru.nl/~miami/taxonomy/node54.html</nowiki>
  • <nowiki>http://hwr.nici.kun.nl/~miami/taxonomy/node57.html</nowiki> Pen ergonomics