It becomes increasingly important as the table travel is increased. Ambient temperature changes are one obvious source of thermal expansion. As the positioning table warms, its constituent parts undergo expansion, at a specific rate for any material. Accordingly, to permit any two users to agree on what constitutes an "accurate" positioning system, all critical dimensional measurements world-wide are understood to take place at 20 degrees C (68 degrees F).
Imported from the CTE archive to seed discussion on MFGAxis.
Originally published on CTE: 2019-01-19
CTE source: https://ctemag.com/news/thermal-expansion-poses-significant-constraints-accuracy-achievable-positioning/
Legacy path: /thermal-expansion-poses-significant-constraints-accuracy-achievable-positioning