Impact of measurement procedure when error mapping and compensating a small CNC machine using a multilateration laser interferometer

Jean-Marc Linares (1) , Julien Chaves-Jacob (2) , Heinrich Schwenke (3) , Andrew Longstaff (4) , Simon Fletcher (4) , Jakob Flore (5) , Eckart Uhlmann (6) , Jens Wintering (6)

1 ISM - Institut des Sciences du Mouvement Etienne Jules Marey
2 AMU - Aix Marseille Université
3 Technische Universität Braunschweig = Technical University of Braunschweig [Braunschweig]
4 University of Huddersfield
5 Fraunhofer IPT - Fraunhofer Institute for Production Technology
6 Institute for Machine-tools and Factory Management, Department Industrial Information Technology, TU Berlin, Germany

This paper deals with the accuracy of compensation of machine tools using a tracking interferometer using the multilateration method. The measurement strategy and thermal drift compensation of the measurements are studied. It shows that most effects of temperature are accurately compensated by the laser tracking interferometer software. However, thermal drifts of accessories are not taken into account, and are therefore not corrected. To validate the robustness of procedures, the geometrical errors of the same machine tool were measured by five measurement strategies using the same equipment. Each strategy is devised and carried out independently by a different person from several institutions. For each strategy, the geometrical compensations were applied to a set of nominal tool path points. The difference, between the nominal points and the compensated or uncompensated points was calculated. This criterion was used to discuss the procedures employed by the participants.

Keywords: Compensation; Error mapping Machine tool; Laser tracking interferometers; Multilateration

Domains: Engineering Sciences [physics]

Jean-Marc Linares, Julien Chaves-Jacob, Heinrich Schwenke, Andrew Longstaff, Simon Fletcher, et al.. Impact of measurement procedure when error mapping and compensating a small CNC machine using a multilateration laser interferometer. Precision Engineering, 2014, 38, pp.578 - 588. ⟨10.1016/j.precisioneng.2014.02.008⟩. ⟨hal-01440809⟩