Update README.md

README.md

@@ -55,6 +55,8 @@ This repository hosts the configuration files for generating ergoCub urdf. To ge
 * You need to install the repos that contain the CAD models, i.e. cad-libraries (see https://github.com/icub-tech-iit/cad-libraries/wiki/Configure-PTC-Creo-with-cad-libraries) and cad-mechanics https://github.com/icub-tech-iit/cad-mechanics/.
 * You need to install creo2urdf following the README in https://github.com/icub-tech-iit/creo2urdf, either from source or using the binary available for each release.
 
+The CAD files used to generate the URDF models have been prepare according to the procedure described in https://github.com/icub-tech-iit/cad-libraries/wiki/Prepare-PTC-Creo-Mechanism-for-URDF .
+
 You can find there the relative documentation on how write those configuration files, and more details in the README of the following folders:
 * [`urdf/creo2urdf/data/ergocub1_0`](./urdf/creo2urdf/data/ergocub1_0)
 * [`urdf/creo2urdf/data/ergocub1_1`](./urdf/creo2urdf/data/ergocub1_1)