In this paper, we analyze a force sensor for a collaborative robot. The goal is to study the possibility to add pressure control capabilities to a robotic arm, in order to replicate human handwriting. We address the problem of finding the suitable force exerted by the robot to match a given pressure value detected in the Intuos Wacom tablet when performing handwriting. Experimental results provide the function that relates both values. This research contributes to the broader field of robotic automation in handwriting replication, with implications for both legal and biometric authentication systems.