Assembly of micro mechatronical systems in small to medium volumes is missing economical solutions for automation. Due to a great variety of processes characterized by high requirements and complexity automation is realized only in specialized manufacturing lines for mass production. As a result an automated micro-assembly is usually capital intensive. Considering a mechatronical actuator as an example an approach is described which enables an initial assembly in small volumes at a small space. Due to the modular design a reduction of investment cost and the demand on economic entry in micro-assembly is accomplished.