Tissue Engineering is becoming more widespread as the technology improves, and involves the culmination of different disciplines from across the sciences. It involves growing tissue on man-made supporting structures, or scaffolds. The approaches for growing tissue range from a full bio-chemical method to a mechanically assisted method. This project will use the latter approach. Currently this method makes use of scaffolds which predominately are a gel structure or a bio-compatible polymer melt, dispensed in the required pattern and shape. The proposed scaffold used in this project is to make use of a polymer based scaffold as it has an advantage of providing the initial mechanical strength, which is an advantage in load bearing environments like the cartilage in the knee. To seed these scaffolds, small spheres of tissue or pellets are injected into pores formed by the scaffold. The project aims to develop a 3D printing and micro-assembly system to automated fabrication of bio-tissue.