The Tessella robot mounting plate is designed to accurately locate the Meca500 robot atop the PISMO 600 or PISMO 1000 surface. The plate is precision machined with locating pins aligning the x and y axis of the robot base resulting in a pre-calibrated position. The robot module plate can be moved to any location about the 3 X 3 or 5 X 5 array giving it repeatable position to 20uM.