A wet bench apparatus, comprising: a container; and a first robot (8, 52) comprising: a first arm movable in a horizontal direction of the container; a second robot (10, 54) comprising: a second arm movable in the horizontal direction of the container, wherein the first arm and the second arm are adapted to move items vertically, characterized in that the second arm is adapted to move past the first arm wherein the wet bench apparatus further comprises a first cam follower system configured to move the first arm horizontally, the first cam follower system comprising at least one cam roller (40, 42) positioned between a first guide bar and a second guide bar and configured to resist moment from the first arm of the first robot (8,52); and a second cam follower system configured to move the second arm horizontally, wherein the second cam follower system comprises at least one cam roller (40, 42) positioned between a third guide bar and a fourth guide bar and configured to resist moment from the second arm of the second robot (10, 54); wherein the first arm and at least one first item are positionable in a user specified orientation to move without contacting the second arm and at least one second item. a container; and a first robot (8, 52) comprising: a first arm movable in a horizontal direction of the container; a second robot (10, 54) comprising: a second arm movable in the horizontal direction of the container, wherein the first arm and the second arm are adapted to move items vertically, characterized in that the second arm is adapted to move past the first arm wherein the wet bench apparatus further comprises a first cam follower system configured to move the first arm horizontally, the first cam follower system comprising at least one cam roller (40, 42) positioned between a first guide bar and a second guide bar and configured to resist moment from the first arm of the first robot (8,52); and a second cam follower system configured to move the second arm horizontally, wherein the second cam follower system comprises at least one cam roller (40, 42) positioned between a third guide bar and a fourth guide bar and configured to resist moment from the second arm of the second robot (10, 54); wherein the first arm and at least one first item are positionable in a user specified orientation to move without contacting the second arm and at least one second item. wherein the wet bench apparatus further comprises a first cam follower system configured to move the first arm horizontally, the first cam follower system comprising at least one cam roller (40, 42) positioned between a first guide bar and a second guide bar and configured to resist moment from the first arm of the first robot (8,52); and a second cam follower system configured to move the second arm horizontally, wherein the second cam follower system comprises at least one cam roller (40, 42) positioned between a third guide bar and a fourth guide bar and configured to resist moment from the second arm of the second robot (10, 54); wherein the first arm and at least one first item are positionable in a user specified orientation to move without contacting the second arm and at least one second item.