We purchased a robot and track from a second hand robot supplier, the robot is an irb6400r s4c and the track seems to be an IRBT6004. The robot was made in the year 2002 however the track seems to be a newer version made in 2014. the track also seems be be made up from several different tracks as there are stickers on some sections saying IRBT6004 and then on others IRBT7004 and then on others IRBT4004. From what I can tell the sections of track seem to be the same no matter what sticker is on them.
the difference I have found is in the rack itself that the pinion drives on. I have found two different types there is one type that measures 54mm from the base of the rack to the top of the teeth and there is another that is 55mm. This seems to be giving me issues with back lash and unwanted movement. I have attached a photo of both types below
Does anyone know which is the correct size to be use? Iv laid the two on top of other with the teeth meshing and the pitch seems to to be the same for both types.