Each element in TrySim has got a position, identified by three coordinates (X,Y,Z). Internal these values are saved and processed in micrometers, the edit mask often just shows mm.
Internal the position is always measured with the distance to the 'origin'. This element that you can only see in the element tree has got per definition the coordinates:
X = 0.000 mm
Y = 0.000 mm
Z = 0.000 mm
The numbers quickly turn confusing for a human user in case of huge machines. Who on earth can see at first glance that the distance of two boxes with the positions X=650021 and X=649001 is quite exact 1 m?
Therefore there is the possibility in TrySim to determine a reference point ever-changing. This definition has nothing to do with the internal storage and has no influence on the simulation. All displayed data is converted so that you can read it more easily.
If you choose the box_1 as reference point in the example above then it has got the X position '0'. This is easy to remember.
For the box_2 then the X position '1020' is shown, about 1 m.
Sometimes the end of the element is more interesting than the beginning. For that reason, you can switch from 'bottom left' to 'top right' with a symbol in the working rail. This is very useful if you have to solve a positioning problem like: 'This light barrier is 50 mm before the end of the conveyor'.
See also: