What does speed compensation do and how is it set ?
There is always a time or delay between the electronic signal and the actual mechanical occurrence of for example opening a gate (vacuum building, inertia), triggering an inkjet and when the drop hits a moving paper, etc.
The faster the product moves, the more one notes the delay.
To compensate for that, the EditorGT has a linear speed compensation for each tracker.
It will compensate according to the line speed. In the example above, let us say that the distance between photocell and inkjet is 202 mm.
At low speed, we want to release the trigger 202 mm after the photocell has seen the edge of the product. Conversely, at high speed, we want to release the trigger 197 mm after the photocell has seen the edge of the product, i.e. is 6 mm earlier. Thus, compensating for the flight time and other delays of the drop by triggering earlier.
Remember, don’t try to compensate with the inkjet and the controller. Either one or the other.
In the example above, let’s assume that at slow speed (0.2 meters per second) the inkjet prints 5 millimeters from the edge, at high speed (2 meters per second or 2’000 millimeters per second) the inkjet prints 10 mm. from the edge.
That is you want to know.
In the encoder, you input the maximum speed.
In the inkjet (or any other tracker), you enter the difference between fast and slow : 11 – 5 = 6.
Good speed compensation !