IEC 62899-302-3-2021 pdf free

IEC 62899-302-3-2021 pdf free.Printed electronics – Part 302-3: Equipment – Inkjet – Imaging-based measurement of drop direction.
The jetted drop direction shall be determined by using one of the following methods, unless there is an agreement between the user and the supplier. In that case the method is fully reported with the measurement results.
All equipment engaged in the trajectory measurement shall have a carefully calibrated geometry.
The image plane shall be aligned in a precisely orthogonal direction to the inkjet nozzle plane before the start of the measurement.
4.2 Process for projected angle using one double flash drop watcher (method 1)
1) Establish reliable jetting from the nozzle under study in the image measurement region.
2) Record the images and analyse the drop image position changes for the chosen double flash delay.
3) Report the projected angle, using the formula provided in A.2.1.
4) Report the conditions as indicated in Clause A,3.
4.3 Process for projected angle using one single flash drop watcher (method 2)
1) Establish reliable jetting from the nozzle under study in the image measurement region.
2) Record a single flash image of a jetted drop and of the nozzle under study and analyse the drop and nozzle exit image positions. Alternatively, record two single flash images of two separate drops jetted at different times from the nozzle under study, and analyse the single flash drop image positions.
3) Report the projected angle, using the appropriate formula specified in A.2.2.
4) Report the conditions as indicated in Clause A.3.
4.4 Process for projected angle using one strobe flash drop watcher (method 3)
1) Establish reliable jetting from the nozzle under study in the image measurement region.
2) Record a strobe flash image, at a chosen flash delay time, of the nozzle under study and the superposed drops, and analyse the image positions of the nozzle exit centre and the superposed drops. Alternatively, record two strobe flash images, at two different delay times, of two separate drops from the same nozzle, and analyse the change of the single flash image positions.
3) Report the projected angle. using the appropriate formula specified in A.2.3.
4) Report the conditions as Indicated in Clause A.3.
4.5 Process for trajectory angles using two double flash drop watchers (method 4)
1) Establish reliable jetting from the nozzle under study in the image measurement region. with the image planes of the two double flash drop watchers having a wide angle between them aligned with a common axis along the reference direction.
2) Record double flash images of the same drop in each drop watcher for the chosen double flash delay times and analyse the drop image positions in each double flash drop watcher.
3) Report the trajectory angles, using the appropriate formula specified in A.2.4.
4) Report the conditions as indicated in Clause A.3.
4.6 Process for trajectory angles using two single flash drop watchers (method 5)
1) Establish reliable jetting from the nozzle under study in the image measurement region. with the image planes of the two single flash drop watchers having a wide angle between them aligned with a common axis along the reference direction.
2) Record single flash images of the same drop and nozzle exit at a chosen delay time in each drop watcher and analyse the image positions of the drop and nozzle exit centre in each single flash drop watcher. Alternatively, record images, at chosen delay times in each single flash drop watcher, of separate drops jetted from the nozzle under study, and analyse the single flash drop image positions in each drop watcher.
3) Report the trajectory angles, using the appropriate formula specified in A.2.5.IEC 62899-302-3 pdf download.