During the screen production process 2 marks are inserted at specific locations on each screen. If the screen is inserted into the machine and positioned using the standard 3-point system, the two alignment points will be in the defined camera window.
The camera system detects the position of the alignment points and thus the position of the screen and moves the screen automatically to the desired position. This fine-positioning of the screen is located up to ± 15 μm.
Screen positioning |
|
Number of cameras | 2 |
Positioning accuracy | till +/- 15 um* |
Alignment mark |
round, white D: 1,5mm |
Alignment period | 1 - 2 s** |
Screen adjustment | electromotive |
Control | Siemens |
Camera resolution | 0,01 mm |
Alignment window | 12 mm x 12 mm |
* = machine-dependent
** = as a function of accuracy
With the first print 2 - 4 registration marks are printed. Each time you print the camera system detects the position of the registration marks of the first print. The air bearing printing-table with the fixed substrate moves to the desired position. After very precise alignment the printing table moves underneath the printhead and the substrate is printed.
By using the system, various alignment-scenarios can be selected (z. B. mediation in material- shrinkage).
Substrate positioning | |
Number of cameras | up 4 |
Positioning accuracy | till +/- 15 um* |
Alignment mark | flexible |
Alignment period | 1 -2 s** |
Table alignment | electromotive, air bearing |
Table power unit | servomotor |
Camera resolution | 0,01 mm |
Alignment window | 12 mm x 12 mm |
* = machine-dependent
** = as a function of accuracy
THIEME Corporation
3605 Swenson Avenue
St. Charles, IL 60174
Phone +1-630-513-1666
Fax +1-630-513-1999
info@thieme-us.com
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