Hitachi UX2 - Product Speed Matching Function Without a Rotary Encoder

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4.3.5 Product speed matching function without a rotary encoder
4.3.5-1 Auto product speed matching function
Auto product speed matching function is used for detecting the change of speed of the conveyer carrying
print target using the print target detector connected to the IJ printer, and prints each vertical line of the print
according to the change of speed in the same way as the Speed matching function using a rotary encoder.
Ensure to confirm the print start position and check for the slip of the print target by thoroughly testing before
using this function. If the print start position or the character width of print vary widely as a result of the test,
use the Speed matching function using a rotary encoder.
Cases that the speed can not be matched
No.
Conditions of use
1
In case the print target slips on the conveyer between after the print target passes the print target detector
and before IJ printer complete printing.
2
In case the carrying speed changes or the conveyer stops between after the print target passes the print
target detector and before IJ printer complete printing.
4.3.5-2 Print target detector
● Use a no-contact (transistor) output type print target detector with a photoelectric sensor with built-in
amplifier which detects the target using the optical beam.
● To start the print from the edge of the print target, place the print target detector so that the "Distance
between the print head and print target detector" is larger in width than print target.
4.3.5-3 IJ Printer setup
● Configure the setting for "Product speed matching", "Print target width", and "Actual print width" on "Print
Specifications" screen. (See Chapter 5.7 "Set the print specifications" in the Instruction Manual)
● Set "Auto" for "Product speed matching".
● Enter "Print Target width" and "Actual Print width" in mm.
The value for "Actual Print width" must be smaller than "Print Target width".
● "Enable" the "Speed compensation" as required.
CAUTION
● When "Speed compensation" is enabled, the print start position is delayed 2 scans because calculation is
performed to reduce the change of the print start position.
● The position accuracy of the print start position may be worse than the product speed matching function
using a rotary encoder, because calculation is performed by sensing the print target detector.
● When "Sensor filter" in "Print Specification" is set to "print completion", it will be automatically corrected to
"time setting". In addition, the time setting value should be set to the time when the sensor filter function
terminates before the printing material sensor passes through the printing object.
● Because it cannot be used at the same time as the repeat print of "Printing specification",
it is automatically set to disable of repeat print.