Illinois Tool Works IJ300, Руководство по эксплуатации

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Controller
Appendix B: Theory of Operation
5760-121 Operations Manual Rev B Page 79 of 115
Impulse Jet Print Head Interface Board
The Impulse Jet Print Head Interface Board controls the print head daisy chain, and it is the
power entry point for the print heads and the rest of the system (See the previous section
on
Power .) The Print Head Interface Board also contains the photosensor, external
encoder, and CIDS connections.
The daisy chain controller is made up of an FPGA (U6) and print image RAM (U4). The
print image is written to image RAM by the CPU board, and circuitry on the FPGA reads
the print image and shifts it out to the print heads. The generation and timing of all daisy
chain signals - DATA, CLOCK and LATCH - take place in the FPGA in response to signals
from the photosensor and encoder.
Test Points: TP1: 5VDC.
TP2: 3.3VDC.
TP3: 2.5VDC.
TP4: GND.
TP5: (FPGA) PROGRAM; pulses low to initiate FPGA programming.
TP6: (FPGA) INIT; goes LOW to indicate an FPGA programming error.
TP7: (FPGA) DONE. LOW when the FPGA is being programmed. High
when FPGA programming is complete.
TP8: CIDS error signal, active low.
TP9: Print head vacuum signal, active high.
TP10: CIDS ink low signal, active low.
TP11: Print head pump signal, active high.
TP12: CIDS ink out signal, active low.
TP13: Print head at temperature signal, active high.
TP14: CIDS vacuum signal, active low.
TP15: Print head ink out signal, active high.
TP16: CIDS pump signal, active low.
TP17: DC power in (24V).
TP16 TP12 TP14
J1
J2
TP5
TP7
U4
U6
TP17 TP4 TP10 TP18 TP9 TP11
TP20
TP21 TP19 TP13
TP8
TP15
TP23
TP22
J5 J3
P1 P2 P3
TP3
TP2
TP6 TP1
U2
IMPULSE JET
INTERFACE BOARD