@2021 Raycus Corporation
10
1)
Marking machine
sends
the command to the laser machine by the Pin2 on the
DB25 port, meanwhile sends the clock signal to the Pin3. The comment is the
binary form, and delivers the most significant bit as the priority.
2)
The order structure from marking machine to the laser machine is:
0xA5+instruction code.
3)
0xA5
（
A5h
）
is the comment byte to active the laser pulse duration control port.
0xA5 and the following data will be directly sent as the serial input form to the
Pin2 on the DB25 port.
4)
The input data length is 4 bytes: the first byte of instruction code should be 0x01
（
01h
）
,the second byte and the third byte are the value of the binary coding of
laser duration (for example: 200 is the decimal number of 0x00C8, represents the
setting pulse duration is 200ns).
5)
Pin22 is the Enable signal. The Enable should achieve high state at least 10us
before Pin2 and Pin3 changing. The Enable should achieve low state at least 10us
after Pin2 and Pin3 changing. Figure 14 shows the adjustment process of laser
duration control.
6)
Pin19 should decrease to low state before adjusting laser pulse duration.
7)
Optional pulse width :10\20\30\60\100\200\250\350ns.
Figure 10. Schematic of laser pulse duration adjustment
（
200ns
）
