Sonics GXL - Manual (Page 32)

• • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • •
I N S T R U C T I O N M A N U A L • M O D E L G X L P O W E R S U P P LY
31
A U T O M A T I O N I N T E R F A C E & I / O C O N T R O L S
As listed below, there are several interface signals available for operating the
power supply via external digital control lines. These lines are used to initiate
a weld cycle and to monitor the operation (see External I/O Connection
drawing E-3164 in the Appendix).
1. Impulse Input – the impulse input signal is used to initiate a weld cycle
by external contact to ground. The contact must be closed for a minimum
of 50 milliseconds for the welder to recognize the command. Once
initiated, the weld cycle will proceed and the contact should be released.
The contact must be released before the end of the weld cycle; the system
will wait for the impulse contact to open before returning to the ready
screens for data presentation. The impulse input is expecting a dry
contact closure between J2 pin J and K (see Impulse Actuation Cable
drawing E-2703 in the Appendix).
2. Ready Output – when the system is ready to run a cycle, the ready signal
will be true. Any automation system should monitor this signal prior to
initiating a weld cycle with the impulse input. The ready signal will be set
false when a weld cycle begins. It will return true at the end of the weld
after the data has been written to the selected ready screen, the print line
has been sent (if ON) and the alarm signals have been examined and set.
In practice, automation controls should verify that the ultrasonic press is
up and out of the way before loading the next “parts-to-be-welded” into
the fixture and initiating another weld cycle. The ultrasonic system does
not require the press to return “Home” before the next cycle can begin, so
welding could possibly be initiated before the next parts-to-be-welded are
in the ready position.
3. Good Part / Bad Part Outputs – There are two outputs that indicate the
status of the last weld cycle. Both of these status signals are set false at
the beginning of a weld cycle when the ready signal is set false (to indicate
that a cycle is underway). One of these signals will be set true based on
examination of the alarm settings at the end of the cycle. If any alarm
examination points (process limits) have been violated, the Bad Part
Output will be set true. If there are no alarm violations or no limits have
been set, the Good Part signal will be set true.
The Good Part / Bad Part signals are meant to provide an external con-
troller with the information necessary to handle the previously welded part
in the automation environment. If the part is “good” then send it to the
Good part location, if it’s “bad” then recycle or remove it for further
examination.
The Good Part / Bad Part outputs will be valid prior to the ready signal
returning to true at the end of a cycle. The system should use the ready
Go To Top Of Document