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4.8.
Error Conditions
Some of the common error conditions encountered during pressing are detailed below. The error conditions
generated by the Profile program are user defined, so the wording can vary. In addition, new error conditions
not covered here may be introduced.
Premature Contact -
This error is generated by the Profile program and is likely to be the most common error
condition that is encountered during normal operation. It occurs when the pressing tool makes contact with the
connector before it should. The contact force and position thresholds are defined in the Profile for the
connector. Here are some of the possible causes:
—
The connector is tilted too much for the tool to enter cleanly
—
The pressing tool hit a bent pin in the connector
—
The connector and tool are keyed and the connector is in wrong
—
The wrong connector is in the current position
—
The PCB is in the wrong position
—
There is a position error in the Press Data File (*.pdf)
—
There is an error in the Press Profile program (*.prs)
When this condition is encountered, the press head will rise up to the board clearance position and display a
message. Careful inspection will usually reveal the problem. If the error is generated the first time a new
program is run, expect a position error has been entered in the Press Data File. In some cases it is OK to use
the “Retry” option in case the connector was tilted and the tool correct
ed the lean when it touched it. Use
caution when retrying because if there is a bent pin the retry may bend it over further and press it flat to the
connector bottom.
Missing Connector -
This error is generated by the Profile program. It will be obvious if a connector is missing.
If the connector is not missing, there is an error in the Profile program, which must be corrected by the
programmer.
Excess Force -
This error is generated by the Profile program. It is displayed when the force required to seat
the connector exceeds the programmed limit. There may be a problem with the connector or PCB causing too
much resistance before the connector reaches its seated height. The fixture could be too thick causing the
connector to contact the PCB higher than expected. There may be a problem with the force or height
definitions in the Profile program.
Insufficient Force -
This error is generated by the Profile program. It can be caused by a loose pin to hole
interference. It can also be caused by the platen being too thin, connector thickness problems, or Profile
program errors. The programmer should be consulted to correct the problem.
4.9.
Runtime Help Screen
This is the screen that can be brought up by pressing the F1 Key while in the 'Runtime mode' to assist in
Diagnostics of Profile performance. Also, this screen will indicate to you how to start the Data Collection mode
that creates a file defining 'point by point' performance within the press profile and logs this file to the SPC
Directory within the Press computer hard drive. See Figure 11.
