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PCB reject stations: agree what happens when an inspection result is missing

A missing, late or mismatched result needs its own material-flow rule. Do not silently treat it as a passing board or assume the interface makes the decision.

Vanstron RE-460 model-reference context

Inspection routing

List the result states separately

Define the ordinary pass and reject states, then add missing result, late result and board-identity mismatch. Ask the quality owner to decide which material should be held for review. Do not replace this decision with an assumed default pass. A reject conveyor reference identifies a routing function but does not establish the meaning of every result state in the installed inspection and handling controllers.

Vanstron RE-460 model-reference context
Vanstron RE-460 published model reference for comparison. This is not an offered-unit photograph or a record of the checks described here.

Inspection routing

Identify where the result meets the board

Request the actual interface definition and the identifier used to associate a result with a physical board. Keep transfer permission separate from inspection disposition. A board-ready handshake is not, by itself, a documented inspection result. Ask which component retains the association during a pause and where an operator sees a mismatch. Preserve the supplier drawings and interface revision with the quote.

Inspection routing

Use the vendor-supported diagnostic procedure

Agree a commissioning test for each permitted abnormal state with the inspection and handling suppliers. Use their supported method to create or simulate the condition; do not improvise cable removal during motion. Record the board identifier, result state and observed destination or hold position. Confirm the approved recovery sequence before the board is released. A normal pass/reject clip leaves these exception states untested.

Vanstron DSUL NG-OK Unloader Family model-reference context
Vanstron DSUL NG-OK Unloader Family published model reference for comparison. This is not an offered-unit photograph or a record of the checks described here.

Inspection routing

Document who can resolve a held board

Assign authority for reviewing and releasing held material. Record the reason and any reinspection or corrected association. A cleared alarm does not automatically constitute quality disposition. Request the exact controller behavior and access permissions for the offered unit. Acceptance should retain the abnormal-state results alongside ordinary routing evidence, without claiming that a generic model catalogue proves the installed policy.

Technical Sources

Reference functions and configuration boundaries

The manufacturer references below support the equipment examples. The purchasing questions are an editorial decision framework, not measured LCSMT results or a machine-specific acceptance limit.

Vanstron · NG Reject Conveyor | AOI Conveyor

Vanstron · Dual Magazine NG OK Unloader for PCB

Prepare a useful RFQ

Connect the equipment choice to your actual assembly.

Share your board drawing, carrier format and intended line sequence. Ask for the exact offered configuration and the evidence needed to confirm fit.

Discuss handling requirements