System overview

Standard Knockoff

Sensor-timed reject for moderate-speed lines

SSI’s Standard Knockoff is a simple, reliable reject mechanism for moderate-speed conveyors. An upstream system asserts a fail digital output. The knockoff queues fail events and waits for the product to reach a trigger sensor at the reject point—then actuates the reject. Extend/retract confirmation sensors validate each cycle before the next reject.

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Standard Knockoff in production

SSI Standard Knockoff machine installed on the factory floor — Standard Knockoff platform tailored for reliable inline part handling and verification.

Alternate view of SSI Standard Knockoff machine — Machine layout supports repeatable throughput and straightforward line integration.

What it solves

Cost-effective pass/fail enforcement at a reject point
Straightforward I/O integration to upstream inspection
Reliable reject cycling with actuator confirmation

How it works

Latch fail — Upstream fail output is queued.
Detect product — Product hits the trigger sensor at the reject point.
Actuate — Knockoff extends; extend sensor confirms stroke; then it retracts.
Complete — Retract sensor confirms cycle; next queued reject is ready.

Included vs optional

Included

Fail input + queue logic
Trigger sensor timing with adjustable delay
Extend/retract confirmation sensing

Optional

Stack light and alerting integrations
Additional ready/fault handshakes
Custom discharge/reject conveyor interface

Project inputs (for scoping)

Product size/weight and line speed
Minimum spacing between products
Reject discharge constraints (bin/chute/conveyor)
Trigger source + interlock requirements