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Buyer and engineering guide

Centrifugal feeder specification checklist.

Define a measurable production outcome before selecting the feeder, tooling, outfeed and control architecture.

Quick answer

What should a centrifugal feeder specification include?

A complete centrifugal feeder specification defines the approved component range, accepted discharge orientation, sustainable feed rate, production environment, bulk loading, interface, controls, guarding, trials and acceptance evidence.

The aim is to make success testable. “Feed this part quickly” is not a sufficient requirement. “Deliver approved components open-side down at 240 accepted parts per minute to the escapement sensor for 30 minutes under normal hopper replenishment” creates a measurable boundary.

Use one acceptance sentence

Write a single sentence stating which parts must arrive, in what condition and orientation, where they are counted, at what sustainable rate and under which test conditions.

1 · Component definition

Approve the real production range.

Tooling is designed around component behaviour, so the specification must identify variation as carefully as nominal dimensions.

InformationWhat to recordRisk controlled
Part identityDrawing number, revision, photographs and sample reference.Prevents an unapproved revision entering the acceptance scope.
Dimensions and massNominal values, tolerances and natural production distribution.Highlights small differences that can affect selection and transfer.
Material and finishPolymer or metal grade, texture, coating, oil, moisture and cosmetic class.Guides contact materials, cleaning and marking assessment.
VariantsEvery size, colour, cavity, supplier, revision and batch condition.Ensures the approved rate applies to the complete production family.
Bulk behaviourNesting, tangling, bridging, static, fragility and contamination.Shapes hopper, metering, separation and recirculation design.
2 · Accepted output

Define orientation, rate and condition together.

Output is only valuable when the receiving machine gets usable parts. These boundaries belong in the same acceptance definition.

Position

Face-up, open-side down, axis-aligned, upright or another defined presentation.

Rotation

Leading feature, angular tolerance or rotational freedom accepted by the next process.

#

Rate

Accepted parts per minute at the named hand-off point, not parts circulating in the bowl.

Spacing

Minimum pitch, queue condition or escapement-ready separation required downstream.

Condition

Permitted marking, damage, dust, contamination or deformation after handling.

T

Test boundary

Duration, replenishment, sample mix, interventions and downstream simulation.

3 · Bulk loading and unattended running

State how long the system should run between operator refills and how parts arrive at the machine. Hopper volume is not the only consideration: loading height, safe manual handling, batch traceability, component pressure and controlled metering into the bowl all affect the solution.

4 · Mechanical interface

Record the outlet position, height, direction, track type, available footprint and the exact receiving point. Include tolerances for machine movement or format change. Identify who supplies stands, joining sections, supports, guarding and installation hardware.

Use an annotated orientation and hand-off definition rather than an ambiguous description.

5 · Electrical and control interface

Define available power, control voltage, run demand, ready, low-level, full-track, blocked-outlet and fault signals. State how emergency stop, guard circuits and restart sequencing interact with the wider line.

6 · Environment and access

Include cleaning method, dust, moisture, temperature, noise target, material restrictions and controlled-area requirements. Confirm access for tool changes, cleaning, inspection, jam recovery and preventive maintenance.

7 · Changeover and recipes

For a component family, identify change parts, settings, tools, expected duration, recipe control and line-clearance checks. Each approved variant needs its own acceptance result or a clearly stated common boundary.

If camera verification is required, include the visible feature, image view, good and reject samples, no-read rule and reject confirmation. Read the feeder vision inspection guide.

8 · FAT and completion

Turn the specification into evidence.

The factory acceptance test should reproduce the agreed boundary and record the results needed for a confident production decision.

Identify

Confirm sample references, machine configuration and test instruments.

Run

Operate for the agreed duration with normal replenishment and demand.

Challenge

Test full, empty, blocked, stop, restart and recovery conditions.

Measure

Record accepted output, rejects, interventions and component condition.

Close

List actions, documentation, training and final responsibilities.

Specification FAQ

Questions that make the requirement testable.

What information belongs in a centrifugal feeder specification?

Define the approved component range, required orientation, accepted parts per minute, sample and test conditions, bulk autonomy, outfeed interface, controls, environment, guarding, documentation and acceptance criteria.

Should feed rate be stated as parts per minute?

Yes, but define accepted parts per minute at a named discharge point. Include test duration, replenishment, downstream demand and permitted operator interventions so the figure represents sustainable production.

How many samples are needed for a feeder trial?

Quantity depends on the bowl, target rate and test duration. The sample set must support realistic bulk loading and repeated running while representing every variant, batch, cavity, supplier and normal production condition.

What is an accepted part?

An accepted part is a component delivered at the agreed interface in the correct position, rotation, spacing and condition. The definition should state the tolerance and how acceptance will be detected or measured.

What should a feeder FAT test?

The factory acceptance test should cover sustained rate, orientation, replenishment, full and empty conditions, blocked outfeed, stop and restart, fault recovery, changeover where applicable and agreed documentation.

Who is responsible for the machine interface?

The specification should assign mechanical, electrical, control, guarding, installation and commissioning responsibilities between the feeder supplier, integrator and customer before detailed design begins.

Technical guide reviewed by Sortation Solutions · Updated 1 September 2026

Start with the component

Need reliable orientation at production speed?

Send a part photograph or drawing, required orientation, target sustained output and details of the receiving machine. We will define the right next step.

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