Installation planning

What does a multihead weigher installation need before delivery?

Plan the support, product feed, access, utilities, controls and downstream pack interface before the equipment arrives on site.

Direct answer

A multihead weigher installation must be planned as a product-feed, weighing, support and packing-line project.

A practical installation brief confirms the working envelope, support structure, access, product supply, utilities, discharge path, controls handshake, cleaning method and acceptance process before delivery. The weighing head cannot be assessed in isolation because an unstable feed, unsuitable drop, restricted access or an incomplete bagger interface can limit the finished line even when the weigher itself is operating correctly.

Support, access and working height

Confirm the support frame or gantry, safe access to product-contact parts, operator reach, maintenance clearance, removal routes for hoppers and trays, and the path used to bring the machine into position. The installation drawing should show both the machine footprint and the clearance needed to work around it.

Upstream product feed

Define how bulk product reaches the dispersion area, how product level is controlled and how the upstream feeder responds when the weigher needs more or less product. A reliable machine can still be starved, flooded or unevenly loaded by an unsuitable feed arrangement.

Downstream packing interface

Confirm the receiving chute, timing hopper, VFFS or pouch-machine opening, ready-to-discharge signal, dose-complete signal, fault state and safe restart sequence. The discharge path should protect the product and keep it away from the sealing area.

Site-readiness worksheet

Confirm the physical, electrical and control boundary before the machine arrives.

The exact requirements depend on the selected equipment and line. The list below is a project-preparation framework rather than a model specification.

Project areaWhat to confirmEvidence to retain
Layout and accessFootprint, working envelope, operator position, maintenance access, lifting route and floor loadingApproved general-arrangement drawing and site photographs
Support structureGantry or frame height, guarding, stairs or platform, vibration and fixing methodStructural review and approved interface dimensions
Product supplyBulk feed method, refill control, product-level signal and isolation pointsFeed sequence and product-flow trial observations
UtilitiesElectrical supply, compressed air where used, network or control connections and isolation locationMachine-specific utility schedule from the approved supplier documentation
Pack interfaceChute, receiving opening, drop height, timing hopper, bagger or pouch-machine cyclePack drawings, film or pouch samples and interface drawing
ControlsReady, request, dose-complete, inhibit, fault, emergency stop and recovery logicFunctional description and input/output schedule
CleaningRemoval route, wash or dry-clean method, drainage where applicable and allergen/changeover boundaryCleaning procedure and access review
AcceptanceRepresentative product, target weights, output definition, pack quality and fault-recovery checksFAT/SAT protocol and signed results
Installation sequence

Move from drawings to a controlled site acceptance test.

1

Freeze the product and pack basis

Record the product range, target weights, normal variation, pack dimensions and required output. Installation decisions made before the product and pack are defined often need rework later.

2

Approve the mechanical interfaces

Confirm the bulk-feed connection, support frame, chute or timing hopper, packer opening, access and guarding before fabrication is finalised.

3

Approve the control sequence

Document what requests product, what permits discharge, how a completed dose is confirmed, and how the line behaves during stops and faults.

4

Prepare the site and utilities

Complete supports, access, isolators, services and cable routes against the approved machine documentation rather than assumptions from a similar installation.

5

Commission with representative product

Use normal product and packs, not only an easy sample. Record feed stability, weights, pack presentation, delays, faults and recovery.

6

Close the handover evidence

Retain approved drawings, settings, training records, cleaning information, spares information and the agreed acceptance results.

Common installation questions

Questions to resolve before site work begins.

Does every multihead weigher need a gantry?

No. The need for a gantry depends on the machine height, receiving equipment, required drop, access and existing line layout. Some compact arrangements can sit lower, while higher-speed bagging lines may require a support platform. The correct decision must be based on the actual general-arrangement drawing.

What utilities are needed for a multihead weigher?

The required electrical supply, compressed air, network and control connections are machine-specific. Do not assume them from another model. Request the approved utility schedule and identify isolators, cable routes and connection points before delivery.

How much maintenance access should be allowed?

Allow enough space to remove contact parts, open covers, inspect drives and load cells, clean safely and move replacement parts. The working envelope is normally larger than the machine footprint, so access should be shown on the layout drawing.

What is the difference between FAT and SAT?

A factory acceptance test checks the agreed machine and line functions before dispatch. A site acceptance test confirms that the installed equipment, utilities, interfaces and product run work in the production environment. The same measurable criteria should carry through both stages where practical.

Who should define safe isolation and maintenance access?

The final arrangement must be assessed by competent people against the actual machinery and site. The UK Health and Safety Executive advises that plant should be made safe and energy sources isolated before maintenance. See the HSE guidance on maintenance of work equipment.

What should be sent for an installation review?

Send a representative product, target weights, pack drawings, required output, available layout, ceiling height, upstream and downstream details, utility information and any site restrictions. Lancing can then identify which dimensions and interfaces need formal confirmation.

Prepare the site brief

Send the layout, product and pack route before the installation is frozen.

Use the existing enquiry form to share the product, target weight, packing machine, available space and expected line sequence.

Request an installation review
Related guidance

Continue from installation planning to acceptance and operation.