Before buying, ask an automatic packaging machine supplier for verified running speed with your real product, package-size limits, changeover time, reject criteria, utility consumption, control-component brands, spare-parts lead times, warranty scope, and FAT/SAT conditions. A machine rated at 100 packs per minute produces 48,000 theoretical packs in an 8-hour shift, but at 85% effective runtime that falls to 40,800. A 2% reject rate removes another 816 packs. Ask the supplier to put sustained speed, acceptable reject rate, seal quality, dosing tolerance, and test duration in writing. Also request safety documentation based on applicable machinery standards; ISO 12100:2010 remains a current reference for machinery risk assessment and risk reduction after confirmation in 2022.

Start with the product rather than the machine brochure. Give the supplier actual samples plus minimum, nominal, and maximum dimensions, weight range, temperature, surface condition, moisture level, and expected hourly output. If a product is nominally 500 g but ranges from 485 to 515 g, the feeding and dosing system must work across a 6% total weight range without creating frequent stops or poorly formed packs. Ask for a trial using production-grade material rather than a convenient substitute.

That product trial should lead directly to the speed discussion. “Up to 120 packs per minute” is not the same as 120 acceptable packs per minute for eight hours. Request three numbers: mechanical maximum, recommended continuous speed, and demonstrated speed with your product. At 90 packs per minute, theoretical output is 43,200 packs per 8-hour shift; at 80% effective runtime, usable opportunity falls to 34,560 before rejects are counted.

Ask the supplier to define the conditions behind every speed figure: package length, product weight, film structure, sealing temperature, feeding method, test duration, and acceptable reject level.

Runtime deserves as much attention as nameplate speed. PMMI’s 2026 OEE survey covered 35 industry respondents; 93.8% identified downtime as the most commonly tracked KPI in their OEE offerings, while 45.7% reported offering customers an OEE-tracking solution. A buyer should therefore ask how the machine records stops, fault codes, output, rejects, and production time, then check whether those records can be exported to the plant’s reporting system.

Once output is defined, ask how packaging material changes it. Send the exact film specification, including structure, thickness, roll width, maximum roll diameter, core diameter, sealing layer, coefficient-of-friction requirements where relevant, and registration-mark details. A 5% reduction in usable output caused by unstable film tracking would remove 2,160 packs from a theoretical 43,200-pack shift, even though the machine’s quoted cycle rate has not changed.

Material compatibility also affects future package changes. Ask for the minimum and maximum bag width and length, then identify which formats require forming sets, sealing jaws, guides, conveyors, or software recipes. If a plant runs 12 SKUs and performs four 20-minute changeovers each day, 80 minutes of scheduled production time disappear daily. Cutting each changeover to 10 minutes returns 40 minutes, or about 167 hours over 250 production days.

A useful quotation should therefore state changeover requirements rather than simply saying “easy format change.” Ask whether adjustments are tool-free, whether positions have scales or digital indicators, how many settings are stored in recipes, and which components must physically be replaced. Have the supplier demonstrate one complete changeover during acceptance testing, including removal, installation, parameter selection, first-pack adjustment, and return to stable production.

Stable production then needs measurable quality limits. For a filler, ask for dosing tolerance across the specified operating range. For wrapping equipment, define seal position, package length, print-registration tolerance, empty-pack handling, damaged-product criteria, and rejection logic. A 1.5% reject rate equals 15,000 rejected packs per million produced; at 0.5%, the figure is 5,000. The difference is 10,000 packs for the same production volume.

After quality limits are established, examine utilities and factory fit. Ask for installed electrical power, normal operating demand, voltage, phase, frequency, compressed-air pressure, air consumption, vacuum demand, extraction needs, and environmental limits. A 10 kW machine operating 4,000 hours per year represents 40,000 kWh at full 10 kW demand; actual consumption depends on operating conditions. The quotation should distinguish installed capacity from expected consumption rather than presenting one unexplained number.

Floor-space information needs similar detail. A machine measuring 2.5 × 1.5 m occupies 3.75 m² physically, but maintenance doors, film-roll loading, operator access, electrical cabinets, conveyors, and guarding can require considerably more usable floor area. Ask for a scaled layout showing service clearances, product flow, operator positions, utility connection points, and door swing. That drawing should then be compared with upstream and downstream equipment.

Integration questions follow naturally because an automatic packer rarely works alone. Give the supplier interface details for weighers, fillers, conveyors, printers, checkweighers, metal detectors, labelers, case packers, or palletizing equipment. Specify line speed, conveyor height, product direction, accumulation requirements, and communication method. If a line is expected to deliver 70 packs per minute but one downstream unit accepts only 60, the nominal upstream capacity is commercially irrelevant.

Electrical and software interfaces deserve written definitions as well. Ask which signals cover ready, run, stop, fault, low-product demand, downstream blocked, emergency stop, and reset. Request the proposed industrial communication protocol and I/O list before manufacture. ISO 13849-1:2023 addresses safety-related parts of machine control systems, including safety functions and software-related design requirements, so safety communication should not be treated as ordinary production I/O.

That leads to component selection. Ask for manufacturer and model information for the PLC, HMI, servo motors, servo amplifiers, variable-frequency drives, safety controller, sensors, pneumatic valves, temperature controllers, power supplies, relays, and other production-critical components. If a €50 sensor can be sourced locally in 24 hours while a proprietary alternative takes three weeks, purchase price alone gives a poor picture of maintenance exposure.

Ask which components are proprietary, which have standard commercial equivalents, and which the supplier expects to become difficult to source during the machine’s planned service period.

Software access belongs in the same discussion. Confirm whether the plant receives PLC and HMI backups, servo parameters, recipe backups, electrical schematics, pneumatic drawings, alarm lists, I/O documentation, passwords at the agreed maintenance level, and restoration instructions. A failed HMI in year 4 should not turn into several days of downtime because nobody at the plant has the correct project file.

Maintenance planning comes next. Request tasks by daily, weekly, monthly, 6-month, and annual intervals, including lubrication, belt inspection, sealing-jaw inspection, filter replacement, pneumatic checks, sensor cleaning, calibration, and safety-device testing where applicable. If scheduled maintenance takes 2 hours every 500 operating hours, a machine running 4,000 hours annually requires at least 16 hours for that task alone, before cleaning and unplanned repairs.

Use the maintenance schedule to build a spare-parts list before shipment. Separate consumables, normal wear parts, and production-stopping parts. Ask for part number, quantity, price, expected replacement interval where predictable, and typical lead time for heaters, thermocouples, cutters, belts, seals, sensors, pneumatic components, servo equipment, and control hardware. A lower machine price can be offset by 20% higher annual parts expenditure over several years.

Service response should be quantified in the same way. Ask when technical support operates, where engineers are based, whether remote diagnostics are available, and what happens after remote support fails. Define who pays labor, travel, accommodation, freight, and customs costs during warranty. When comparing an automatic packaging machine supplier with another vendor, compare the complete service scope under the same operating assumptions rather than comparing equipment prices alone.

Warranty wording should follow the service discussion. Check whether the warranty begins at shipment, delivery, installation, commissioning, or final acceptance. A 12-month warranty beginning at shipment can lose several weeks to freight, installation, and startup. Ask which wear components are excluded, who pays replacement-part freight, whether labor is included, and what documentation is required before a claim is approved.

Safety documentation should be reviewed before the machine reaches the plant. ISO 12100:2010 sets out machinery risk-assessment and risk-reduction principles covering hazard identification, risk estimation, evaluation, reduction, documentation, and verification; ISO states that the 2010 edition was confirmed in 2022. Ask for the machine risk assessment, guarding information, safety-function documentation, electrical drawings, emergency-stop arrangement, and applicable declarations for the destination market.

The control system should receive the same scrutiny. ISO 13849 documentation covers safety-related control functions, while ISO 13849-2 addresses validation through analysis and testing. Ask how guard interlocks, emergency stops, restart prevention, manual reset, and other applicable safety functions were validated, and request records appropriate to the supplied machine rather than a generic certificate from another model.

With safety and specifications agreed, write a Factory Acceptance Test around measurable results. Avoid “machine runs well.” A stronger requirement states the product, film, target rate, test duration, acceptable rejects, package-quality checks, alarm tests, and changeover procedure. For example, a 2-hour run at 80 packs per minute represents 9,600 theoretical cycles, providing far more information than a five-minute demonstration of 400 cycles.

Use several production samples where product variation matters. If three SKUs differ substantially in dimensions or handling behavior, testing only the easiest one leaves the other two unverified. Test minimum and maximum package formats when practical, record good packs and rejects separately, and retain samples from the beginning, middle, and end of the run. Acceptance should be based on the agreed measurement method, not visual impressions.

Site Acceptance Testing should then repeat the relevant checks after installation. Plant utilities, real upstream flow, downstream equipment, operator handling, and factory conditions can differ from the supplier’s workshop. If FAT output was 80 packs per minute but site output reaches only 64, the gap is 20%. The SAT plan should show how both parties determine whether the cause sits with the packaging machine, utilities, product supply, material, or connected equipment.

Training should be specified before SAT closes. Ask how many operators and maintenance technicians can attend, how many hours are included, and whether training covers startup, shutdown, film loading, recipes, format changes, alarm recovery, cleaning, preventive maintenance, electrical diagnosis, pneumatic diagnosis, backup restoration, and component replacement. For a three-shift plant, training only one operator group can leave 66% of shifts dependent on second-hand instruction.

Finally, compare the purchase on a multi-year operating basis. Combine machine price with estimated packaging waste, electricity, compressed air, wear parts, scheduled service, changeover losses, labor, and expected downtime. A machine producing 40,000 good packs per shift at 98.5% quality loses about 600 packs relative to perfect quality; at 99.5%, the loss is about 200. Across 250 shifts, the difference reaches roughly 100,000 packs.

Put the figures that matter into the purchase specification: sustained good-pack rate, product and package ranges, agreed materials, quality tolerances, changeover method, utilities, component brands, documentation, training hours, FAT/SAT procedures, warranty start point, service terms, and spare-parts scope. A specification that can be measured during FAT and SAT gives both buyer and supplier the same acceptance basis, reducing arguments over what a sales phrase was supposed to promise.