Measure incoming pitch
Record the shortest credible gap and the line state that creates it.
Speed and product spacing
Packaging conveyor speed and product-spacing guide.
Separate surface speed, product pitch and production output. They are related, but they are not interchangeable, and each must be verified with the real product, transfer and connected machine.
Three different values
Define surface speed, product pitch and good output separately.
Surface speed is the movement of the conveyor belt, slat or chain. Product pitch is the distance from a repeatable point on one product to the same point on the next. Good output is the accepted quantity delivered by the complete process over time. A quotation or test plan should state which value is being specified.
For an idealised continuous stream, product rate can be related to surface speed divided by product pitch when consistent units are used. That relationship is a planning check, not a guaranteed production capacity. Slip, transfer behaviour, machine cycles, rejects, stops and accumulation change the real result.
Speed and pitch information schedule
| Value | How to define it | Why it matters |
|---|---|---|
| Conveyor surface speed | State the actual belt/slat movement or the agreed measured test condition. | Affects transfer energy, acceleration, stability and the available time for a process. |
| Incoming product pitch | Record minimum, normal and maximum centre-to-centre or leading-edge spacing. | Determines whether a downstream zone can create the required separation. |
| Required process pitch | Obtain the need from the coder, camera, checkweigher or packaging machine supplier. | Defines the gap and presentation that must be created and retained. |
| Good production output | Define accepted products over a stated period and line condition. | Separates saleable output from raw conveyor movement or machine nameplate rate. |
| Stop and recovery state | State stop duration, stored product, downstream readiness and release order. | Tests whether the required pitch survives an abnormal but foreseeable line state. |
Creating separation
Use speed zones only after the transfer and product contact are understood.
When a product moves from a slower zone to a faster zone, the second zone may pull it away from the following product. The achievable gap depends on how quickly the leading product is controlled by the faster surface, whether it slips and whether the next product remains on the slower zone. Tall, flexible, low-friction or irregular products may respond differently from a stable carton.
A large speed step can destabilise a product or create scuffing. A small speed difference may not generate enough separation. Where the next process requires precise pitch, test the full product range through the actual transfer and include incoming close products, gaps and restart conditions.
Define process need
Obtain the required stable pitch and presentation from the connected equipment.
Test the speed zones
Observe acceleration, slip, stability and retained spacing with limiting products.
Challenge recovery
Stop, block and restart the route using the agreed line sequence.
Detection and timing
Position sensors from the decision point and available response distance.
A photoeye may trigger a code, count a product, establish pitch, inhibit an upstream conveyor or track a reject. The mounting position should reflect the target area, product variation, background, stopping distance and control-system scan or response. Transparent bottles, reflective labels and close products require specific testing.
Keep operational product detection distinct from safety-related sensing. A normal photoeye or PLC timer must not be assumed to provide a safety function without the appropriate design and validation.
Use the controls and interlocks guide to document signal ownership, fault handling and restart order.
Acceptance boundary
State the conditions behind every accepted output or spacing result.
Record the product set, conveyor settings, connected-equipment simulation, test duration or repeat count, rejects and line-state assumptions. Do not present a short unloaded run or one ideal product as proof of sustained production performance.
The sample-trial guide and FAT/SAT checklist provide a structured way to retain that evidence.
Speed and product spacing
Common buyer questions
Use these answers to prepare the next technical decision or enquiry.
Is conveyor speed the same as packaging line output?
No. Surface speed describes conveyor movement; output also depends on product pitch, machine cycle, stops, rejects, accumulation and upstream supply.
How can product spacing be increased?
A controlled speed difference between conveyor zones may increase pitch, but the result depends on product slip, transfer geometry, incoming gap and acceleration. It must be tested with the actual product.
Why does a gap disappear before a machine?
Possible causes include an uncontrolled transfer, downstream deceleration, product collision, accumulation pressure, guide drag or the connected machine accepting products differently from the assumed sequence.
Can a VFD setting be used as the accepted conveyor speed?
A drive setting is useful configuration data but does not by itself prove actual surface speed or product result. Record the measured or observed condition required by the acceptance plan.
What pitch does a coder or checkweigher need?
The equipment supplier should define the required pitch, stability and timing for the actual product and process. The conveyor design then has to create and preserve that condition.
Why must stop and restart be tested?
Accumulated products can be released as a surge, close gaps or arrive before the downstream machine is ready. Controlled restart proves the complete line-state sequence, not only steady running.
Start your conveyor enquiry
Get a conveyor quoteSend the product range, line duty and available layout.
Include representative samples, the required good output, machine interfaces and any cleaning, access or guarding constraints so Lancing can review the conveyor duty.