Keep product depth comparable.
Uneven hopper level or different product condition can make one channel consistently faster or less stable than the other. Refill method should be part of the trial.
Verified Lancing model reference
Lancing LU-DL5000D dual-head weigh filler.
A semi-automatic dual-channel vibratory weighing route for free-flowing dry products, using two product hoppers and a common discharge into an operator-presented pouch, bag or suitable container.
Dual-channel weighing
Use the second channel to improve the complete cycle, not just the discharge count.
The LU-DL5000D reference provides two hoppers and two vibratory weighing channels with a common discharge. It is intended as a higher-capacity semi-automatic route for suitable free-flowing grains, seeds, crystals and small granules.
Dual channels do not automatically double accepted output. The complete result still depends on product refill, target weight, pack opening, operator presentation, discharge clearance and downstream sealing or removal.
| Reference weighing range | 100–10,000 g. |
|---|---|
| Published output reference | Approximately 20–30 bags/minute, dependent on product, target weight and operator handling. |
| Supplier accuracy reference | Approximately 2–6 g, dependent on the product and operating conditions; confirmation requires a representative trial. |
| Reference hoppers | Two hoppers of approximately 25 litres each. |
| Reference power | Approximately 460 W; final UK electrical requirements must match the quotation and supplied build. |
| Reference machine size | Approximately 720 × 700 × 1370 mm. |
| Reference product basis | Free-flowing, non-sticky grains, seeds, crystals and small granules, subject to sample approval. |
Dual-head cycle
Balance both weighing channels and the common discharge.
Each channel needs stable product feed and a clear relationship with the pack position. A bottleneck at the common outlet or in the operator cycle can remove the theoretical benefit of the second head.
Verify each head independently.
Zero, mechanical isolation and reference-weight checks should be completed for both channels before a combined production trial.
Protect the pack mouth and transfer path.
The complete dose must clear the shared discharge without collision, overlap, residue or product bounce outside the pack.
Application fit
Check flow, dose volume and bag handling at both ends of the range.
The 100–10,000 g reference spans materially different product volumes and operator demands. A dense 10 kg product may present a different discharge and pack-support problem from a bulky product at a much lower weight.
- Measure product bulk density and the volume occupied by each required target.
- Test the slowest-flowing and most fragile production batches, not a clean ideal sample only.
- Confirm the largest bag mouth, smallest bag mouth and support position.
- Record whether both channels remain stable as each hopper approaches low level.
- Include the actual sealing, stitching, closing or transfer step when assessing sustained output.
Route alternatives.
A single-head machine may be more appropriate for lower output or frequent low-volume changeovers. A multihead combination weigher may handle irregular pieces more effectively where high output and combination accuracy justify the system. Fully automatic bag handling can remove the operator-presented pack bottleneck.
Acceptance evidence
Report both individual-head behaviour and finished-pack results.
Begin by confirming that each weighing channel returns to a stable zero and is free from product contact, cable strain and mechanical interference. Use the agreed reference-weight procedure for each head. Then run consecutive production fills with the normal product, hopper-refill pattern and operator cycle.
Record which head or sequence produced each result where the control system makes that information available. Calculate the mean, sample standard deviation, minimum, maximum, range and any result outside the agreed band. Also record spill, retained product, incomplete discharge and manual intervention.
Output should be stated as accepted finished packs per minute over a sustained period. A short burst of discharges without pack replacement, refill and downstream handling is not a complete production measure.
Quotation and layout inputs.
- Representative product, target weights and measured bulk density.
- Required accepted output and shift pattern.
- Bag or pouch dimensions, mouth width and filled-pack weight.
- Operator position, bag support and discharge height.
- Method for loading both 25-litre reference hoppers.
- Cleaning frequency and cross-contamination controls.
- Downstream sealing, stitching, coding, checkweighing or transfer equipment.
- Available footprint, working access and service clearances.
- Agreed trial statistics and acceptance limits.
Confirm whether dual-head weighing improves your complete pack cycle.
Lancing can assess product behaviour, pack handling, operator duties and the required evidence before the final LU-DL5000D configuration is quoted.
Buyer questions
LU-DL5000D selection questions.
Does dual-head operation double the line speed?
Not automatically. The accepted output remains dependent on product feed, target weight, common discharge, operator pack presentation, hopper refill and downstream closing.
Is the 2–6 g figure a guaranteed tolerance?
No. It is a supplier reference dependent on the product and conditions. The agreed result must be demonstrated with representative product and a documented consecutive-fill method.
Can the machine fill sticky products?
The reference basis is free-flowing, non-sticky dry product. Sticky, cohesive or smeared material may need a different feed method and must be assessed from samples.
Why check both channels separately?
A combined result can hide a mechanical, zero or flow problem on one channel. Individual checks make diagnosis and maintenance more reliable.
What determines the usable upper weight?
Weight, volume, product flow, discharge clearance, bag support and operator handling all matter. A target within 10 kg is not automatically suitable.