Run the Pattern Test
End-of-line palletizing is a strong automation candidate: repetitive, physically demanding, and easy to measure. It stalls when the pattern the robot must build has never been formally specified.
The Bot Scout pattern test is direct: can someone hand you the stack pattern for every SKU, including layer arrangement, orientation, tie sheets, and pallet type. If that document does not exist, the project is a pattern-definition exercise with a robot attached, and it should be scheduled as one.
Mixed-SKU palletizing is a genuinely harder problem than single-SKU, and the two are often quoted as if they were the same job. Builders such as Universal Robots, ABB Robotics, and FANUC publish palletizing configurations across both, at very different cost levels.
| Variable | Why it matters | What to measure | Where projects stall |
|---|---|---|---|
| Case dimensions | Drives gripper and pattern | Range across all SKUs | One outlier case nobody mentioned |
| Case weight | Payload at full extension | Heaviest case, not average | Payload rated at the wrist only |
| Stack height | Reach at the top layer | Height including pallet and tie sheets | Arm cannot reach the final layer |
| Pattern | Robot must build it exactly | Written pattern per SKU | No documented pattern exists |
| Rate | Cases per minute at peak | Peak, not average | Cell sized for the average rate |
| Pallet handling | Empty pallet supply and full removal | Who moves pallets and how often | Robot idle waiting for a forklift |
Gripper Choice Follows the Case
Vacuum, clamp, fork, and bag grippers each suit different packaging. A vacuum gripper struggles with porous or shrink-wrapped surfaces; a clamp needs clearance between cases; a bag gripper is a different tool entirely.
Specify the gripper against the full SKU range including the awkward outlier, not the representative case. That single omission causes more palletizing rework than any other, and it mirrors the part-presentation pattern in the manufacturing robots guide.
Confirm reach and payload together at the top layer. Rated payload is measured at the wrist and reach is quoted to the wrist, so the heaviest case on the highest layer at full extension is the case that actually sizes the arm.
- Obtain a written stack pattern for every SKU before quoting.
- Size payload on the heaviest case at full extension and height.
- Specify the gripper against the awkward SKU, not the typical one.
- Design pallet supply and removal, including who moves them.
- Size the cell for peak rate rather than average throughput.
Safety, Space, and Restart
A palletizing cell moves heavy loads at height, which drives the guarding design. ISO 10218-1:2025 sets the robot safety requirements, and OSHA notes that many incidents occur during setup and maintenance, which in palletizing means clearing a fallen case.
Define the restart procedure for a dropped or misaligned case. This is the most frequent stoppage in a palletizing cell and the one most often left undefined at commissioning.
For the wider distribution context, including traffic and peak testing, see the warehouse automation guide.
Bottom Line
Palletizing is a strong automation candidate when the stack pattern exists on paper and the gripper suits every SKU. Size the arm on the heaviest case at full height, and define the dropped-case restart.
Get the written stack pattern for every SKU before requesting a palletizing quote.
FAQs
What makes a palletizing project straightforward?
A documented stack pattern per SKU, a consistent case range, a defined rate, and a plan for pallet supply and removal. Missing patterns are the usual cause of delay.
Is mixed-SKU palletizing harder than single-SKU?
Considerably. Mixed loads need pattern logic, a gripper that handles the full case range, and more exception handling, and the two are often quoted as though they were the same job.
How do I size a palletizing robot?
Use the heaviest case at full extension and at the top layer height, including pallet and tie sheets. Rated payload and reach are both quoted at the wrist.
What stops a palletizing cell most often?
A dropped or misaligned case. Define who clears it and how the cell restarts before commissioning, since this is the most frequent stoppage in practice.