Commercial Dicing Processors (Performance Test)
A sound dicing processor test measures usable-dice yield, throughput, cut consistency, and cleanability under repeatable conditions. Test the same product lot, preparation, and grid across three 5.0 kg runs. Record every output category and operating condition; there is no universal pass score, speed limit, or processor temperature that applies to every model.
A machine can look fast while producing too many fines, irregular pieces, or product left inside the assembly. A useful performance test therefore measures more than the time needed to process a batch. It also checks whether the machine makes the cut your operation needs and whether staff can clean and reassemble it as the manufacturer directs.
I start by separating machine performance from test conditions. Soft produce, varied piece sizes, or a different grid can change results. The method below helps you compare models or check a machine over time without mistaking a product problem for a machine problem.
Machine, Grid, and Product Preparation
Preparation makes a processor test fair and repeatable. Confirm the exact model and approved parts, then record the grid, product condition, and operating limits. These details matter because results apply only to the tested setup, not automatically to every product, grid, or model in a product line.
Verify the machine and test setup
Find the model’s current manufacturer documentation and check whether the exact model is listed for the applicable NSF/ANSI 8 requirements. Confirm which parts are approved for food contact. A certification or listing does not establish dicing speed or usable yield.
Before testing, record:
- Model and serial number, if available
- Grid designation and blade condition
- Nameplate voltage, phase, frequency, and rated power
- Manufacturer-stated duty cycle and maximum continuous run time, if specified
- Required guards, interlocks, and assembly steps
Do not assume every processor offers 6.4 mm, 9.5 mm, or 12.7 mm grids. Test those nominal sizes only when they are available for the model, and record the grid designation shown by the manufacturer. There is no universal blade-speed or operating-temperature limit for these machines.
Standardize the product
Use one product lot for each comparison. Record the product type and variety, starting temperature, batch mass, and preparation dimensions. Remove inedible material, and cut pieces to fit the manufacturer’s permitted feed opening. Keep chilled food at or below 5°C (41°F) when required by your food-safety plan.
Use a calibrated thermometer to check and document temperature. The FDA Food Code’s 5°C (41°F) cold-holding limit and 57°C (135°F) hot-holding limit are food-holding controls, not processor operating-temperature ratings.
Product condition can distort a comparison. Warm, soft, overripe, or inconsistently sized produce may smear, crush, or clog. Record those conditions, and repeat an unusual run with a standardized lot. Never use extra, unapproved force on the pusher to compensate.
Controlled Dicing Performance Test
A controlled test uses the same batch size, product preparation, grid, and timing rules for every run. For each product and grid combination, process three separate 5.0 kg batches. Report all three results, since one unusually good run does not show how consistently the machine performs.
Run the batches safely
Inspect the grid and blades for damage, confirm correct assembly, and check that guards and interlocks are in place. Start with equipment in the manufacturer-approved cleaning and sanitizing state. Follow the operating instructions, including any stated run-time limits.
For each run:
- Weigh 5.0 kg of prepared product and record its starting temperature.
- Start the timer at a consistent point, such as when feeding begins. Use that same point for all runs.
- Feed product as instructed. Do not force the pusher or exceed the permitted feed opening.
- Stop timing when the batch has been processed, using the same end point each time.
- Weigh acceptable dice, fines, rejects, and retained material separately.
Use a scale suitable for the expected amounts, and note its resolution. Define “acceptable dice” before testing. For example, set the acceptable size and shape range based on the operation’s recipe or production specification. There is no single tolerance that fits every menu or processor.
Calculate performance measures
Throughput describes the mass processed per unit of time. Calculate it as batch input mass in kilograms divided by elapsed time in minutes. If loading pauses or stoppages occur, record them; report both the chosen timing method and any downtime so readers can interpret the result.
Acceptable-dice yield shows how much of the input became product that met your preset specification. Calculate it as acceptable-dice mass divided by prepared input mass, multiplied by 100. Also report fines, rejects, and retained material as percentages of input.
| Measure | Calculation or record | What it helps show |
|---|---|---|
| Throughput | Input kg ÷ elapsed minutes | Processing rate under the stated test conditions |
| Acceptable-dice yield | Acceptable dice kg ÷ input kg × 100 | Share meeting the agreed cut specification |
| Fines | Fines kg ÷ input kg × 100 | Amount cut smaller than the preset range |
| Rejects | Reject kg ÷ input kg × 100 | Oversize or irregular material |
| Retained material | Material left in assembly kg ÷ input kg × 100 | Product not collected as usable output |
Check the mass balance: the weighed output categories should account for the input as closely as your scale and collection method allow. Investigate large gaps rather than silently assigning missing mass to a category. Present results for each replicate, plus an average if useful. The average should not replace the individual results.
Disassembly, Cleaning, and Inspection
Cleanability is part of a practical performance assessment, but it must be checked under the manufacturer’s procedure. Record what can be disassembled, visible residue after cleaning, and any damage or reassembly issue. Do not use an improvised cleaning method to make one machine appear easier to maintain.
Stop, isolate, clean, and inspect
Stop the processor and isolate power before clearing a jam, removing parts, or disassembling it. Never reach into the feed throat or remove guards while the machine is energized. Follow the manufacturer’s cleaning and sanitizing instructions, including approved chemicals and tools. Avoid abrasive tools or unapproved chemicals on food-contact surfaces.
After cleaning, inspect the blade and grid for residue or damage. Record the time and steps required using the approved procedure, but avoid treating time alone as proof of sanitation. Document whether parts were reassembled correctly and whether the required checks were completed before the next run.
A practical cleanability record can include:
- Parts removed and cleaned, according to the manual
- Visible residue after the documented procedure
- Any damaged, worn, or difficult-to-inspect area
- Reassembly and guard or interlock checks
- Cleaning time, with the method and staff count noted
Yield Reporting and Service Presentation
A useful report lets another person understand exactly how the test was run. Include the model, grid, product, preparation, temperature, timing rules, three replicate results, and cleaning observations. Without these details, a throughput or yield number can be misleading.
Compare like with like
Do not compare two machines using different product lots, temperatures, preparation sizes, grids, or undocumented operator force. If a variable changes, record it and treat the result as a separate test. Where a run produces an unexpected result, inspect the product and setup before blaming the machine.
| Test scenario | Keep constant | Report separately |
|---|---|---|
| Compare two processor models | Product lot, prepared size, batch mass, grid designation, timing method | Model, nameplate details, all three run results |
| Compare grids on one model | Product lot, temperature, feed preparation, batch mass | Each grid’s designation and results |
| Recheck a processor over time | Product and method, where practical | Blade/grid condition, date, operator, and any changed conditions |
| Investigate an irregular run | Repeat with standardized product and setup | Original anomaly and repeat results |
Worked comparison scenarios
The following are examples of how to structure a report, not claims about specific machines. In a model comparison, I would test each available grid using the same prepared lot and three 5.0 kg batches. If one model has a different feed opening or cannot use the same grid size, I would state that limitation rather than present the results as a direct, equal-condition comparison.
For a service check, I would compare current results with earlier runs only if the product and method were sufficiently similar. A rise in fines might prompt an inspection of product condition, grid damage, assembly, and operating steps. It is not, by itself, proof of a particular fault.
Make results useful to operators
Present the raw replicate values alongside any summary. Include the acceptable-dice definition and the mass of every output category. Note interruptions, jams, unusual product condition, or any departure from the manual. These notes help a manager decide whether a result reflects the machine, the product, or the test method.
The strongest conclusion is specific: for example, “This model and grid produced these results on this product under these conditions.” Avoid broad claims such as “the fastest processor” unless the tested products, grids, and methods support that exact comparison.
Frequently Asked Questions
These answers clarify how to set up and interpret a dicing processor test. Use the machine’s instructions and your facility’s food-safety plan for operating and cleaning requirements. Results describe the tested conditions; they are not universal performance ratings.
How many batches should I test?
Run three 5.0 kg batches for each product and grid combination. Report each result, not only the best run.
Which grid sizes should I test?
Test the manufacturer’s available grids. Nominal sizes of 6.4 mm, 9.5 mm, and 12.7 mm are options only when supplied for that model.
What counts as acceptable dice?
Set a size and shape specification before testing, based on the intended use. There is no universal acceptable-dice tolerance.
How do I calculate throughput?
Divide the input mass in kilograms by elapsed processing time in minutes. State when timing begins and ends, and note stoppages.
How do I calculate usable yield?
Divide the mass of dice meeting your preset specification by prepared input mass, then multiply by 100. Report fines, rejects, and retained material separately.
Does NSF/ANSI 8 certification prove a processor is fast?
No. Verify the exact model’s applicable listing and approved food-contact parts, but assess throughput and yield through a controlled test.
What temperature should the processor run at?
There is no universal operating-temperature rating for commercial dicing processors. Record product temperature and follow the manufacturer’s operating limits.
What should I do if a batch smears or clogs?
Stop safely and review product softness, temperature, preparation size, and setup. Repeat with standardized product if needed; do not force the pusher.
Can I clear a jam while the machine is on?
No. Stop and isolate power before clearing a jam or disassembling the processor. Never reach into the feed throat or remove guards while energized.
How should I compare two processors?
Use the same product lot, preparation, batch mass, grid designation, and timing method where possible. Report any unavoidable difference and all three replicate results.
(This article was written by one of our staff writers, Daniel M. Whitaker. Visit our Meet the Team page.)
