An equipment demo can make a cartridge filler look production-ready. A buyer’s real question is narrower: can the machine repeatedly fill your oil into your 510 cartridge or AIO, at the target mass, without creating a cleanup or capping problem? A short acceptance trial answers that question more reliably than a catalog throughput figure. Larger buyers may use a formal factory acceptance test (FAT) before delivery and a separate site acceptance test (SAT) after installation; the plan below can also be scaled to a simpler supplier comparison.
This is a practical trial plan for brands and filling teams comparing semi-automatic equipment. It is not a universal pass/fail standard; set the limits with your own formulation, hardware supplier, quality team and applicable manufacturing requirements before testing.
Freeze the test combination first
Record the exact oil lot, intended fill mass, cartridge or AIO model, tank geometry, mouthpiece closure, needle, fixture and operator. Include both room and oil temperature. If the selling specification is in milliliters, establish the equivalent target mass from the oil’s density measured at the fill temperature rather than assuming every formulation weighs the same. A result from one cartridge should not be carried over to a different AIO merely because both fit under the nozzle.
For 510 hardware, check that the needle can reach the tank’s fill space without touching the center air path or damaging the wall. For AIOs, check the actual fill opening, device orientation and how the device is held during dosing. If either setup requires an improvised angle or unstable hand positioning, count that as a process issue, even if a few trial units look acceptable.
Measure setup and repeatability separately
Start with a small number of units to establish a workable needle position, dispense setting, oil-temperature window and post-fill dwell (the settling time before inspection or closure). Keep setup units separate from the measured run. Weigh empty and filled units using a calibrated scale with resolution appropriate to the agreed fill tolerance, and calculate net fill by subtraction. Where tare variation is meaningful, weigh each unit individually rather than relying on one average empty weight.
For the measured run, choose a sample size that can reveal drift over time, not just the first few good fills. For an initial supplier comparison, a few dozen units per configuration may reveal obvious setup or drift problems; this is an illustration, not a statistically valid acceptance sample. Your quality lead should set the final sample size and tolerance before the trial. Log each unit or a defined sampling interval; include startup, steady-state and the last portion of the run. Compare results with the pre-agreed fill-mass tolerance. Repeat the run on a second day or with a second operator before relying on one favorable session. Treat a supplier’s stated dosing accuracy as a claim to test on your own oil and hardware.
| Unit ID | Empty mass | Filled mass | Net fill | Timestamp | Operator / oil temp | Defect code / notes |
|---|---|---|---|---|---|---|
| Example | Record | Record | Filled minus empty | Record | Record | Record |
Also record cycle time. A headline units-per-hour figure may exclude loading, wiping, clearing bubbles, nozzle maintenance, capping and changeover. Report both the dispenser’s operating rate and the usable, finished-unit rate. That makes equipment comparisons more honest.
Follow the oil through the process
Watch for oil on the rim, center air path, exterior, fixture and machine nozzle. Note stringing, delayed drips, trapped air and changes in flow as the vessel level falls. A good average fill mass can conceal messy units or a long cleanup cycle.
Do not use heat simply to hit a faster fill rate. Oil viscosity, heating time, needle choice and dwell time work together; excessive or inconsistent heat may create a different problem downstream. If your process needs heating, test the cold start and the stable operating window separately. Our heated-versus-unheated filling guide covers how to define that window without assuming one temperature suits every formulation.
The handoff to capping and inspection
Filling is only one station. After the planned post-fill dwell, inspect the fill level, air path, rim and any visible seepage, then close the unit with the correct mouthpiece and method for that model. A 510 cartridge with a snap-on closure and one with a screw-on closure should not share an assumed capping step. The cartridge capping guide explains why closure design changes the workflow.
Sort defects and record their type rather than reporting a single yield number. Typical categories are underfill or overfill, rim contamination, air-path contamination, exterior oil, leaks after closure and closure damage. If the equipment only looks successful before capping, the trial is incomplete.
Include a realistic changeover
If production will switch oils, capacities or hardware, include at least one representative changeover. Record the time and steps needed to drain or clean the fluid path, change the needle or fixture, verify the next setup and segregate old and new lots. Weigh oil purged at startup and lost during cleaning. Changeover is where a filler can fail in practice through mix-ups, lost material and downtime.
Decide using a documented scorecard
When shortlisting suppliers, agree on what can be demonstrated with your hardware and a viscosity-matched, non-cannabis test fluid. Match viscosity at the intended working temperature. A surrogate may reveal fixture-fit and handling problems, but its density can differ from your production oil, so do not reuse its fill-mass results as acceptance tolerances for your oil. Validate dosing performance on your actual formulation in your own authorized facility. Before shipping regulated production oil to a vendor, check the applicable legal and logistics requirements.
Put decision criteria in writing: fill-mass distribution, visible defects, finished-unit rate, startup waste, changeover time, cleaning access, operator steps and support for the specific needle and fixture. Keep raw measurements and photos so a second supplier can be compared on the same basis.
ILEVA’s cartridge filling machine page describes a semi-automatic system for 510 cartridges and selected AIO formats. If you are comparing options, bring your hardware samples, oil properties and production target to the conversation. For hardware, see the bulk 510 cartridge range and empty AIO devices. Confirm machine fit on the exact model you plan to fill.
FAQ
Can one filler be qualified for both 510 cartridges and AIOs?
Possibly, but qualification must be repeated for each oil-and-hardware combination. Needle access, fixture stability, usable fill space and downstream closure may differ.
What if a supplier cannot test my actual oil?
Use a representative non-cannabis surrogate to screen fixture fit and workflow where appropriate. Match viscosity at the intended working temperature; do not transfer surrogate fill-mass tolerances to your oil. Validate mass accuracy, defects and finished-unit rate on your actual formulation in an authorized facility before accepting production performance.
What sample size should an acceptance trial use?
There is no universal number. A few dozen units per configuration can be an initial screening example, but cannot prove production capability. A quality engineer should set the final sample plan and acceptance limits for the intended process.
