Winter recipes still sit in the scale on most dairies right now. The bunker face is about to change, and if those old targets stay untouched, the first wet cut of the year will expose every stale number. The work is straightforward if you start while it is still late winter: sort which slots spring forage will actually need, rebuild order and weights offline, then lock barn labels so a relief driver cannot pull January’s dry hay batch by habit.
This is scale work, not brochure work. Twenty programmable recipe slots sound like plenty until half of them still describe feeds you stopped loading in June.
Audit which of the twenty slots still match real feeds
Commercial mixer scales commonly hold twenty recipes, twenty products, and twenty barn or batch labels. That capacity is useful. It is also how a list goes stale. On a Free State dairy in late winter you will often find drought stretch recipes, a premix trial that never stuck, and a dry-cow slot written for last year’s group sizes still taking up numbers.
Walk the full list against the feeds you will load after the season turns. Pasture returns in KwaZulu-Natal and the higher-rainfall districts. New maize silage changes bulk density the day the fresh pit opens. Hay and straw drop out of the milking groups or move to a different pen. If a slot names an ingredient you will not touch for three months, clear it or rewrite it now.
Dead recipes left in the scroll are how someone selects the wrong batch at 05:30 with the tractor already running. Print the current list, mark keep, rewrite, or delete beside each number, and do the deletions in daylight when nobody is waiting on the mixer.
- Keep only recipes tied to feeds you can point at in the shed or bunker
- Rewrite any slot whose target weights still reflect winter dry-matter assumptions
- Delete trial mixes and one-off sick-pen batches that never became routine
- Note which product numbers feed into more than one recipe so you do not break a second mix when you edit the first
Operators who skip this step end up editing live every morning for a fortnight. That is slower, and it trains the crew that the scale numbers are suggestions.
Rebuild ingredient order and target weights offline
Spring forage is rarely a straight swap for winter roughage. Moisture climbs. Particle length changes. A slot that once started with dry hay and finished with a small silage drop may need the reverse order once the new cut is wetter and heavier per grab.
Do the rebuild at the desk, not on the loader. Enter the new ingredient sequence, set the revised target weights in kilograms, and run a dry check of the prompts before anyone loads a bucket. If your crew already follows a fixed load order for mix quality, keep that discipline and only change what the season forces. A practical walk-through of load order, scale zeroing, and discharge technique is worth revisiting if relief staff will be on the machine when the new recipes go live.
Watch bulk density hard. Spring material can pack differently in the tub. A recipe that filled the mixer comfortably on winter hay may sit low or ride high once pasture and fresh silage dominate. If you are already near the edge of the machine’s working window, revisit how load window and density drive capacity before you lock targets that leave no headroom.
On LEO Agriculture VT and HD series mixers the programmable scale is standard, with twenty recipe slots, twenty products, and twenty barn counts. Accuracy is rated at less than ±0.01% of full scale, with a six-level vibration filter and a five-level digital motion filter, so the display can be trusted if the recipe behind it is honest. Heavy-duty load cells rated to 10,000 kg (22,046 lb) give you margin when wet spring loads hit harder than the dry winter batches you weighed all season. None of that helps if the stored targets still describe July forage.
Write target weights the way the loader actually works. Round to numbers a driver can hit without feathering the bucket for thirty seconds. If the nutritionist’s sheet shows 187 kg and your bucket lands cleanly on 190 kg, settle the argument before 5 a.m., not during it.
- Zero and check the scale on level ground before you trust any test batch
- Enter products first, then build each recipe from those product numbers
- Set ingredient order to match how the auger processes the new spring mix
- Save, power-cycle if your indicator needs it, and confirm the slot still reads back correctly
- Run one supervised mix and compare bunk sample to what you intended
Ration type shifts also change how the machine processes long fibre. If you move from short pre-chopped winter roughage into longer spring pasture or wetter baleage, knife and kicker setup may need a look at the same time you rewrite the slots. Matching bolt-on kicker size to the ration you are actually cutting stops you chasing mix time when the real problem is processing, not the recipe weights.
Label the slots spring forage drivers must select
Recipe numbers alone fail under pressure. A relief driver who covered morning mix twice in winter will reach for the familiar slot unless the label on the indicator makes the spring choice obvious.
Use the barn or batch labels for what they are for. Name the group and the season in plain language the crew already speaks. “Milk East Spring” beats “R12”. “Far-off Dry” beats a number that meant something to the person who programmed it in March last year. With twenty barn labels available on a typical commercial indicator, you have room to separate spring milking, winter carry-over groups, and hospital pens without stacking meanings onto one code.
Put the same names on the whiteboard in the feed shed. The scale and the wall should agree. When someone calls in sick, the stand-in should not need a phone call to know which slot feeds the fresh group after the season turn.
A few farms still run one master recipe and adjust by eye when pasture quality swings day to day. That habit costs uniformity. Better to hold two or three spring variants with clear labels and pick the right one than to rewrite a single slot every wet morning while the cows wait.
What breaks if you wait until the first green cut
The failure mode is boring and expensive. Winter hay targets stay in the slot. Spring silage lands heavier per grab. The operator short-loads by eye to avoid overfilling, the concentrate ratio drifts, and the bunk looks sorted by mid-morning. Or the opposite: the tub takes the full winter weight of wetter forage, mix time stretches, and fuel use climbs while the discharge still looks under-processed.
Either way the scale did its job. The recipe behind it did not.
Do the audit this week while orders and staff planning for spring are already on the table. Clear the dead slots. Rebuild order and weights where the bunker will change. Label barns so the right spring ration is the path of least resistance. When the first cut lands, the mixer should only need loading, not rewriting.
