Seed to cup · Stage 02 · Roast
ARTISAN ROAST LOG IMPORT & AI ANALYSIS
Import a roast. Get told what happened.
Roast live on the free, open-source Droptime Logger — or keep Artisan at the machine, it’s great there. Either way, Droptime picks up at the drop: your .alog files become structured, charted, compared batches, each with a readout written the way a good head roaster would say it.
< 2 min
Import to first AI readout
.alog
Native Artisan import
10 batches
Compared on every readout
0
Numbers ever invented
HOW IT WORKS
From live capture to plain-language readout
Live capture, via the free Logger
The Droptime Logger is a free, open-source desktop app for Mac and Windows that logs your roasts live from TC4-compatible machines. Local-first — every sample is written to disk before it reaches the screen — with a setup wizard that finds your roaster in about three minutes. Export .alog and drag it into Droptime; Cloud sync is in build to make that automatic.
- Free forever and AGPL open source — not a trial
- Ghost a previous roast on the live chart, with spoken cues
- Auto CHARGE/DROP detection on by default
The handoff, today
Roast on the Logger → export .alog → drop it into Droptime. Same file format Artisan uses — nothing proprietary in between.
Artisan import that just works
Drop one .alog or a whole folder. Droptime parses the full profile — BT/ET series, CHARGE, dry-end, first-crack, DROP markers, weights, notes — and maps everything to a canonical roast record. CSV from other loggers works too, with a column-mapping wizard that remembers your presets.
- Batch import: a folder of 20 .alog files becomes 20 charted roasts in under a minute
- Duplicate files deduped by hash — re-import safely
- °C/°F mismatches detected and normalized on import, with a confirm
Import summary
20 roasts imported · 19 charted clean · 1 flagged “missing first-crack marker — place it to finish.”
A curve chart built for roasters
Dual-axis temperature and rate-of-rise, ghost overlays of your profile target and past batches, phase-shaded drying/Maillard/development, labeled event markers, and a crosshair that reads out time, BT, RoR, and DTR-so-far as you scrub.
- Overlay up to 5 batches of the same coffee to see consistency at a glance
- A consistency band shows the envelope of your last N roasts
- RoR derived from BT when your source doesn’t supply it
On the chart
Ghost curve: profile target · Ghost curve: last Tuesday’s batch · FC marker at 9:42 · DTR 21.3%
The readout — and the follow-up questions
On save, Droptime writes a plain-language account of the batch: how it tracked against your profile and your last ten roasts of the same coffee, what looked off, and one or two concrete next-time adjustments. Then ask follow-ups in plain English — answers are computed from your actual curve arrays and markers, never made up.
- “Your RoR crashed to near-zero at 8:10 — a stall right after dry-end.”
- “Try a 5–8% gas cut 30s before dry-end instead of at dry-end to hold momentum.”
- Ask: “is this batch flicking?” or “how does today’s DTR compare to my best-tasting Ethiopia?”
Readout excerpt
“FC landed 40s later than your ten-batch average — consistent with the softer gas ramp after the turning point. Cup it against batch #112 before adjusting.”
MORE IN THIS MODULE
The rest of the logging toolkit
Generic CSV import
Time, BT, ET, RoR, gas, airflow, drum — map columns once and the preset is remembered per source.
Manual & timer logging
Roasting by hand? Start the timer and tap CHARGE / TP / DRY / FC / DROP as they happen. Same record, same readout.
Tags & library filters
Tag roasts production, sample, dialing-in, reject. Filter by coffee, machine, roast level, DTR, or weight loss.
Raw files kept, always
Your original .alog and CSV files are stored untouched and included in every export. They’re yours.
Full telemetry
Charge temp, turning point, RoR series, first-crack window, DTR, drop stats, weight-loss % — all first-class fields.
Needs-review, not guesswork
Malformed files, probe dropouts, and missing markers get flagged for you to resolve — never silently patched.
FAQ
Fair questions
No — and it’s not trying to. Artisan is excellent at live roast logging, and most of our users keep using it at the machine. Droptime is everything after the drop: cloud history, comparison, the AI readout, inventory, blends, planning, and QC. Import is native, so the two work together without friction.
That’s the Droptime Logger — a free, open-source desktop app for Mac and Windows that logs roasts live from TC4-compatible machines, local-first. Export .alog from the Logger and drag it into Droptime today; Droptime Cloud sync is in build to make that handoff automatic.
When your source supplies RoR we use it. When it doesn’t, we derive it from the bean-temperature series with the same smoothing approach Artisan uses, and we validate against Artisan’s computed values on import. Flat-lined probe segments are detected and excluded rather than skewing the curve.
The roast imports with a needs-review flag and Droptime asks you to place the marker on the chart. The readout won’t invent a first-crack time that isn’t in the record — that’s a hard rule across the product.
All of it. The Free plan (free forever) includes roast logging, curve analysis, Artisan import for one machine, 30 roasts a month, and 20 AI analyses. Paid plans add unlimited throughput, blends, planning, cupping, and chat.
Your roast history has things to tell you.
Import the .alog files sitting in your Artisan folder and get your first readout in about two minutes. No card, no call.