If you have generated a fabdose report and never noticed the chat panel sitting next to your findings, this is what using it actually looks like. Below is a real screenshot from our own store listing: a critical finding on a CNC-machined part, and the two questions someone typed into the panel next to it. Nothing here is a mockup of what the feature could do. It is what it did, on this report, on this finding.
A note on the part itself. This report was generated specifically to capture the screen for our store listing, so treat it as a demonstration run rather than a named customer's job. The finding, the material data, and the panel's replies below are all real output from the live product, reproduced as they appeared on screen.
What did the report actually flag?
A critical corner-radius warning on a CNC-machined alumina part, with no located position on the model. The finding card reads, in full:
Corner Radius Warning: Internal corner radii in this alumina part are not compatible with the cylindrical geometry of standard CNC milling tools. CNC milling tools are cylindrical and physically cannot cut a true sharp internal corner. If internal corners are left sharp or undersized relative to available tooling, the machinist must resort to costly secondary operations such as EDM (Electrical Discharge Machining) to achieve the required geometry. At an annual volume of 10,000 parts, this adds significant per-unit cost and lead time. Alumina is also a brittle ceramic, making it especially sensitive to stress concentrations at sharp internal corners, which can initiate cracking during machining or in service.
Two things about that card are worth being upfront about, because they set up exactly what the chat panel is and is not doing.
First, this is a process-level warning, not a face-by-face one. The card is marked "Location not found" rather than pointing at a coordinate on the part. Fabdose's per-face, pinned findings are strongest on injection-molded geometry, where undercuts and draft angles get measured face by face and located on the model. This particular CNC check is closer to a rule-based flag: it read the part's process and material, matched them against a known constraint, and surfaced the warning without a specific coordinate.
Second, the card names EDM as the example of a "costly secondary operation." Keep that in mind. It becomes relevant two questions from now.
What happens when you click the finding and ask why?
You get a specific mechanical explanation, not a restatement of the warning. With the corner-radius finding selected, the question typed into the panel was short: "why is this happening?" The panel's answer, reproduced here as it appeared on screen:
Why This Is Happening: Internal Corner Radius Incompatibility (CNC Machining × Alumina)
The Fundamental Physical Cause
CNC milling tools are cylindrical. When a rotating cylindrical tool cuts along an internal corner, the tool's circular cross-section physically prevents it from producing a true 90° sharp internal corner. The smallest internal radius the tool can produce is equal to the tool's own radius.
The tool cannot remove the remaining triangular wedge of material in the corner without a secondary operation.
Between those two paragraphs, the panel drew a small diagram: a sharp corner as requested, next to what the tool actually leaves, with the relationship written out as radius = tool_radius.
That is a specific, checkable mechanical claim, and it matches how CNC tooling references describe the limit. A rotating end mill is a cylinder, so the tightest internal radius it can leave at a corner is its own radius, commonly written as R ≥ D/2 for a tool of diameter D. Shops that want to protect the tool from chatter and deflection (vibrating or bending under load) near a tight corner often ask for more margin than that bare minimum, closer to 1.1 to 1.3 times the tool's radius, which is why a designer who specs a corner radius equal to a common tool size can still get pushback on the quote. None of that extra margin appears in the panel's answer above. What it gave was the physical floor, which is the part of the explanation the finding card itself never spelled out.
Ask a follow-up, and the context you already gave it carries forward
The same report, asked a second question with the same finding still selected: "isn't there another way?" (the Korean-language version of this report was the one where that follow-up was captured). The panel's answer opened by naming the material directly:
Alumina (Al₂O₃) is a ceramic material and is non-conductive. Standard EDM cannot be applied to it. The process described as a "costly secondary operation" is actually specialized grinding or ultrasonic machining (USM).
That is the part worth sitting with. The original finding card, quoted above, named EDM as its example of the secondary operation this part would need. EDM erodes material with electrical sparks, and that requires a workpiece that conducts electricity. Alumina is a ceramic oxide and an electrical insulator, so EDM is not on the list of options for this material at any budget, and the panel said so once the question put it in the context of the specific material already sitting in the report's material panel.
Precision grinding is the standard way tight ceramic geometry gets finished in production, and it holds tolerances tighter than most milling operations: on the order of ±0.05mm in normal production, and closer to ±0.025mm in precision or toolroom-grade work. Ultrasonic machining reaches into hard, brittle, non-conductive materials that both cutting tools and EDM struggle with, using an abrasive slurry and a tool vibrating at ultrasonic frequency rather than a spark or a cutting edge, and it can hold similarly tight tolerances on a shaped cavity. Both are established processes for alumina specifically, and neither one showed up in the finding card's own wording.
The panel went on to describe a design alternative too: instead of paying for grinding or ultrasonic work on every part, add a small relief cut at the corner, sized to clear the milling tool, so the corner no longer needs to be sharp to do its job. Relief cuts at internal corners are a standard DFM move for exactly this reason, and different references size them slightly differently depending on how much stress concentration and material removal they are willing to trade off. If a relief cut is on the table for your part, that trade-off is worth a conversation with whoever is quoting it, not a number taken from either a card or a chat panel.
What the panel had that a blank chat window would not
The reason the second answer named the material by name is not that the panel is smarter than a general-purpose AI at ceramics. It is that the material, the process, and the specific finding you clicked were already sitting in the report when you typed the question. A general chatbot cannot see your findings; you would have had to type out the material, the process, and what the warning said before it could tell you anything specific about this part at all, the same gap that shows up when you try to hand a general chatbot your STEP file directly instead of a finding it already produced. Here, that context was already attached, which is the actual difference: what the panel is attached to, not how it thinks.
Where this lives, if you want to try it on your own report
The panel sits next to the findings list on every fabdose report, not behind a separate mode. Click a flagged issue, a chip for it appears above the message box, and whatever you type next is already scoped to that finding, the way "why is this happening" and "isn't there another way" were scoped to the corner-radius warning above.
It will not always give you the fix. In the report above, the finding card itself named a secondary process that does not apply to this material, and the panel named the two that do once someone asked. Read its answers the way you would read a fast first take from someone who has the file open in front of them: useful for deciding what to ask your shop next, not a replacement for asking them.
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FAQ
Does every fabdose report include a chat panel?
Yes. It sits next to the findings list on every report. Click any flagged issue and a chip for it appears above the message box, so the question you type is scoped to that finding.
What does the panel actually have access to when you click a finding?
The finding you selected, the material and process attached to the report, and other structured data already in the report. It does not have your raw CAD geometry. Your STEP or STP file is processed on your own computer; the defect findings and the panel's answers about them are processed by AI.
Can the panel's answer be wrong?
Yes. In the example above, the finding card itself named a secondary process that does not apply to the part's material, and the panel named the two that do once asked. Treat its answers as a fast first read, not a substitute for your shop or process engineer on anything that changes tooling or a quote.
Why can't a standard CNC end mill cut a sharp internal corner?
Because the tool is a rotating cylinder. The smallest internal radius it can leave at a corner is set by its own radius, commonly written as R ≥ D/2. A true 90-degree internal corner would need the tool to occupy a point smaller than itself, which a cylindrical tool cannot do.
Is EDM always the fix for an internal corner sharper than a tool can cut?
No. EDM erodes material electrically, which requires a conductive workpiece. Alumina and most technical ceramics are electrical insulators, so EDM does not apply to them regardless of budget. Precision grinding and ultrasonic machining are the processes that actually reach a tight corner on a non-conductive, brittle material like alumina.
Fabdose reads your STEP and STP file on your own computer and reports defect findings against process-specific design rules, as covered in the FAQ above.
The chat panel next to those findings answers questions about a selected finding in plain language, using the material, process, and finding data already in the report. It does not simulate the manufacturing process, and its answers are not guaranteed correct, as the finding card's own EDM example above shows directly. The report used in this post was generated to capture the screen for our store listing.