An RFQ for a structured-light scanner placed at a high-temperature assembly station must declare the working-temperature window, projector wavelength, target accuracy, working distance, scanner form factor, and software deliverable format as six separate line items; omitting any of these six fields is the single most common reason suppliers return a requote with a 30% to 60% price spread [S3][S5].
Industrial structured-light scanners from current-generation suppliers (including the INSVISION AlphaScan and SHINING 3D Trak Nova) ship rated for ambient operation between -10°C and 40°C, with metrology-grade accuracy of 0.020 mm to 0.050 mm at controlled conditions and blue-laser or white-light projection as the dominant industrial pattern strategies [S2][S3][S4].
Six line items the RFQ must carry, in this order
The first line item is the ambient working-temperature window, expressed as a min/max pair with units and the exposure duration (continuous vs intermittent); a station within 1 m of a furnace, induction heater, or curing oven will commonly see 45°C to 65°C ambient, and any value above 40°C should be flagged on the RFQ so the supplier can derate or quote an enclosure [S2]. The second line item is the projector wavelength: white light (~400 to 700 nm), blue LED (~450 nm), or blue laser (~405 to 488 nm). Blue laser projection is the dominant choice for industrial cells because it stays stable under the ambient lighting that defeats red-laser and white-light systems [S1][S2][S5]. The third line item is target accuracy at metrology grade, typically 0.020 mm to 0.050 mm point precision and 0.05 mm to 0.2 mm volumetric accuracy on small-to-medium parts; RFQs that list "high accuracy" without a number trigger the widest requote spread [S3][S4][S5].
The fourth line item is working distance and field of view, given in mm and mm × mm; the INSVISION AlphaVista family extends a single acquisition to 2200 mm × 2200 mm, which removes repositioning moves on large welded fabrications [S2]. The fifth line item is scanner form factor: handheld, desktop/turntable, robot-mounted, or fixed-in-line metrology station. Robot-mounted structured-light systems are the standard pick for the highest-resolution, highest-accuracy captures in lab and high-mix cells because the projector-camera geometry stays fixed throughout the scan [S3][S4]. The sixth line item is the software deliverable format: STL, STEP, IGES, Parasolid, Geomagic Design X native, or a named CAD package such as SolidWorks, Fusion 360, or NX; picking two or more formats is normal, and procurement teams should expect transparent per-format multipliers rather than a single blended price [S3].
High-temperature cell: where the RFQ has to deviate from a stock spec
For an assembly station whose local ambient sits above 40°C, the standard -10°C to 40°C industrial scanner rating is no longer valid and the buyer must add a thermal line: declare the maximum ambient temperature, the dwell time at that temperature, and whether the scanner is mounted on the tooling or on a stand-off arm; suppliers typically respond with one of three solutions, an active cooled enclosure, a stand-off mount that increases working distance so the scanner body sits in cooler air, or a derated accuracy figure with a thermal compensation curve baked into the software [S2][S3]. Structured-light scanning is non-contact and captures 100% of surface data without touching the part, so the scanner itself does not have to be at the part temperature, but its optics and projector electronics must remain within their published operating range, and a 1.5 m to 2 m stand-off is a common compromise when the part is hot [S4].
For a high-temperature assembly RFQ, the accuracy line should be paired with an ISO 10360-8 compliance call-out when the scanner is used as a metrology reference; the SHINING 3D Trak Nova is one of the current target-free structured-light systems that ship with ISO 10360-8 traceability, and a metrology lab should be ISO/IEC 17025 accredited so the deliverable can carry a calibration certificate [S3]. The throughput line is also worth carrying: the AlphaScan reference system processes roughly 7,100,000 measurements per second, which lets a full body-in-white assembly capture in about 10 minutes; buyers writing RFQs for takt-time-bound cells should quote the per-piece scan budget in seconds and let the supplier match a configuration, rather than naming a specific scanner model [S2].
Selection criteria compared: handheld vs desktop vs robot-mounted vs in-line
The four scanner form factors line up against four decision criteria: achievable accuracy, throughput per part, tolerance to ambient heat, and unit cost band. Handheld units such as the Artec Eva weigh about 374 g, cost around GBP 4,500 to purchase, capture 16.1 million points per second at 0.1 mm vertical resolution, and trade accuracy for flexibility; they are the right pick for medium-sized parts and on-site scans where the workpiece cannot move [S5]. Desktop and fixed-mount scanners, often paired with a rotating turntable, deliver higher and more consistent accuracy than handheld units because the projector-camera geometry stays fixed throughout capture, which makes them the standard pick for repeatable inspection of small parts [S4]. Robot-mounted systems, including those in ISO/IEC 17025 labs, are the standard for the highest-resolution and highest-accuracy captures and run repeating pickup-scan-unload cycles; they pair naturally with industrial metrology stations and accept a wider range of part sizes than a desktop turntable [S3][S4]. Fixed in-line metrology systems are the most expensive and least flexible option but give the tightest accuracy tolerances the technology offers, which is why they tend to live on high-volume production lines rather than high-mix assembly cells [S4].
On tolerance to ambient heat specifically, no current-generation industrial handheld or desktop structured-light scanner is rated above 40°C, so the high-temperature-assembly case effectively forces a robot-mounted or stand-off-mounted configuration with the scanner body kept out of the hot zone [S2]. A useful mental rule for the RFQ: if the part is hotter than 60°C or the ambient is hotter than 40°C, write a thermal-isolation line on the RFQ and let the supplier propose the mount; if the part is at room temperature and the cell is well-ventilated, a handheld is acceptable. Comparable industrial camera selection logic, which often runs alongside a structured-light scanner in the same inspection cell, is covered in a separate industrial camera spec map for surface finish; pairing the two documents when building the inspection-station RFQ keeps the camera and scanner specs in lockstep.
Workflow and deliverable lines that prevent requote cycles
The single fastest way to compress a structured-light scanner RFQ into one round is to attach six to ten photographs of the part from front, right, back, left, top, and bottom angles, then tick every deliverable format actually required: STL, STEP, IGES, Parasolid, Geomagic Design X native, Fusion 360, Rhino, SolidWorks, Inventor, Creo, NX, or CATIA; suppliers widen the price range to absorb uncertainty when photo coverage is weak, and they add a transparent per-format multiplier when a native CAD package is selected instead of STEP, so leaving the format blank costs both money and time [S3]. The RFQ should also separate Phase 1 on-site scanning, Phase 2 mesh processing, Phase 3 reverse engineering, and Phase 3-Inspection GD&T into four priced lines rather than asking for one lump sum, because a phase-by-phase breakdown is the only way to compare two scanner vendors apples to apples [S3].
For the assembly-cell context, the RFQ should call out whether the scan is for inspection (dimensional analysis plus a GD&T report), reverse engineering to CAD, or both; reverse engineering adds a parametric build step in Geomagic Design X and pushes the lead time from days to one to three weeks, while pure inspection can return a color deviation atlas in one to three days [S3]. Travel cost is a separate line: within 50 miles of the supplier's lab the travel charge is typically waived, 50 to 200 miles is rolled into the lump sum, and 200+ miles is quoted separately, so writing the site address on the RFQ up front avoids a second round of travel-cost negotiation [S3]. Structured-light scanning captures dense 3D surface data rapidly across an entire field of view rather than tracing a single laser line, so the typical capture takes 2 to 5 minutes for a small-to-medium part and the full workflow from physical scan to finished mesh is usually under 15 minutes for standard objects, which sets a defensible throughput assumption on the RFQ [S4][S5].
Spec mistakes that trigger requote cycles
Four mistakes force a requote: writing "high accuracy" instead of a number, omitting the working-temperature window, picking a deliverable format after the quote lands, and asking for a single lump-sum price without splitting the on-site scan, mesh processing, reverse engineering, and inspection into separate lines; each one is independently enough to send the RFQ back for a second round [S3]. A fifth, less obvious mistake is naming a specific scanner model on the RFQ before the supplier has confirmed the working-temperature and accuracy requirements, because a model named in the brief can anchor the supplier to a configuration that fails the thermal derate and forces a full re-spec at the back end of the cycle [S2][S3]. Buyers who treat the RFQ as a six-line spec sheet and let the supplier name the model have a measurably shorter RFQ cycle than buyers who name the model in the brief, and the resulting quote is typically tighter because the supplier has matched the configuration to the actual working conditions rather than defending a pre-chosen part number [S2][S3][S5].
For lock-related assembly tooling on the same line, a separate locking assembly spec guide walks through the torque, thread, and material lines that should accompany the scanner RFQ so the inspection cell and the joining cell stay in spec together. The next trackable signal is the supplier's response to the working-temperature line: a quote that returns with a thermal-isolation mount and a derated accuracy figure is a defensible response, while a quote that returns with the standard -10°C to 40°C rating attached to a 50°C cell is a red flag and should be rejected on technical grounds before price is discussed [S2][S3].
Spec-level background on the components involved: structured light scanner, and high voltage tester.