A fixed-axis lightguide can only cure whatever sits directly beneath its tip — until the bond face it needs to reach is on a wall, not a floor. The Incure LGT-90-5 solves that with a precision right-angle redirect.
The Fixed-Axis Problem on Automated Lines
A straight Ø5mm lightguide cures surfaces directly in its exposure path and nothing else. That’s fine when every bond face on an assembly sits perpendicular to the lightguide’s natural approach — but housing side walls, PCB edge connectors, and vertical assembly surfaces routinely don’t. On manual stations, an operator can often reposition the part to bring the bond face into the lightguide’s path. On semi-automated or robotic lines, where the lightguide approach direction is fixed by the fixture or the robot arm’s reach envelope, that workaround isn’t available.
The LGT-90-5 mounts onto the tip of any Ø5mm UV spot curing lightguide and redirects its output a full 90° — bringing the cure to a perpendicular bond face instead of requiring the bond face to be brought to the cure axis. It’s built specifically for that fixed-approach-direction scenario: attach it once, and the cure axis now matches the bond face permanently, without rotating the fixture or reprogramming the robot’s approach path for every cycle.
Removing a Handling Step Between Cure Cycles
On lines running perpendicular joints without a 90° terminator, the standard workaround is repositioning the part or the lightguide between exposures — a manual step on manual stations, or an added motion sequence on automated ones. That workaround costs cycle time and introduces part-to-part positioning variation every time it’s performed.
Once the LGT-90-5 is mounted, that handling step is gone. The lightguide approach direction stays fixed; the terminator does the redirecting instead of the part or the fixture. On high-cycle assembly work, removing even a small repositioning step from every cycle compounds into meaningful throughput and consistency gains over a full production run.
Pairing the LGT-90-5 with the Incure LLG-1P-5 single-pole lightguide is the standard configuration for this fixed-axis use case, since the two components are designed for a direct Ø5mm mount with no intermediate hardware — see Incure’s lightguide selection guide for the full LLG range this terminator pairs with.
Email Us if a fixed robotic or semi-automated approach angle is currently forcing part reorientation to reach a perpendicular bond face.
Full-Throughput Aperture Match
The LGT-90-5’s aperture matches the Ø5mm core of the Incure LLG-1P-5 liquid lightguide exactly, and any other compatible Ø5mm lightguide port. There’s no aperture step-down at the connection interface, which means no UV energy loss through the terminator itself before it reaches the bond face. The aluminum body carries a continuous high-intensity UV exposure rating, matching the duty cycle of the lightguide it mounts on.
Because the redirect happens at full aperture with no coupling loss, the LGT-90-5 delivers essentially the same precision cure spot at 90° that the bare lightguide delivers in a straight line — the terminator changes the direction of the UV output, not its concentration or intensity at the bond face.
Application Fit
PCB edge bonds, side-wall connector bonding, and component housing flanges cover electronics assembly work where the bond face sits on a vertical surface relative to the approach direction. Prism bonding in enclosed fixtures and lens-edge joints fit optical assembly. Sensor housing seals, vertical gasket faces, and door-assembly bond lines round out general industrial applications — all cases defined by a bond face oriented perpendicular to a fixed lightguide approach.
The value of a fixed 90° redirect compounds most on robotic dispensing and curing cells, where the approach path is programmed once at commissioning and rarely revisited afterward. Reprogramming a robot’s approach angle for a perpendicular bond face — rather than solving the geometry with a terminator — means re-validating the entire motion path, which is a far larger undertaking than mounting a fixed-angle accessory onto the existing lightguide tip.
Selecting Between Perpendicular and Oblique Access
The LGT-90-5 is one of four configurations in the LGT-Series, distinguished by exit angle (60° or 90°) and aperture size (Ø5mm or Ø8mm). Where a true right-angle bond face is accessible with full 90° clearance, the LGT-90-5 delivers the most direct redirect. Where fixture geometry doesn’t allow that full clearance — a recessed cavity or an angled enclosure wall that blocks a straight 90° approach — the LGT-60-5 covers the same Ø5mm aperture at a shallower 60° angle that fits through narrower approach envelopes. For the wider Ø8mm equivalent of this same perpendicular configuration, the LGT-90-8 covers larger bond faces in one pass rather than requiring the Ø5mm’s more concentrated spot to make multiple passes.
Verifying lightguide exit port diameter before ordering remains the first check regardless of angle — an aperture mismatch at the connection interface loses UV energy that no amount of correct angle selection can recover. See the full LGT-Series lightguide terminators overview for a side-by-side comparison of all four configurations, and pair the terminator with the correct Vison UV-blocking eyewear rating for whichever lamp system drives it. Contact Our Team to discuss terminator selection for a fixed-axis automated line.
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