Çalışma Prensibi - Işık perdeleri nasıl çalışır?

Plain talk, real shop-floor stories, zero fluff. If you build, buy, or maintain machines, this is for you.

Safety Light Curtain Working Principle (emitter/receiver, OSSD, self-checking)

A safety light curtain is two bars facing each other: a transmitter that shoots many invisible IR beams in sequence, and a receiver that listens for that exact pattern. When anything breaks any beam, the curtain drops its OSSD outputs to “off,” and your machine gets a safe-stop signal. The trick isn’t magic; it’s timing, modulation, and constant self-test. The system scans beams in order, rejects stray light, and keeps checking itself every cycle. If something inside fails, it fails safe. That’s the core.

For tight installs, you’ll see shallow housings like our Ön Ultra İnce veya Kompakt Güvenlik Işık Perdesi—handy when guards live near tooling, vises, or robot fencing.

OSSD outputs and control reliability (Type 4 context)

Most modern curtains use dual OSSD outputs. They monitor each other, so a single fault doesn’t sneak by. Pair those with a safety relay or a PL-rated controller and you get the control reliability you actually need. In higher risk jobs—press brakes, large hydraulics, metal forming—you typically pick Tip 4 curtains because they do continuous internal diagnostics and catch single-fault issues fast. Dont gamble here.

Light Curtain Safety Distance (EN ISO 13855)

Mounting too close is the classic pitfall. Use the standard formula:

S = K × T + C
where K = approach speed (commonly 1600 or 2000 mm/s), T = curtain response + machine stop time, C = reach-in allowance that depends on resolution (beam spacing).

What matters day-to-day?

• T is not just the curtain response; it’s t1 + t2 (sensor + machine). If your brake is slow, S grows.
• C grows as the curtain resolution gets coarser. A 14 mm curtain “sees” fingers; a 30–40 mm curtain is for hands/body.
• Re-measure stop time after maintenance. New pads, new S.

Need tight guarding around end effectors or small-part assembly? Step up the resolution: see our Yüksek Hassasiyet ve Ölçüm Işık Perdeleri for dense beam pitches.

Type 2 vs Type 4 (IEC 61496)

Short version: Tip 2 is for lower-risk stuff and checks itself mainly at start-up. Tip 4 is for higher risk and checks itself continuously during operation. Most production cells with real hazards land in Type 4 land. Match your curtain Tip with your required performance level (PLr) from EN ISO 13849-1. If your risk assessment calls for PL e, you already know where this is going.

Muting vs Blanking (material flow without killing safety)

You’ve got to move pallets, totes, sheets, or runners thru the protective field. Do it clean:

• Susturma: a temporary, automatic bypass when all muting conditions are true—often via extra sensors that detect a load and its direction. Once the load clears, muting ends.
• Karartma: ignore a defined beam area long-term (fixed) or allow a limited “floating” blocked zone that can move a bit. Useful for hoses, fixtures, or small conveyors that must sit in the field.

We ship Type 4 options with both functions. If you’re moving heavy stock, look at our Ağır Makine line; for wash-down or sticky environments, go IP—Su Geçirmez Güvenlik Işık Perdesi.

Point-of-Operation Guarding vs Perimeter Guarding (real-world scenes)

• Point-of-operation (presses, injection molding take-out, pick-and-place): high-resolution, short S, fast T. Hand/finger detection prevents reach-in during a hazardous cycle.
• Perimeter (robot cells, palletizers, lift gates): taller protective heights, corner mirrors for çok taraflı erişim koruması, and muting for staged infeed/outfeed. See: Çok Taraflı Erişim Koruması.

Selection Checklist (resolution, protective height, environment, integration)

• Çözünürlük (beam spacing): 14 mm for fingers; 20/30/40 mm for hand/body.
• Protective height & range: match the opening; keep mirrors clean; plan for vibration.
• Response time (t1) & machine stop (t2): measure, don’t guess.
• Interfaces: OSSD PNP/NPN, EDM feedback, reset (auto/manual), IO-Link/RS-485 if you want richer diagnostics.
• Functions: muting, blanking, basamaklı (stack receivers/transmitters), corner-mirror designs.
• Environment: oil mist, coolant, wash-down, glare. Consider Su geçirmez veya front/side window options like Ön Ultra İnce ve Side window styles.
• Form factor: tight cabinets or door posts? Go Kompakt veya ultra-thin. For standard cells, Genel Kullanım fits most.

Industry Use Cases (speak the plant’s language)

• Press & metal forming: Type 4, 14/20 mm, hard-mount with anti-vibe brackets. Hook OSSD into a Category 4 safety relay; wire EDM to watch your contactors. Re-start requires local reset; no sneak restarts.
• Packaging / logistics: pallet infeed with Susturma sequence; corner mirrors for U-shaped cells; tall curtains (≥1800 mm) for body protection; fork pockets kept clear.
• Injection molding / die-casting: auto take-out needs short T; use high-vis alignment LEDs; add Körleme for fixed sprue chutes.
• 3C electronics & battery: High-precision curtains around jigs for finger-safe detection; tie data into MES via IO-Link for downtime analysis.
• Woodworking / panel lines: dust, vibration; spec rugged housings and IP seals; longer range optics, regular wipe-downs.
• Food & beverage: wash-down and ^chem^ cleaners—go IP and stainless hardware.
• DWS / dimensioning (not just safety): deploy Ölçüm Işık Perdeleri for counting, width/height, and profiling while a separate safety curtain protects the hazard.

Data-Backed Arguments (quick look-up)

(We’ll happily walk thru your S-calcs if you share resolution and stop-time—no spreadsheet drama.)

Why NEW STAR OEM (One-Stop Machine Safety Sensors Manufacturer)

We build and ship safety curtains for real factories—not just spec sheets. NEW STAR OEM supports Tip 4 options, OEM/ODM, private label, and fast sample-to-scale runs. If you need ultra-slim housings, high-res arrays, or odd mounting, we do custom. Explore by duty: Genel Kullanım, Kompakt Güvenlik Işık Perdesi, Yüksek Hassasiyet, Ağır Makine, Çok Taraflı Erişim Koruması, ve Su Geçirmez Güvenlik Işık Perdesi. We also supply laser scanners, mats, interlock switches, photoelectric sensors, artı akış sensörleri for water/HVAC/chemical monitoring—so your safety and sensing stack actually matches.

Quick FAQ (shop-floor style)

• Can I auto-restart after clear? You can, but most teams use manuel sıfırlama near the hazard to stop unexpected start-ups.
• Do mirrors kill range? Some loss, yep; size your optics accordingly.
• What if oil mist coats the window? Plan cleaning; consider IP upgrades and alignment aids.
• Can I cascade bars? Sure—reduces blind spots around fixtures and gates.
• My robot cell needs entry with parts. Kullanım Susturma with correct sequence and indicators. Dont disable safety to move pallets.

Mini checklist before you buy

• Risk level → Type 2 or Tip 4
• PLr target → PL d/e architecture
• Resolution (14/20/30/40 mm) & protective height
• T measured (t1 + t2) → compute S
• Functions: muting, blanking, EDM, cascading
• Environment: wash-down, glare, vibration
• Interfaces: OSSD PNP/NPN, reset, IO-Link/RS-485