FEELER REFLECT JJ983T1-FEAA1A-S Toyota JAT-500 Air Jet Loom Spare Part HL1018 Weft Detector Head

Product Overview

This is a reflect-type feeler head for the Toyota JAT-500 air jet loom. Original part number JJ983T1-FEAA1A-S, our item code HL1018. The head reads the weft by reflected light at the detection point and sends the signal to the loom controller, which confirms the pick and stops the loom when the weft is missing.

On a run-out JAT-500, the feeler is one of the first electrical parts to give trouble, and it gives it slowly. Oil mist settles on the optical face, the reflected signal drops, and the loom starts to stop on picks that were actually woven correctly. Operators raise the sensitivity to keep the loom running, the fault moves to the other side, and eventually the machine stops accepting any setting. Putting a known-good head back in is the quickest way to find out whether the problem is the head or the circuit behind it.

Setup matters as much as the part. The head has to sit at its working distance from the weft path, with the bracket locked and the lead dressed so it does not pull on the connector. A head that is fitted but not set will read erratically no matter how good the part is, so allow time for the gap and sensitivity check after fitting.

The unit is made to OEM-equivalent dimensions, so it mounts on the same bracket and connects on the same lead as the original, with no modification to the loom or to the wiring.

Applications & Compatibility

Widely used in weaving mills, loom repair workshops and spare-parts distributors for Toyota air jet loom maintenance and worn-part replacement projects.

• Compatible with: Toyota JAT-500 air jet loom
• Original part number: JJ983T1-FEAA1A-S
• Our item code: HL1018
• Type: feeler head, reflect type (weft detection by reflected light)
• Function: weft detection, signal to the loom controller
• Note: JAT-500 part; the JAT-600 / JAT-610 / JAT-710 feelers are separate items

Please confirm your loom model and send a photo of the existing head with our sales team before ordering.

Quality Standard

• Manufactured to OEM-equivalent tolerance for direct drop-in installation, no extra modification required.
• Lens surface inspected for scratches, clouding and mould marks before packing, to avoid false weft stops.
• Detection threshold checked at the working distance so the controller reads the same signal as with the original unit.
• Bracket seat and connector position checked against the OEM reference for correct alignment after fitting.
• Model type verified before packing: JAT-500 units are packed and marked separately from the JAT-600 / 610 / 710 type.
• Industrial-grade raw material selected for high-vibration, continuous-running weaving environment.
• Video outgoing inspection can be provided on request before shipment.
• Warranty covers manufacturing defects (case-by-case evaluation). Damage caused by improper installation is excluded.

Specifications

Order & Shipping Information

• Minimum order quantity: starting from 2 pieces.
• Sample order is acceptable for quality evaluation.
• Stock items ship within 5 working days after payment confirmation.
• Neutral export packaging by default; private-label and custom packaging service available.
• Shipping option: DHL / FedEx / UPS express, air freight, sea freight.
• Complete export documents including commercial invoice and packing list will be supplied.
• We ship worldwide to textile markets across Southeast Asia, Central Asia, South America, North America and Europe.

Frequently Asked Questions

Q1: Is this the JAT-500 head or the JAT-600 series head?
This listing is the JAT-500 head, original part number JJ983T1-FEAA1A-S. The JAT-600, JAT-610 and JAT-710 heads are separate items with a different bracket and connector.

Q2: How do I choose between your JAT-500 feeler items?
Send a photo of the head on your loom, showing the housing and the connector side, and we will confirm which item matches your machine before you order.

Q3: What causes weft stop faults on good picks?
Most often a clouded or worn optical face, a head that has drifted out of its working distance, or a damaged lead behind the connector. Fit a known-good head first to separate the head from the circuit.

Q4: Do I need to reset anything after fitting?
Yes. Check the working distance from the weft path and the sensitivity setting after installation, and make sure the lead is dressed so it does not pull on the connector.

Q5: Can I order samples first?
Yes, sample orders are supported for quality checking before bulk purchase.

Q6: What about the warranty?
Warranty is offered against manufacturing defects, evaluated case by case. Damage caused by wrong installation is not covered.