Plant manager, biscuits. We want to check product thickness after the oven, target 7.0 mm, reject outside ±1 mm. Today an operator checks 10 pieces an hour with calipers. I saw Hermetry Forge listed for production and quality and hoped it could take the measurements, track out-of-tolerance counts per shift and give the line a reject signal.
Two questions: what sensor gets 1 mm repeatably on a moving belt (0.4 m/s, product is light brown, slightly shiny)? We tried a cheap ultrasonic sensor and it jumps 3 to 4 mm. And is Forge something we can switch on? I can’t find it on our plan page.
Ultrasonic won’t do 1 mm on small moving products, the beam is too wide. Laser triangulation is the usual answer, a sensor head above the belt with a reference on the belt surface. Plenty of industrial heads do ±0.05 mm. Shiny surfaces can be tricky, ask for a demo on your product.
Thanks, I’ll get a demo. Any idea on the Forge part?
I looked into this for a friend’s small bakery. I couldn’t find a doc page for Forge either, so I can’t tell you what it does for quality or how it gets on a plan.
What works with the normal IoT part: have the sensor’s controller (or a small PLC) send the thickness of each piece, or the min/max/average per 10 s, as telemetry, e.g. {"thick_mm": 7.12, "rejects": 3}. Then an alarm rule on the profile for out of tolerance. There’s no „between“ operator, but you can group conditions with any:
{ "any": [
{ "key": "thick_mm", "op": "<", "value": 6.0 },
{ "key": "thick_mm", "op": ">", "value": 8.0 }
] }For counts per shift, send a growing rejects_total counter and chart it with the increase aggregate per hour. The reject gate itself must be driven locally by the sensor controller or PLC, not from the cloud; a belt at 0.4 m/s can’t wait on a round trip.
The conditions reference is Alarm conditions reference.
Clear, thank you both. Demo of a laser head next week; the supplier’s controller can push the reject gate and give us an analogue output we’ll send to Hermetry. Out-of-tolerance rule is set up with test data. Calipers stay until we trust it.
- Du musst angemeldet sein, um auf dieses Thema antworten zu können.
Mitdiskutieren
Melde dich an, um Fragen zu stellen und zu beantworten, hilfreiche Beiträge mit „Gefällt mir“ zu markieren und die Antwort zu kennzeichnen, die dein Problem gelöst hat. Jeder Beitrag bringt Punkte und Stufen.