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» Hot Melt Glue Detector TH
Quick, non-contact detection of hot melt glue (infrared)
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Conforming to EMC Directive(TH-12CPS only) |
Features
Miniature sensor head [Spot type]
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The sensor head can be mounted in a congested and tight place as it has a miniature size of W18 x H33 x D23 mm W0.709 x H1.299 x D0.906 in.
Further, since a red alignment marker has been provided, setting can be done while confirming the detection point projected on the work-piece.
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Wide sensing area [Long sensing range type]
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Since the view field is ø30 mm ø1.181 in at a sensing distance of 300 mm 11.811 in, the hot melt glue can be detected even if its position of application varies slightly.
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Sensitive and reliable detection
The spot type reliably detects a hot melt drop of 3 mm 0.118 in diameter at 85 ℃ 185 ℉, or more, and the long sensing range type reliably detects a hot melt drop of 6 mm 0.236 in diameter (equivalent to 3 x 10 mm 0.118 x 0.394 in) at 100 ℃212 ℉ or more.
Long sensing range 300 mm 11.811 in [Long sensing range type]
A long sensing range of 300 mm 11.811 in max. is possible. Hot melt glue can be reliably detected not only on small pharmaceutical or confectionary boxes, but also on large cardboard boxes.
Suitable for high speed production line
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As the response time is 1 ms or less, the TH series reliably detects hot melt adhesives even where product boxes flow extremely fast.
(However, for the long sensing range type, this is valid for a sensing distance of 200 mm 7.874 in or less.)
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Sensor head with operation indicator [Long sensing range type]
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Since the operation indicator lights up when hot melt glue is detected, position alignment of the sensor head is easy.
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Easy start-up by teaching
The optimum sensitivity can be easily set by the teaching method.
Moreover, since the teaching is done with the boxes moving, it is not required to stop the production line for teaching.
Eight-channel registration
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Since sensitivity settings for eight channels can be stored, product changeover is smooth. The required channel can be selected either by the front panel or by external channel select inputs.
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Three functions for inspecting hot melt glue application
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1. Sensitivity level set-up [To inspect quantity of applied hot melt glue]
- The sensitivity level (operating threshold level) can be adjusted over a scale of ten steps after the teaching. It enables detection of hot melt glue of a certain amount or more, but not inadequate glue.
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2. Presence evaluation [To inspect presence of hot melt glue on every box]
- The synchronization signal corresponding to box passage is input into the controller and if the sensor detects even a small amount of glue while the box is passing, the result is OK.
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Note:
An external synchronization signal (corresponding to box passage) is needed for using this function.
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3. Length evaluation To inspect the length of hot melt bead on every box
- The sensor evaluates the length of the hot melt bead as OK or NG. Since evaluation is done with the synchronization signal corresponding to the box passage input into the controller, the sensor adapts to any change in the line speed.
Note:
An external synchronization signal (corresponding to box passage) is needed for using this function.
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OFF-delay timer
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The OFF-delay timer extends the output signal for an approx. 40 ms fixed time period. This is useful for detecting very short hot melt beads on a quick production line or for sending the signal to a device having a slow response time.
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