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HOME > Technology > Conveyor type needle detectour > Characteristic of needle detector
conveyor type needle detectour conveyor type needle detectour
1.Characteristic of needle detector
2.For improvement of detecting accuracy
3.Test by test piece
4.Trouble sheeting
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1.Purpose and use for interlining
2.Classification of interlining. A kind of an adhesive and use
3.Trouble shooting of interlining
Technical information (conveyor type needle detector)
PDCharacteristic of needle detector
The difference of sensitivity by height
Generally needle detector has characteristic that the sensitivity is different by the height from belt surface The needle detector detects 1.2mm or 1.0mm iron ball at most weak point. This means the machine that can detect 1.0mm iron ball will detect under 1.0mm iron ball.
For example, In case of about 0.9mm iron ball, even it is not caught by first detecting. it will happen that it is detected by second detecting under the detected garment is up side down.
gm|UOOb's CONDITION
HN-600C can detect 1.2mm iron ball at most weak sensitivity area (B) when sensitivity level 8 over and can detect under 1.2mm iron ball at (A) area near belt surface. To be exact, the most weak sensitivity point is 55-65mm high from belt surface. HN-600C can detect 1.2mm iron ball (sensitivity level 8 over) at this points.
In case of HN-610C early model, Before serial No 10599, The 99 means that the machine was made in 1999 and 105 means the machine is 105th machine in the year.
HN-610C early model is same as HN-600. the sensitivity near the belt surface is stronger and can detect ӂPDO iron ball To be exact, the most weak sensitivity point is 55-65mm high from belt surface.
HN-610C can detect 1.0mm iron ball (sensitivity level 8 over) at this points.
In case of HN-610C second model, after serial No 10699, The 99 means that the machine was made in 1999 and 106 means the machine is 106th machine in the year.
HN-610C/620C ( after serial No.10699) has been changed magnet and coil position up side down. This machine character is different from old model. If the HN-610C/62C can detect 1.0mm in (B) part at sensitivity level 8 over, It will be able to detect under 1.0mm iron ball. Because (A) part is more Sensitive than (B) parts.
To be exact, most weak sensitive point is 10-20 mm high from belt suface. HN-610C/620C can detect 1.0mm iron ball (sensitivity level 8 over) at this position.
Sensitive characteristic and the direction of alien substance
Generally a shape of alien substance is not sphere. When a alien substance goes into Needle detector, the detecting result will be different.. it is depend on the direction of alien substance.
(A) (B) (C) are same alien substance which is slender.
Sample (A) is most easy to be detected. Next is sample (B). the worst is (C).
In case of changing direction, there is some possibility that it would be detected by second detecting even it was not found out at first detecting
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