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HOME > Technology > Conveyor type needle detectour > Trouble sheeting
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
interlining fusing interlining fusing
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)
4.Trouble shooting for needle detector
There are some factors when the machine dose not work correctly.
Please check the following points.
aDDirt of belt
bDWrong movement by noise from out side
cDWrong movement by noise from inside
dDWrong movement by inferior goods
aDDirt of belt
Please clean conveyor belt every week well. The belt surface dose not become dirty.
Because the good is put on a belt.
Please clean behind of belt. Consciously too. Some dust that includes iron will Stack behind of belt by daily use.
When the dust stacks on behind of belt, the dust will respond to needle detector even the goods dose not include broken needle.
If possible, please take out a belt from a machine and wash it with detergent.
In case of bad dirt, it is necessary to change a belt.
Why dose not stop conveyor belt even iron on a belt respond to needle detector when conveyor belt switch is on without goods on a belt?
Our needle detector is equipped with detecting sensor that checks broken needle And photo sensor that recognize a goods.
The detecting sensor is always working. But the photo sensor decide whether the machine stops conveyor belt or not when the photo sensor recognize s goods.
In other word, detecting sensor dose not stop conveyor belt even needle detector has detecting response when photo sensor done not recognize a goods.
The photo sensor locates the both side of conveyor belt. The photo sensor is set 5mm height from belt surface. The goods (the thickness less than 4mm) that has height less than the height of photo sensor light pass through under photo sensor light so that needled detector can not recognize goods and dose not stop conveyor belt.
Generally goods has 7mm height over. We believe all goods will be recognized by photo sensor. This is the reason why the belt with iron dose not stop. When machine detects dirt on the belt, one of detective position display lamp (HN-600C has 8 pcs of lamps and HN-610C/620C has 10 pcs of lamps) will turn on and off. Or detecting signal level monitor of HN-610C/620C will reach to red level. Iron as dirt on the belt turn on same detective position display lamp regularly when conveyor belt run.
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bDWrong movement by noise from out side
When the goods on the belt is brought to detecting sensor and noise from out side that influences magnetic field of detecting sensor comes to detecting sensor, the machine will stop conveyor and make an alarm.
Out side noise as follow.
Clutch motor, sewing machine, cutting machine, packing machine, large transformer, spray gun for stain removing, vacuum motor, elevator, large fan in factory and movable moving large metal object like train, welding machine, high-tension wire.
When operating machine, the operator should not put metal objects like hand phone, key, watch and so on.
And also do not run metal hanger stand near the needled detector.
If some oust side noise influence, we need to find out noise source and move the machine to other place or move away the machine that influence to needle detector.
If large fan is set above needle detector, we recommend to turn it off.
If detective position display lamp turn on under power switch is on and start switch is off even you can not determine noise source, you can judge that the machine receives out side noise.
All machine is power off in the night except the needle detector. If needle detector receive out side noise, something in the factory influence to the needle detector.
In this case, we need to find out the machine that influence to magnet field
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cDWrong movement by noise from inside
Inside noise from needle detector is that needle detector itself generate.
When install the machine, please fix it by adjuster bolt completely. In case of unstable floor, the machine will receive influence(vibration) and it will lead to wrong movement. Please try to reduce this vibration by put wooden plate (20cm x 20 cm). and also check fixing screw for machine cover. If the machine cover is not Fixed, the cover makes vibration and It will be caused wrong movement.
A bearing on a machine has sometimes been magnetized. In this case, we need to remove magnetism from a bearing to avoid wrong movement.
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dDWrong movement by inferior goods
Some of dyestuff response to needle detector. In some case, Only one of colored goods pass through needle detector. But the others colored goods dose not pass through Needle detector.
Some shoes uses rubber material that include metal iron. In this case, this shoes response to needle detector. Because even each iron is very little, needle detector response against total quantity of very little iron. In this case, even though handy type needle detector, it is very difficult to detect them.
Generally handy type needle detector is pressed a goods and check broken needle.
In this case, handy type needle detector can detect smaller iron that conveyor type Needle detector. But detecting area of handy type is very narrow. This is the reason why handy type needle detector can not detect very little iron.
¦Deterioration of magnetic force.
Although needle detector uses permanent magnet for detecting sensor, magnetic force become weak for long term use.
Please check test sample piece on regular position before operation.
Notice
HN-600C was discontinued on Feb.1997 and started to sell HN-610C/620C.
HN-610C was discontinued on May.2003 and started to sell HN-630C/640C
HN-630C was discontinued on Jul. 2005 and started to sell HN-650C/660C
HN-650C was discontinued on Jul. 2008 and started to sell HN-670C/680C
Now we have started to sell HN-670C/680C that is equipped LCD monitor from 2008.
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