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00D3100
Dancer Positions Sensors (2)

The DPS dancer arm sensors use a non-contact hall effect design for high accuracy and long life. The detect the dancer arm position and send it to a controller that can adjust the tension on the web or in some cases change the air pressure on a pneumatic cylinder attached to the arm to increase or reduce the pressure on the web.
ProductDescription
964509POWER SUPPLY,24VDC
964518DPS60A,DUAL,SENSOR,POSITION


00D3600
Tension Sensors (11)

The MB load cells are for directly measuring the tension in continuous unwind and rewind web applications. They are low voltage differential transformer (LVDT) type for closed loop tension control systems like Nexen's TC920V and RSTC1000 but can generally work with most closed loop control systems. Closed loop tension control systems tension accuracy are around 1-2% vs open loop systems being around 5-10% so are selected based on the materials sensitivity to tension variation. The MB load cells are very accurate, can be mounted at any angle, suitable for symmetrical or asymmetrical web paths, withstand extreme overloads without damage.
ProductDescription
911996MB25B*SENSOR,TENSION,50
912000MB33A*SENSOR,TENSION,500
911991MB11B*SENSOR,TENSION,10
912609MB05B*SENSOR,TENSION,10,SIDEMT
911999MB25A*SENSOR,TENSION,100
912147MB25A*SENSOR,TENSION,100,30'CABLE,SPCL
912148MB25A*SENSOR,TENSION,100,50'CABLE,SPCL
911998MB41*SENSOR,TENSION,1000
911995MB11A*SENSOR,TENSION,20
912610MB05A*SENSOR,TENSION,20,SIDEMT
911889MB33B*SENSOR,TENSION,300
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00D3200
Diameter Sensors (3)

Diameter sensors are used with open loop tension controllers like Nexen's TCD600 to indirectly estimate the web tension based on roll diameter or RPM. Open loop systems tension accuracy is around 5-10% vs a closed loop system being 1-2% so is selected based on the materials sensitivity to tension variation. The RPM sensor consists of a proximity sensor that detects an arm that revolves with the roll shaft. This is the least accurate and/or flexible configuration. An optical encoder can be added to work in conjunction with the proximity sensor to measure the amount of web passing a point in the system improving accuracy and adding flexibility in the materials or thicknesses run. Another sensing method uses an ultrasonic sensor that bounces a a sound wave off the roll diameter to calculate its diameter and uses this to generate a tension.
ProductDescription
912068SWITCH,PROXIMITY*10-30VDC,N.C.
912140ENCODER,W/WHEEL,100 PPR,12 INCH
912127SENSOR,ULTRASONIC,ANALOG


00D3700
Web Guide Sensors (6)

Web guide sensors detect the location of the edge of a moving web and send a signal to a controller like Nexen's AE120 to drive an electric actuator that adjusts the roll or roller angle to keep the web tracking precisely through a process to get consistent results. They can be optical, ultrasonic, or line following types depending on the material.
ProductDescription
912085PH16B*PHOTOHEAD
912626PH21*PHOTOHEAD
912662AWL280A*PHOTOHEAD,AUTO WIDE
912721AS10-D*PHOTOHEAD AMPLIFIER,GC300
912153SENSOR,ULTRASONIC,UH01,W/SCREWGUIDE
912119LH100*PHOTOHEAD,LINE FOLLOWER