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CLP-03 Auto Clipping Control Unit

Main Features
  • Uses Rotary Encoder to calculate the veneer length, as well as to detect the speed variation of clipper conveyor.
  • Uses Photoelectric sensors to detect clipping knife left-right position, as well as determines veneer front-cut action.
  • Utilises newly design high precision electronic controller to precisely calculate the “clipping compensation time” for front-cut, clipping knife left-cut and right-cut, as well as veneer clipping at different clipper conveyor speed.
Introduction
From our survey and knowledge on the clipping control unit of Air Clipper used in plywood mill, we classified it into 3 common types:

◊ Limit Switch Control: This type of clipping control uses a Limit Switch as a clipping sensor. It uses the limit switch ON signal (when veneer touches the limit switch) to activate the “veneer-clip” action. This type of clipping control is considered to be the most inaccurate among the others, even at constant clipper conveyor speed!

◊ Photoelectric Sensor Control: This type of clipping control uses a Photoelectric Sensor as a clipping sensor. It uses the sensor ON signal (when veneer passes the sensor sensing area) to activate the “veneer-clip” action. This type of clipping control is better to maintain if compared to limit switch control. However, it still shows very poor clipping accuracy, especially when clipper conveyor speed varies rapidly!

◊ Rotary Encoder Control: This type of clipping control uses a Rotary Encoder to “count” the veneer length continuously. Once its “count” matches the preset count value of a counter, a “veneer-clip” action will be activated. In fact this type of clipping control should be the best among the others. However, due to the poor design of the clipping control system, its clipping accuracy is disappointing too, especially when clipper conveyor speed varies rapidly!

As such, we have studied the root of the existing problem, and have successfully designed and developed CLP-03 – Auto Clipper Automatic Clipping Device.

The outstanding benefits that this device contributes are:

  • Accurate veneer clipping length (10mm difference and below), even at rapid changes in clipper conveyor speed.

  • Easy-to-set, and Easy-to-switch between Long-cut veneer length and Short-Cut veneer length.

  • One-step setting/adjustment for veneer front cut length and clipping compensation time.

  • User-friendly and easy-to-maintain control unit.

Specification
Model

CLP-03

Power Supply Source Voltage Single phase 220/240 VAC
Power Rating 80 Watt
Input Rotary Encoder Type OMRON E6B2-CWZ6C  
Supply 5 ~ 24V VDC
Current 80 max. mA
Output NPN open collector  
Precision 360 ppr
Photo Electric Sensor Type

SICK CDD-40N
Diffused Reflection

  
Supply 10 ~ 30V VDC
Detecting Distance 40 cm
Current 30 max mA
Output NPN open collector  
Operation Light ON  
Photo Electric Sensor Type

SICK CDD-40P
Diffused Reflection

  
Supply 10 ~ 30V VDC
Detecting Distance 40 cm

Current

 30 max mA
Output PNP open collector  
Operation Dark ON  
Counter Type LINE SEIKI G48-305  
Supply 100 ~240V VAC
No. Digit 6  
Input Contact/open collector Digits
Output Open collector  
Output Type Relay/Open collector selectable  
Current (max) 100 mA
Panel Dimension W x H x D 220 x 145 x 330 mm

 

Ordering Information
Product Code Description
CLP-03 Auto Clipping Control Unit
Spare Parts  
EN-CLP-03T1 CLP-03 Power Supply Card
EN-CLP-03B1 CLP-03 Main Control Card
EN-CLP-03TR CLP-03 Transformer P:220/240, S:15/0/15
EN-CLP-03T125 CLP-03 Power ON Switch
EN-ASN-311 Selector Switch
EN-P40 Clip Compensation Potentiometer (1-Kohm)
EN-E6B2-CWZ6C Rotary Encoder, 360 ppr
EN-CDD-40N Photo Electric Sensor, NPN
EN-CDD-40P Photo Electric Sensor, PNP
EN-G48-305 Counter