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TK8A

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TK8A

BK Mikro TK8A is a scanner designed mainly for broken tool detection inside the tool changer of machining centers adding little or no additional cycle time. The controller stores up to 512 different tool lengths in memory and is controlled using 24vdc M-Code/Macro I/O combinations, Profibus, Profinet or DeviceNet. The system can check tools whose lengths vary as much as 15 inches from the shortest to longest in the changer. Each of the 512 different tools can have individual tolerance ranges set varying between 0.15 and 25.4 degrees.

(Click here to view the video of scanner working inside CNC tool changer)

BK Mikro TK8A

The Complete BK Mikro TK8A CNC Tool Sensor system Includes :

  • Control unit
  • I/O Unit- BKM9I/O
  • Scanner (motor) - TK8A
  • Connection cable - BKC10
  • Mounting Bracket - BK7-8MB

Principle of Operation:  

First all of the tools lengths need to be taught and stored in the BK Mikro 9 control's memory using a Macro or binary M-code combination which is outputted from the machine's CNC control. These lengths are calculated using the angle away from the home position that the wand travels to before contacting the tip of the tool. Once all of the tool lengths are stored into memory the CNC Tool Sensor system will know what angle to check when a specific tool is  called up. After the tool is finished machining and put back into the tool changer the TK8A will check the length and compare it to the stored data. If the length is within the tolerance window that is set for that tool the unit will output an "OK" signal to allow the machine cycle to continue. If the tool is broken the wand will travel past the stored position and the controller will output a "KO" signal to let the machine know there is a problem and shut down automatically.

Scanner:
  CNC Tool Sensor

Scanner Technical Data: 

  • Housing: Anodized Aluminum
  • Protection Type: IP 68
  • Wand Length: 380 mm, with scanning plate 80 mm x 15 mm (standard)
  • Wand Length: 284 mm, with scanning plate 65 mm x 15 mm Scanning Angle: 0° to 300°
  • Control Unit Connection: Connector, M12x1, 8 pins
  • Temperature Range: 0°C to +80°C
  • Sensing Cycles: > 10 million with normal deceleration

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