Woyda Elektronik Torch Height Control AR24-2

Torch Height Control AR24-2

For good results with oxy-fuel, Plasma or Lasercutting a constant distance of the torch tip to the plate surface is essential. This can easily achieved by using the height control AR24-2, wich allows a continuous adjustment of the torch hight.

Description

Torch Hight Control AR24-2 The AR24-2 thc is working with the principle of capacitive height measuring. A steel ring arranged around the torch forms a variable capacity to the plate. This allows a contactless measuring of the distance between ring and plate and so linear correction of the torch height.
The sensor input of this THC system is protected against high voltage discharges, so that the device can be used jointly with plasma torches.
The measured distance is continuously compared with the internal predefined set value of the distance. The difference of both controls the internal switched PID - motor amplifier. This amplifier can drive DC motors up to 24VDC. The motor current is limited by an internal protection circuit, of which threshold can be adjusted up to 5.5A.

For the power supply you just need a simple transformer with an output voltage of 24VAC and 150VA.

To configure the parameters of the AR24-2, the setup software (Stock No. 02923), the programming adapter (Stock No. 02924) and a free COM port are required.

Stock-No. 02912-108 Description: Torch Height Control AR24-2

Functions

The Cable Break Detection prevents the torch colliding with the workpiece. Recognising a defective cable it will lift up the torch in automatic mode.
In case that the sensor contacts a workpiece, the collision recognition will lift up the torch with maximum speed, too.
The open-collector output signal 'In Position' makes it possible to realize external functions like an ignition hight detection when using plasma torches.
The AR24-2 torch height control is completely configurable by the setup-software (stock-No. 02923 ) running on a Windows © based PC. The regulating parameters are adjustable for a wide range of lifter motors, sensor systems and mechanical configurations to obtain a very high distance regulating precision.
After entering the automatic mode of the AR24-2 a configurable ignition hight allows to ignite on a different hight which is a percentage value of the actual nominal hight. After a delay time the torch will move to the nominal hight.
The AR24-2 thc supports alternatively tachy lifter motors or speed feedback by using the motor voltage with IxR-compensation.

The AR24-2 is not suitable for cutting under water or with water spray.

Specifications

Distribution Voltage:................	24VAC/150VA
Lifter Motor:............................	Max. 24VDC, max. 5,5A, with Permanent magnet
Output Current:.......................	Max. 5,5A (short circuit resistant). The current limitation is adjustable.
Principle of Regulation:...........	(Servo Amplifier): Current limited, linear PWM amplifier with armature voltage feedback and IxR compensation or tachy feedback.
Principle of distance measurement:.........................	Capacitive, with ring sensor and teflon cable. The characteristic curve is linearized. Please note: This measuring principle is not suitable for cutting under water or with water spray.
Measuring Accuracy:................	(Distance) better than +/-0,05mm
Sensor cable:..........................	Coaxial cabel; a length between 500mm to 1500mm is suitable when using a teflon cabel (40pF/m)
Controllable distance:.............	appr. 2mm to 40mm.
Sensor Typ: .............................	Ring or horse shoe sensor, steel.
Electrical Inputs:.....................	switches, tentative for UP / DOWN, switch AUTO / MANUAL for mode selection, limit switches TOP / BOTTOM (nc). For input, the inputs must be shorted to GND.
Switching Outputs"In Position"	Open Collektor (NPN-Typ) output, max. load 45V / 150mA. The distance window width for this signal is configurable (1).
Environment Temperature:......	Torch Height Control AR24-2 : 0°C bis +70°C, Coax-Cable: 0°C bis +200°C
Dimensions:.............................	Enclosure without connectors: 175mm x 80mm x 62mm. Enclosure with connectors: 225 x 80mm x 62mm. For the mating connectors appr. 200mm are required additionally.
Protection Class:......................	IP 64 (dustproof, waterproof)
Weight:....................................	(without connectors) 870g
Connectors:...............................	8-way (DIN 43652 Standards); BNC
Delivery Scale:..........................	Distance controller AR24-2 incl. mating connectors (DIN 43652 Standards) and EMC cable glands for shielded cables, but without contacts.

to change the AR24-2 THC parameters

the setup-software ( Stock-No. 02923 ) and the programming adaptor ( Stock-No. 02924 )

will be needed.