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CHC-200D Capacitive Torch Height
Capacitive Torch Height
Controller
CHC-200D
ADTECH （Shenzhen） CNC Technology Co.,LTD
Read this manual fully before using the
CHC-200D
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CHC-200D Capacitive Torch Height
Ⅰ、Brief Introduction
Our design of Capacitive Torch Height Controller CHC-200D based on over 10
years practice and various requirements from domestic CNC cutting machine
manufacturers.
CHC-200D is a closed-loop control system, with 4 parts: Position Signal
Detection, Signal Process and Transform, Logic Control and Motor Drive,
suitable for flame cutter, above water cutting below 100A plasma cutter, and laser
cutting machine.
Figure 1 shows the working elements of CHC200D: The height signal detecting
device adopts capacitive sensing loop, the detecting loop has to be insulated from
cutting table and installed below cutting torch. Connect the detecting loop byside
of torch via co-axis cable, to sense the height between cutting torch and the
workpiece. CHC200D sends out signal processed by circuit inside of it, to Logic
Control circuit, and then continues with control signal to Motor Drive circuit,
driving the lifter’s motor running accordingly to achieve the goal of adjusting
height between torch head and work piece. Motor-driving is PWM.
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CHC-200D Capacitive Torch Height
I、 Key features
1. Analog circuit instead of SMD Tech on our THC, PWM driving mode,
ensuring high reliability of THC.
2. Circuit-broken protection. On Auto Mode torch lift up automatically in the
situation of HF disconnected, open circuit, short circuit, avoid crashing the torch.
3. Full-closed design, waterproof, dustproof, shockproof.
4. It adopts a method of modularization design, which is convenient for
installation, commissioning and maintenance.
5. Professional circuit-protection design greatly strengthens ability of
anti-jamming. Resister and Capacitor Absorb Circuit is adopted on power
supply, preventing the interference of Surge Voltage and Harmonic Wave to THC
effectively. Pressure Sensitive Circuit protection is adopted, avoiding the damage
of over-voltage, and mis-connecting of power supply. Time-varying circuit is
adopted, avoiding the damage of over-high voltage brought by workpiece under
sensing (protection voltage>91v). Self-recovery circuit is adopted on
signal-collecting part, at this part, the detecting circuit would break off if the
current is over 1.3Ah.
6. Outside height setting, besides the HEIGHT button on operation panel, there’s
a R39⊕ at the back of control box, adjusting the height when the set height is
not right.
Ⅱ、 Specification
Power Supply ：AC24V+10%，50Hz/60H z
lifting motor：DC24V, DC motor
output current：1A-4A
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CHC-200D Capacitive Torch Height
Working temperature：
CHC-200D -10∽60℃，
High frequency coaxial-cable：-10∽200℃，
Detective component/groupware：-10∽350℃，
Accuracy：±0.2mm
Adjustment range within accuracy： from the surface of work piece: 1mm —
20mm
Max output power：150W
Length of HF-cable:200mm∽1500m
Size ：Length*Width*Height：200mm*104mm*50mm
Protection range of cutting-wire：There is no protection function when the length
of HF-cable exceeds 1200mm.
Ⅲ： Appearance and Installation
1、 Shape of CHC-200D：
Figure 2：front panel view，
Figure 3：back sight View，
Figure 4：bottom view ：installation size，
Figure 5: Back view
Figure 2 shows the shape of CHC-200D.
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CHC-200D Capacitive Torch Height
Figure 4 shows the installation size, the hole’s size is 5x10mm, with 4mm screw
to install. THC should be installed above and left side of cutting torch.
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CHC-200D Capacitive Torch Height
2、 Installation of detecting loop: According to our years practice, detecting loop
should be installed lower about 1∽2mm than torch head to avoid the edge
effect during cutting edge of workpiece, and it anti-bump more effectively, as
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CHC-200D Capacitive Torch Height
showed in Figure 6. While on plasma cutting, the detecting loop shall be installed little higher
than the torch head, to avoid the effect of plasma arc voltage.
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CHC-200D Capacitive Torch Height
Ⅳ：Components
As the Figure 7 shows the CHC consists of three parts: CHC-200D, detecting
loop and loop groupware.
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CHC-200D Capacitive Torch Height
Ⅴ：Instruction of Operation Panel Function
1、 The operation panel of CHC-200D as Figure 8 shows:
Power indication:
Auto Button:
Press the AUTO button, the CHC-200D is always on Auto Mode, no matter there
is a auto signal from outside or not. Then the demanded height can be set via
Height button, (keep pressing AUTO during this process). It greatly simplify the
setting of Auto Height Position.
During cutting, THC needs to work on Auto Mode and it should be controlled by
CNC, having nothing to do with this Auto button
Up/Down Button:
It is active on any mode. Priority is always given to Manual mode.
For UP and Down, priority’s given to UP. In case HF gets problem, it’s always
on UP mode, so the Down doesn’t work.
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CHC-200D Capacitive Torch Height
Height:
It is used to adjust cutting torch’s height during Auto Mode. Height increases
when it is turned clockwise. At the first commissioning, turn clockwise maximum
to reach the highest height.
Sensitiveness:
On Auto Mode, the Sensitiveness increases when it is turned clockwise.
Detecting loop connects the socket: One end of HF Cable link with the socket, the
other end link with the probe through loop groupware.
2、Back of CHC-200D:
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CHC-200D Capacitive Torch Height
3、 Spec of detecting loop: Figure 10
HF Cable: The length of the cable can be chosen from 500mm∽1500mm requested by
clients as Figure 11 shows:
Figure 11：HF cable
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CHC-200D Capacitive Torch Height
Ⅵ、Interface Circuit
Figure 12: Installation Handle
Figure 13： Elastic Connector
1、Control circuit of CHC-200D
The CHC-200D consists of 2 pieces PCB, the control circuit as Figure 14
ows:
sh
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CHC-200D Capacitive Torch Height
THC consists of following connecting ports:
Connect with CNC (4Pins JP3 socket)：
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CHC-200D Capacitive Torch Height
Figure 15：Switch connecting mode
Note ： It is on Auto Mode when the switch is closed.
Figure 16：Optical-isolation
Connecting To Torch
Figure 17：Limit Switch mode
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CHC-200D Capacitive Torch Height
Figure 17：Limit Switch mode
MOTOR Drive: S13 and S12 is the output of Motor Drive.
The voltage of MOTOR is DC24V.
Motor driving elements as Figure 19 shows:
Figure 19：MOTOR drive
It adopts PWM mode, the frequency of PWM ranges from 18khz and 36 khz, the
switch operation is made by SP2-1 on the control panel. As Figure 20 shows:
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CHC-200D Capacitive Torch Height
Ⅶ：Connection Instruction
1、 Figure 21 shows the connection of control PCB’s aviation socket.
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CHC-200D Capacitive Torch Height
2、 Connection Of CNC and THC (X1-CNC )
3、 Connection of Down/Up limit and motor(X2-TORCH)
5Pin Socket (plug)
Figure 23: Connection of Down/Up limited and motor
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CHC-200D Capacitive Torch Height
Ⅷ、Commissioning.
1. Up/Down connects with GND, motor moves up and down at maximum speed.
Auto/Manual connects with GND, THC is on Auto Mode. When it is open, the
manual mode is active. In this situation, if the detecting loop is not connected
with THC and THC is under circuit-broken protection function, cutting torch
would keep lifting up. If loop is connected with THC, the cutting torch shall stop
at a height via adjusting the Height button.
On Auto Mode, the height of cutting torch is under control of Height button. At
first commission, always turn clockwise maximum to get the highest height, then
turn anti-clockwise, the height decreases. In case over adjusted, cutting torch
touches the workpiece; motor will be on a shocking-state.
The system always drives motor to make detecting loop close to the balance
position (it stops when loop is around the balance position, 0.2m lower or higher).
The closer, the more slowly the motor runs.
Auto sensitivity meets the request of system when loop is 5—20mm away from
workpiece.
2. As the difference of cutting torch, it might be hard to find the balance position
in all range of Height adjusting. In this situation, DO NOT open the control box,
just debug the⊕ of R39 +⊕ at the back of CHC-200D,
As follow,
2.1. Ensure the Auto Height Control is Enabled, or press the AUTO button and
hold on.
2.2 Turn the Height button clockwise maximum, then the motor will drive loop
move, and turn Height button left and right, the balance position should be found.
Still negative, please try follow ways,
A.lift cutting torch to at least 50mm height, then put it on manual mode.
B. if previous Auto Height too low, then turn the R39 clockwise, the height will
increase. If previous Auto Height too high then turns anti-clockwise, the height
will decrease. DO NOT open control box, and DO NOT damage the R39 during
debug, every time just turn 1/4 round, and record the direction.
C. Press AUTO button and hold on, or turn on the Auto Mode of CNC, adjust the
HEIGHT button of THC, cutting torch shall stop at a position. And the adjusting
arrange changed much.
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3. On Auto Mode, turn the HEIGHT button clockwise, the probe shall lift up,
anti-clockwise, it lifts down.
Note: Our THC’s already passed well commissioning. Do not change the
setting unnecessarily, especially the adjustable resistance inside like R39.
Follow are the info of the adjustable resistances.
R39---1K----Auto height setting
R47---20K----Setting the position under circuit-broken protection(HF part) .
Free Offer……………………………
To make users’ job much easier, we designed a Fixture fixing torch and detecting
loop, made of Aluminum Alloy. From May 10th, we offer it with CHC-200D on
Free Base.
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