Torch Height Control (THC) Manual - FlashCut · PDF file1 Torch Height Control (THC) Manual...

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Transcript of Torch Height Control (THC) Manual - FlashCut · PDF file1 Torch Height Control (THC) Manual...

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    Torch Height Control (THC) Manual

    Torch to Isolation Box Cable Isolation Box to Controller Cable

    Ohmic Sensor Cable (Optional)

    The Ohmic Sensor Cable is 25 feet long. One

    end has female quick connect and the other

    has a male quick connect.

    DB-15 (male) Color

    1 + Varc Violet

    2 - Varc Blue

    5 + Start White

    6 OK to start Red

    7 Ohmic sensor Blue (outside)

    13 - Start Gray

    14 OK to start Yellow

    Minifit Function Color DB 25

    4 Ground Black 19

    6 Output A- Blue 23

    9 Ground/Shield Heat Tube NA

    10 Input A White 1

    12 Input B Gray 2

    13 +5V Red 6

    15 Output A+ Violet 10

    18 Analog In Yellow 3

    Cable Wiring

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    Plug in THC Cables

    1) Set up the Torch Height Control Box (Also called the Isolation Box)

    Plug in the DB 15 on the torch to Isolation Box cable to the

    Isolation box.

    Plug in the DB 25 on the Isolation Box to Controller to the Isolation


    Plug in the Ohmic Sensor Cable (Optional) male quick connect to the

    DB 15 female quick connect.

    Mount the Isolation Box to the Torch Power Supply

    2) Plug the connector from the torch to Isolation Box cable into your torch

    power supply.

    Setting Up the THC Assembly

    DB 15 DB 25



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    3) Plug in the Mini Fit Molex connector in the Mini I/O slot on the controller

    4) Make sure that the Ohmic Sensor Cable is connected to the torch (Optional)

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    Preparing Plasma Table for Use

    1) Verify that you meet all electrical power requirements, which are defined

    by the torch.

    2) Verify that the air compressor is set up correctly.

    Is it powerful enough for your needs?

    Do you need and air filter or air dryer?

    Does it keep pressure at the recommended range? If not, you may

    need an additional regulator.

    3) Verify that everything is hooked up correctly to the power supply and to

    the torch.

    4) Verify that the power supply settings are correct, which are material

    dependent. On many torches you can change the amperage, air pressure,

    and type of cut.

    5) It is recommended that an initial test piece is cut when the torch is initially

    set up to verify that the torch is working properly with our software. The

    test cut can be cutting a short line along an incline.

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    Configuring Flashcut Software to Use THC (Version 4)

    1) Install Flashcut Version 4 on your computer

    2) Save the CustomVars.txt file to the C drive under ProgramData>FlashCut CNC>FlashCut

    CNC 4. The picture below shows what the file looks like. Do not change this file.

    3) In the configuration screen under Torch Height Control make sure that Use Torch Height

    Control is checked. Make sure that the touch-Off at start is checked if you are using the

    Ohmic Sensor. Refer to the picture below for the recommended settings.

    Torch Height Control: References the voltage difference from the tip of the torch to the metal being cut to adjust height Arc Voltage Divisor: ? Pierce Height: The initial height of the torch from the material during pierce Cut Height: Constant height of torch during cut Lock Out Factor: % of the programmed feed rate which turns off THC. This feature may improve cuts around corners. Lock Out Hysteresis: After THC has been locked out, this is the amount (feed rate) that needs to change before THC is initiated again. Touch-Off at Start: The torch will touch the metal as a reference first before piercing when using an Ohmic clip. Feed Rate: The feed rate at which the torch seeks the material for Touch-Off. Monitor Input Line: The input line of the Ohmic Sensor Sensing Limit (Z Prog Coord): The distance the torch will move before stopping when seeking the material.

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    4) In the configuration I/O Output screen make plasma output line 1.

    5) Configure the input line screen as shown below regarding the Ohmic Sensor and OK to Start.

    Input 19: Function= Control, Description= Ohmic Sensor, Wiring= NC, Debounce= 0.003

    Input 20: Function=Control, Description= OK to Start, Wiring= NO, Debounce= 0.001

    Configure debounce during motion to 115, and debounce when idle to 0.250

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    6) Make two M-Codes to Control Output Lines

    a) M-50: Description= Torch On, Program Line First Action= M-Cd, Delay= 0.5, Ln1= 1

    b) M-51: Description= Torch Off, Program Line First Action= M-Cd, Delay= 0, Ln= 0

    Make two M-Codes to Execute Macros. Copy the pictures below. a) M-80: Description= Start ATHC b) M-81: Description= Stop ATHC

    M-81 M-80

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    7) Edit the M-Code Execution screen as shown below

    8) If you want to use cutter compensation, then make tools in the tool library with the proper

    kerf diameter depending upon the settings and material you are cutting. Ignore this step if

    cutter compensation is not being used.

    9) You should be ready to cut!

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    Z-Axis Lifter Features




    Robust (Works with torch or router)

    Adjustable torch position

    Magnetic Breakaway attached to input line sensing for superior torch protection

    and safety

    This picture shows the input line hooked up to the magnetic breakaway

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    This picture shows the functionality of the magnetic breakaway.