user manual v1.0 ohc3t-02: oxy fuel & plasma torch … spark/huong dan su dung ohc3t... · user...

USER MANUAL V1.0

OHC3T-02: Oxy Fuel & Plasma

Torch Height Controller for Mach3

3T Robotics Group

www.robot3t.com

Hochiminh City, Vietnam

3T Robotics Group USER MANUAL V1.0

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I. Product description

OHC3T-02 is a heavy duty, highly accurate gas/ oxy torch height controller designed for use with high performance automated gas/oxy cutting systems.This controller allows the system to maintain proper torch height regardless of variations in the material, of flatness of the cutting bed. This version was designed to work with Mach3 software.

Figure 1. Hardware of OHC3T-02 II. Specifications

Supply voltage: +24VDC

Control accuracy: +/-0.1mm

Distance to workpiece surface: 0 to 30mm

Indicator leds to shows different state of OHC

Inputs to Mach3 software are UP, DOWN, ARC_OK

Can work with plasma power < 100A.

Anti-collision function

Complete with a controller, lifter and all interconnect cablles.


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Figure 2. Connect OHC3T-02 to Z axis

Figure 3. OHC3T-02 includes follow parts: OHC control module, socket connector, sensor ring, elastic connector, insulation part, fixture, cable


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III. Operation of the torch height controller OHC3T-02

Figure 4. Connector diagram of OHC3T-02

a. Signals sumary of OHC3T-02 OHC3T-02 operation based on 4 signals, 1 input signal and 3 output signals One input signal is: - Start/Stop signal (START/STOP SIGNAL), active low (GND_COM) This signal from the controler of CNC software to start and stop a cutting process.


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Figure 5. Input of start/stop signal

Three output signals include: -ARC_OK, UP, DOWN output

Figure 6. ARC_OK, DOWN, and UP output signals


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b. How OHC3T-02 works

- When a command received from the CNC to start cutting, the OHC3T-02

will enable and start send signals to Mach3 software via three output (UP,

DOWN, ARC_OR). User can config these signals on Mach3 to control Z axis

motor.

- When a command received from the CNC to stop cutting, the OHC3T-02

unit will stop and don’t send signals to Mach3 software.

IV. Wiring diagram of OHC3T-02

a. Power supply of OHC3T-02

Figure 7. Using a power +24VAC or + 24VDC to OHC3T-02, indifferent

positive and negative pin of power supply.


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b. Signal to start/stop OHC from CNC software:

Figure 8. Input of start/stop signal, this signal active low (GND_COM)

Figure 9. Connect from LPT breakout board to OHC3T-03 via a relay

+24VDC


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c. Signal to send to Mach3 software ( Output UP, DOWN, ARC_OK)

Figure 10. UP, DOWN, and ARC OK output


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Figure 11. Connect ARC_OK signal to breakout board

Belong to the active level of your breakout board that signal +VDC will apply

+5VDC or +24VDC

Output UP, DOWN is the same connect with ARC_OK. Three signals will

connect to three inputs in breakout board, and user have to config these signals on

Mach3 software.


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d. Cable from the ring sensor to controller:

Figure 12. Cable from the ring sensor to controller

V. Operation panel of OHC3T

Figure 13. Detail operation panel of OHC3T-02


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One variable resistor on operation panel (HEIGHT VR):

HEIGHT VR: It is used to adjust cutting torch height during auto mode.

Height increases when it is turned clockwise.

Six indicator (POWER, PULSE, HEIGHT, AUTO, DISCONNECT,

COLLISION)

POWER LED: Turn on when have power supply

AUTO/MANUAL LED: Turn on when changing to auto mode

UP LED: Turn on when motor of Z axis move up

DOWN LED: Turn on when motor of Z axis move down

ARC OK LED: Turn on when OHC enable motor of Z axis move.

COLISION & DISCONNECT LED: Turn on when cable is disconnected or

sensor ring collision happens. In collision mode, torch would keeplifting up

until collision disappears.

VI. Switchs for OHC3T-03 configuration

Figure 14. DIP switchs for OHC3T-02 configuration


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SW1 SW2 SW3 Function ON ON x Sensitive 100% ON OFF x Sensitive 75% OFF ON x Sensitive 50% OFF OFF x Sensitive 25%

x x ON Safe error 0% x x FF Safe error 5%

Table 1. Value of sensitive and safe error bases on DIP switchs

VII. Operation with Mach3 software:

To integrate OHC3T-02 with Mach3 software, user need to config some

parameters in software.

Figure 15. Highly acceleration of Z axis motor


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Figure 16. Parameters of OHC

Figure 17. Config Ports & Pins on Mach3

user manual v1.0 ohc3t-02: oxy fuel & plasma torch … spark/huong dan su dung ohc3t... · user...

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