ROBOT3T THC3T-02 User manual

Version 1.0.4
Copyright 2019 by Robot3T
ROBOT3T
THC3T-02 UP/DOWN OPERATION MANUAL

Table of Contents
1. Device information..........................................................................................................3
1.1 Introduction................................................................................................................3
1.2 Specifications.............................................................................................................4
1.3 Mainboard ..................................................................................................................5
1.4 Divider board .............................................................................................................6
2. Signals summary of THC3T-02 .....................................................................................7
2.1 Power supply..............................................................................................................7
2.2 Arc-voltage.................................................................................................................7
2.3 Potentiometer ...........................................................................................................10
2.4 Output ACR_OK, THC_UP & THC_DOWN (OPTO)...........................................11
3. Setup parameters............................................................................................................12
4. THC3T-02 operations....................................................................................................13
4.1 Principle operating ...................................................................................................13
4.2 Fast connect..............................................................................................................14
5. Fault processing.............................................................................................................17
6. Example for MACH3 configuration:.............................................................................18
7. Warranty Period and Coverage .....................................................................................20
7.1 Warranty Period .......................................................................................................20
7.2 Warranty coverage ...................................................................................................20
7.3 Notes on safety.........................................................................................................20

ROBOT3T- 3C MACHINERY CO., LTD
6/4, 328 Cao Lo Street, Ward 4, District 8, Hochiminh City, Vietnam
Email: [email protected]
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1. Device information
1.1 Introduction
Compact THC3T-02 with up/down output uses arc voltage to maintain a consistent
distance from the plate while the torch is cutting. This allows the system to maintain proper
torch height regardless of variations in the material, of flatness of the cutting bed.
Simplified block diagram:
The THC3T-02 package includes:
-1 main board;
-1 divider board;
-1 potentiometer + cables.
Fig1. Block diagram

ROBOT3T- 3C MACHINERY CO., LTD
6/4, 328 Cao Lo Street, Ward 4, District 8, Hochiminh City, Vietnam
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1.2 Specifications
-Using the potentiometer to set height’s torch
-Voltage divider and noise to obtain the raw signal from the plasma cutting
-Using signal processing an algorithms to derive the voltage stability of the plasma
-Apply an algorithm to support smooth motion.
-Auto calib the arc voltage with any plasma cutter
-Auto detect ARC OK
-Easy to connection, just three outputs: UP, DOWN, ARC OK
-Integrated voltage divider 1:50.
-This version is specify to integrated with Mach3 and LinuxCNC software.
Fig2. Connection diagram

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1.3Mainboard
LEDs Status:
-Power red LED; Run yellow LED (THC ready); Height
green LED (Torch height OK);
-LED1 display “Up”, “Down”, “Height” status of Z-axis;
-LED2 is arc-voltage value from plasma cutter.
LED2
LED
1
Buttons:
-Menu: To change mode
-Up, Down: To change the
display or data in each mode.
Fig3. Main board

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The main parameters of the master board:
Table1. Main parameter
Parameter name
Acceptable
Supply voltage
+24VDC/2A ±10%
Maximum arc-voltage
660VDC
Maximum input voltage of 1:50 divider
6.6VDC
Maximum current of output relays
150mA/100VDC
Weight
300g
External Dimensions (L * W * H)
95x110x45[mm]
1.4Divider board
SW MODE
DIVIDER
SW 1
SW 2
Description
100:1
ON
ON
Voltage divide ratio 1:100
50:1
OFF
ON
Voltage divide ratio 1:50
ON
OFF
EXT-
50:1
OFF
OFF
Voltage input of 1:50
divider EXT(extension)
Fig4. Divider board

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2. Signals summary of THC3T-02
2.1 Power supply
2.2 Arc-voltage
When connecting directly, use the shortest possible cables for connecting the plasma
cutter with THC controller - it is recommended the THC controller to be mounted directly
at the plasma cutter.
Fig5. Power Supply

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Fig 6. Connect ARC-voltage from divider board
CN 1

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6/4, 328 Cao Lo Street, Ward 4, District 8, Hochiminh City, Vietnam
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While being a universal THC, accepting full raw arc voltage for most any
plasma cutter on the market, an exciting new standard feature of this unit is the
addition of a 1:50 divider for an extremely fast, simple installation on most major
brands. There will most likely be a direct connection for this on the outside of the
plasma cutter's unit. Please refer to your plasma cutter owner's manual.
An example of how to connect the THC controller's measurement input with
the output of the very popular Hypertherm Powermax45® - The THC comes
Fig 7: Connecting the plasma source with DIVIDER

ROBOT3T- 3C MACHINERY CO., LTD
6/4, 328 Cao Lo Street, Ward 4, District 8, Hochiminh City, Vietnam
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standard equipped with a low voltage output of 1:50 divider. This ratio is the
most commonly used division in most major brands and there will most likely be
a plug for this connection on the outside of the cutter's unit.
2.3 Potentiometer
To set height from torch to material by the potentiometer. (U mode on LEDs display)
Fig8. Plasma cutter with voltage divider 1:50 output

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2.4 Output ACR_OK, THC_UP & THC_DOWN (OPTO)
If the device operated at auto mode, ARC_OK signal is activated.
Fig10. Arc_Ok, THC_UP & THC_DOWN outputs signal
Fig 9. Connect potentiometer

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6/4, 328 Cao Lo Street, Ward 4, District 8, Hochiminh City, Vietnam
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3. Setup parameters
Press the “menu” button to choice mode need to set:
Table2. Parameters on LED display
No
Mode
Value
Description
1
U
Set-height
U10 to U300
To set height from torch to material in
auto mode by the potentiometer.
factory setting: U=150
2
A
Area for control
A001 to A075
Device will change to auto mode when
the arc voltage from:
[Voltage Set - Area for control] to
[Voltage Set + Area for control]
factory setting: A=75
3
S
Sensitive
S100 to S800
This parameter determines the value
respond of Z axis motion.
factory setting: S=50
4
P
Arc-voltage
P000 to P300
Display the arc voltage value from
plasma cutter.
5
d
Delay time
d001 to d099
The delay time to send ARC_OK from
0.1 to 9.9s: THC will sent ARC_OK
signal after this delay, the main purpose
is Z axis not move down at the first time
of cutting.
factory setting: d=10 (1s)
6
v
steady-state
error
v001 to v099
The steady-state error a range in which
the voltage is set errored, in which there
are signals controlling UP/DOWN
v =0.1-9.9V (±0.1V -> ±9.9V),
factory setting: v = 3.0V (±3.0V)

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7
SW1
STEP/DIR or
UP/DOWN
MODE
Compact THC
SW1
SW2
STEP/DIR
OFF
OFF
UP/DOWN
ON
ON
4. THC3T-02 operations
4.1 Principle operating
Fig11. Principle operating of THC3T-02 up/down
ARC-OK: output signal is activated when the arc voltage (P) is higher than area for
control (A-) and the delay time (d) is finished. Configure for a software input.
UP: output signal is activated when the arc voltage (P) is lower than the steady–state
error (v-) and higher than area for control (A-). Configure for a software input.
DOWN: output signal is activated when the arc voltage (P) is higher than the steady–
state error (v+) and lower than area for control (A+). Configure for a software input.
Note: Both UP/DOWN outputs are activated when ARC-OK signal is activated

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4.2 Fast connect
Step 1: Turn off the plasma cutter.
Step 2: Connect power supply. (fig. 5)
-After switching power on, red LED is turn on, the THC controller's display
shows "cthc" message, a flashing voltage value is presented for 2 seconds and
then run yellow LED blink Turn off THC power and go to Step 3.
-In case of, power LED, run LED or LED 4 digit 7 segment display not turn on
Error.1-page.17
Step 3: Arc_Ok, THC_DOWN & THC_UP output. (fig. 10)
Step 4: Connect Arc-voltage (fig. 6&7)
-Turn on THC3T-02 and wait yellow LED blink. Press the“menu” button 4-
times to select “P” mode (fig.12).
-Turn on plasma cutter and read arc-voltage area on LED display (example: Arc-
voltage area from 110 to 120) Turn off the plasma cutter and go to step 5.
-In case of, THC doesn’t have arc-voltage Error.3-page.17
Step 5: Press “menu” button to select “U”mode and using the potentiometer to set
“set-height” parameter value (fig.13)
-Example: If arc-voltage area on “P” mode from 145 to 155 then:
Set-height = (145+155)/2=150.
Fig12. ARC-voltage parameter

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Step 6: Press “menu” button to select “A” mode (fig.14). This parameter value set
about 30. Device will change to auto mode when:
[Set-height –Area for control] < Arc_voltage < [Set-height + Area for control]
-Example: “U” mode: Set-height = 150;
“A” mode: Area for control = 30.
Device will change to auto mode and turn on relay ARC_OK when:
120 < Arc_volatge < 180.
Arc_voltage (P) = Set-height (U)
Height green LED turn on
Arc_voltage (P) > Set-height (U)
THC_DOWN signal is activated
Arc_voltage (P) < Set-height (U)
THC_UP signal is activated
Fig13. Voltage set-point parameter
Fig14. Area for control parameter

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Step 7: Press “menu” button to select work-screen (fig.16-page.15) and turn on the
plasma cutter to using.
All parameters updated online during operation.
Fig15. Area for control parameter

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5. Fault processing
No.
Code
Name
Causes
Countermeasures
1
Error.1
Power
fault
-The THC is broken;
-The power is not
connected;
-The line of power supply
is broken
-Replace the THC;
-Connect the power supply;
-Check that the power line is
wired correctly;
-Replace the power cable
2
Error.2
Arc-
voltage
fault
-The power of the plasma
cutter is not connected;
-The line of arc-voltage
from divider board to THC
is broken or not connected;
- The THC is broken;
-Connect the power supply;
-Check that the arc voltage
line is wired correctly or
replace;
-Replace the THC.
3
Error.3
Outputs
fault
-The signal is not
activated;
-Don’t have arc-voltage;
-[Arc voltage > (set-
point)
+ (Area of control)] or
[Arc-voltage < (set-point)
–(area of control)]
-Check that the relay line is
wired correctly or replace;
-Check that the arc voltage
line is wired correctly or
replace;
-Set parameters on “U” mode
and “A” mode.

ROBOT3T- 3C MACHINERY CO., LTD
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6. Example for MACH3 configuration:
Fig18. Port setup and Axis selection
Fig19. Input signals

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User need to config steps per, velocity and acceleration suitable to your system.
Fig20. Mill options
Fig21. Motor turning Z axis

ROBOT3T- 3C MACHINERY CO., LTD
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Email: [email protected]
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7. Warranty Period and Coverage
7.1 Warranty Period
12 months after being shipped from our factory.
7.2 Warranty coverage
During the warranty period, we will repair without charge any problems on the
board that occurredwhile it was being used appropriately, and where the cause of
the problem is due to us.
However, the following cases will be not be covered by the warranty, even if the
warranty period has not expired.
- Problems caused by inappropriate handling or use.
- Problems caused by using parts not made or approved by us.
- Problems caused by modifications made to the board that was not authorized by
ROBOT3T.
- Problems caused by disasters, accidents, or fires.
We warranty only the product as delivered, and we do not accept responsibility for
any loss caused by a fault in our product. We will repair the board when the user
sends it to our plant
7.3 Notes on safety
Improper use or disregard of these warnings may result in the injury or death of
people.
Do not, in any manner, process, take apart, or make changes to this product.
When installing this product, we recommend that if technical knowledge
becomes necessary please consult a qualified mechanic.
Do not operate this product with wet hands, wet gloves, or any wet clothing.
Before turning the unit on, secure the safety of others, and read and
understand
all instructions. If you have any questions or concerns, do not continue.