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Cod. 006.0001.1960
03/05/2019 V.2.2
Discovery 172T

Instruction manual

ENG

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Summary of Contents for Weco Discovery 172T

  • Page 1: Instruction Manual

    Cod. 006.0001.1960 03/05/2019 V.2.2 Discovery 172T Instruction manual...
  • Page 2 Cod. 006.0001.1960 Discovery 172T 03/05/2019 V.2.2 ENGLISH WELD THE WORLD...
  • Page 3: Table Of Contents

    11.3 LOADING A JOB ............................47 11.4 SELECTING JOBS USING THE TORCH BUTTONS ................47 TECHNICAL DATA ............................ 48 12.1 DISCOVERY 172T ............................. 48 WIRING DIAGRAM ............................ 50 13.1 TORCH CONNECTOR (front panel) ......................51 13.2 REMOTE CONTROL CONNECTOR (back panel)..................51 SPARES ..............................
  • Page 4: Introduction

    Cod. 006.0001.1960 Discovery 172T 03/05/2019 V.2.2 ENGLISH WELD THE WORLD INTRODUCTION IMPORTANT! This handbook must be consigned to the user prior to installation and commissioning of the unit. Read the "General prescriptions for use" handbook supplied separately from this handbook before installing and commissioning the unit.
  • Page 5: Presentation

    ENGLISH WELD THE WORLD 1.1 PRESENTATION Discovery 172T is an inverter DC TIG/MMA portable welding power source. The sturdiness of the components of this unit makes it a reliable working companion for workshop and outdoor applications. The available DC TIG functions and digital control make this unit ideal for maintenance, building con- struction, and light metalwork.
  • Page 6: Installation

    Cod. 006.0001.1960 Discovery 172T 03/05/2019 V.2.2 ENGLISH WELD THE WORLD INSTALLATION DANGER! Lifting and positioning Read the warnings highlighted by the following symbols in the “General prescriptions for use”. 2.1 CONNECTIONS TO THE MAINS POWER SUPPLY The characteristics of the mains power supply to which the equipment shall be connected are given in the chapter entitled “12 TECHNICAL DATA”...
  • Page 7: Rear Panel

    Cod. 006.0001.1960 Discovery 172T 03/05/2019 V.2.2 ENGLISH WELD THE WORLD 2.3 REAR PANEL ○ Welding power source ON/OFF switch [Item 1]. ○ Remote control connector [Item 2]. ○ Connector for gas feed hose [Item 3] • cylinder-generator ○ Power cable. [Item 4].
  • Page 8: Preparing For Mma Welding

    Cod. 006.0001.1960 Discovery 172T 03/05/2019 V.2.2 ENGLISH WELD THE WORLD 2.4 PREPARING FOR MMA WELDING 1. Set the welding power source ON/OFF switch to “O” (unit off). 2. Plug the power cable plug into a mains socket. 3. Choose the electrode based on the type of material and thickness of the workpiece to be welded.
  • Page 9: Preparing For Tig Welding

    Cod. 006.0001.1960 Discovery 172T 03/05/2019 V.2.2 ENGLISH WELD THE WORLD 2.5 PREPARING FOR TIG WELDING 1. Set the welding power source ON/OFF switch to “O” (unit de-energized). 2. Plug the power cable plug into a mains socket outlet. 3. Connect the gas hose from the welding gas cylinder to the rear gas connection.
  • Page 10: User Interface

    Cod. 006.0001.1960 Discovery 172T 03/05/2019 V.2.2 ENGLISH WELD THE WORLD USER INTERFACE Discovery 172T L10 L11 L26 L27 L29 L28 CODE SYMBOL DESCRIPTION This LED illuminates to show an anomaly in the operating conditions. Illuminates to show the last voltage and current values measured during welding.
  • Page 11 Cod. 006.0001.1960 Discovery 172T 03/05/2019 V.2.2 ENGLISH WELD THE WORLD Illumination shows that the following parameter can be set: Q-START Illumination shows that the following parameter can be set: DYNAMIC ARC Illumination shows that the following parameter can be displayed: MULTI TACK...
  • Page 12: Unit Power-Up

    Cod. 006.0001.1960 Discovery 172T 03/05/2019 V.2.2 ENGLISH WELD THE WORLD Data setting: The display shows the acronym of the parameter to be set. Welding: The display shows the effective amperes value during welding. HOLD function: The display shows the average current value measured over the entire welding period (excluding the starting and ending slopes).
  • Page 13: Reset (Load Factory Settings)

    Cod. 006.0001.1960 Discovery 172T 03/05/2019 V.2.2 ENGLISH WELD THE WORLD RESET (LOAD FACTORY SETTINGS) L10 L11 L26 L27 L29 L28 ACTIVATION ACTIVATION The reset procedure involves complete restoration of the default values, parameters and memory set- tings set in the factory.
  • Page 14: Set-Up (Initial Set-Up Of The Welding Power Source)

    Cod. 006.0001.1960 Discovery 172T 03/05/2019 V.2.2 ENGLISH WELD THE WORLD SET-UP (INITIAL SET-UP OF THE WELDING POWER SOURCE) L10 L11 SETTING L26 L27 L29 L28 ACTIVATION/ EXIT SELECTION ○ Set the welding power source ON/OFF switch to “O” to switch the unit off.
  • Page 15 Cod. 006.0001.1960 Discovery 172T 03/05/2019 V.2.2 ENGLISH WELD THE WORLD - St.C. [STARTING CURRENT] ○ The value of this parameter can be set as a percentage of the welding current or as an absolute value expressed in Amperes. F.Cu. [FINAL CURRENT] ○...
  • Page 16: Alarm Management

    Cod. 006.0001.1960 Discovery 172T 03/05/2019 V.2.2 ENGLISH WELD THE WORLD ALARM MANAGEMENT This LED illuminates if an incorrect operating condition occurs. An alarm message will appear on display D1. Tab. 2 - Alarm messages MESSAGE MEANING EVENT CHECKS • Make sure that the power re-...
  • Page 17: Mma Welding

    Cod. 006.0001.1960 Discovery 172T 03/05/2019 V.2.2 ENGLISH WELD THE WORLD MMA WELDING 8.1 MMA WELDING - FIRST LEVEL MENU L10 L11 SETTING L26 L27 L29 L28 ACTIVATION SELECTION ○ Press the S6 button to activate the MMA mode. ○ Press the S3 button.
  • Page 18 Cod. 006.0001.1960 Discovery 172T 03/05/2019 V.2.2 ENGLISH WELD THE WORLD Tab. 3 - Parameters of 1st level menu: mode ACRONYM / LED SETTING DEFAULT NOTES WELDING CURRENT 10 A 80 A 180 A MAXIMUM CURRENT WITH REMOTE CONTROL Ho.S. HOT-START...
  • Page 19: Mma Welding - Second Level Menu

    Cod. 006.0001.1960 Discovery 172T 03/05/2019 V.2.2 ENGLISH WELD THE WORLD 8.2 MMA WELDING - SECOND LEVEL MENU L10 L11 SETTING L26 L27 L29 L28 3 sec ACTIVA- TION/SELECTION ○ Hold down the S2 button for 3 seconds to access the 2nd level menu.
  • Page 20 Cod. 006.0001.1960 Discovery 172T 03/05/2019 V.2.2 ENGLISH WELD THE WORLD The activation is suitable for the following welding modes: • MMA • DC TIG Compatible remote control types: • manual remote control. *4: The activation is suitable for the following welding modes: •...
  • Page 21: Mma Welding - Special Functions

    Cod. 006.0001.1960 Discovery 172T 03/05/2019 V.2.2 ENGLISH WELD THE WORLD 8.3 MMA WELDING - SPECIAL FUNCTIONS L10 L11 SETTING L26 L27 L29 L28 ACTIVATION ○ Press the S2 button to scroll the list of settings to edit. The value associated with the selected setting appears on display D1.
  • Page 22: Dc Tig Welding

    Cod. 006.0001.1960 Discovery 172T 03/05/2019 V.2.2 ENGLISH WELD THE WORLD DC TIG WELDING 9.1 DC TIG WELDING - FIRST LEVEL MENU L10 L11 SETTING L26 L27 L29 L28 SELECTION SELECTION ACTIVATION ○ Press the S6 button to activate the TIG mode.
  • Page 23 Cod. 006.0001.1960 Discovery 172T 03/05/2019 V.2.2 ENGLISH WELD THE WORLD ○ Press the S3 button to scroll the list of settings to edit. The value associated with the selected setting appears on display D1. In this diagram the LED relative to the setting to be edited illuminates.
  • Page 24 Cod. 006.0001.1960 Discovery 172T 03/05/2019 V.2.2 ENGLISH WELD THE WORLD ACRONYM / LED SETTING DEFAULT MAX USEFUL ADVICE WELDING CURRENT MAXIMUM CURRENT WITH RE- 80 A 170 A MOTE CONTROLLER SECOND CURRENT B-LEVEL 10 % 50 % 200 % 40 %...
  • Page 25 Cod. 006.0001.1960 Discovery 172T 03/05/2019 V.2.2 ENGLISH WELD THE WORLD present: MULTI TACK = ON The usefulness of having an adjustable initial welding current is that of avoiding welding the part with excessively high current values and thus potentially damaging it.
  • Page 26 Cod. 006.0001.1960 Discovery 172T 03/05/2019 V.2.2 ENGLISH WELD THE WORLD • Reduction of heat-affected zone. - BASE TIME ○ Time during which current output is at the base value. Available with settings for SET UP, PULSED TYPE = SLOW, the adjustment is expressed in seconds.
  • Page 27: Tig Dc Welding - Second Level Menu

    Cod. 006.0001.1960 Discovery 172T 03/05/2019 V.2.2 ENGLISH WELD THE WORLD 9.2 TIG DC WELDING - SECOND LEVEL MENU L10 L11 SETTING L26 L27 L29 L28 3 sec ACTIVATION/ SELECTION ○ Hold down the S3 button for 3 seconds to access the 2nd level menu.
  • Page 28 Cod. 006.0001.1960 Discovery 172T 03/05/2019 V.2.2 ENGLISH WELD THE WORLD The maximum and minimum TIG welding current values can be set with the foot pedal control. The up and down slopes cannot be controlled via the foot pedal. The following welding procedures can be selected with the foot pedal:...
  • Page 29 Cod. 006.0001.1960 Discovery 172T 03/05/2019 V.2.2 ENGLISH WELD THE WORLD electric arc. It is advisable to use LIFT-ARC priming in applications such as maintenance of machinery in operation, welding close to printed circuits or soldering near computers. PROCESS FOR ARC IGNITION IN LIFT-ARC MODE:...
  • Page 30: Tig Dc Welding - Special Functions Menu

    Cod. 006.0001.1960 Discovery 172T 03/05/2019 V.2.2 ENGLISH WELD THE WORLD 9.3 TIG DC WELDING - SPECIAL FUNCTIONS MENU L10 L11 SETTING L26 L27 L29 L28 ACTIVATION/SE- LECTION ○ Press the S2 button to scroll the list of settings to edit.
  • Page 31 Cod. 006.0001.1960 Discovery 172T 03/05/2019 V.2.2 ENGLISH WELD THE WORLD Q-START ○ This parameter allows the unit to start in synergic pulsed TIG mode for the preset time interval, before switching automatically to the welding procedure selected on the interface panel. The pa- rameter creates the weld pool more quickly than a standard starting time of the material because it creates a movement of the two flaps up to speed up the join.
  • Page 32 Cod. 006.0001.1960 Discovery 172T 03/05/2019 V.2.2 ENGLISH WELD THE WORLD Tab. 13 - Recommended DYNAMIC ARC parameters ANY TYPE OF JOINT Sheet thickness (mm) Current (A) DynArc Value (Amperes) 1,0 mm 35 A - 50 A 5 - 10 2,0 mm...
  • Page 33 Cod. 006.0001.1960 Discovery 172T 03/05/2019 V.2.2 ENGLISH WELD THE WORLD Tab. 14 - Recommended MULTITACK parameters CORNER/BUTT JOINT Sheet thickness (mm) Current (A) Multitack FREQUENCY (Hz) 0.6 mm 40 A - 60 A 1.0 - 1.5 0.8 mm 60 A - 80 A 1.0 - 1.5...
  • Page 34: Torch Trigger Procedure

    Cod. 006.0001.1960 Discovery 172T 03/05/2019 V.2.2 ENGLISH WELD THE WORLD 10 TORCH TRIGGER PROCEDURE L10 L11 L26 L27 L29 L28 SELECTION ○ Press the S5 button to select the desired PULSED TORCH mode. 2 STROKE 4 STROKE 4 STROKE B-LEVEL 2 STROKE SPOT Depending on the welding mode selected, specific torch procedures are available.
  • Page 35 Cod. 006.0001.1960 Discovery 172T 03/05/2019 V.2.2 ENGLISH WELD THE WORLD Tab. 16 - Pulsed Torch trigger mode table. → PROCEDURE ↓ MODE 2T HF 4T HF 4T B-L 4T B-L HF 2T Q-SPOT 2T Q-SPOT HF AD GOUGING ELECTRODE √...
  • Page 36 Cod. 006.0001.1960 Discovery 172T 03/05/2019 V.2.2 ENGLISH WELD THE WORLD - 2 STROKE + HF ○ Bring the torch up to the work until the electrode tip is approximately 2 or 3 mm away. ○ Press (1T) and keep the torch trigger pressed.
  • Page 37 Cod. 006.0001.1960 Discovery 172T 03/05/2019 V.2.2 ENGLISH WELD THE WORLD 4th STROKE 1st STROKE 2nd STROKE 3rd STROKE WELDING CURRENT FINAL CURRENT C.C. STARTING CURRENT CURRENT DOWN POST GAS ARC STRIKE LIFT SLOPE SLOPE - 4 STROKE + HF ○ Bring the torch up to the work until the electrode tip is approximately 2 or 3 mm away.
  • Page 38 Cod. 006.0001.1960 Discovery 172T 03/05/2019 V.2.2 ENGLISH WELD THE WORLD ○ Slowly lift the torch to strike the arc. ○ The arc strikes, the welding current assumes the pilot current value. (if activated from the SET UP menu.) ○ Release (2T) torch trigger.
  • Page 39 Cod. 006.0001.1960 Discovery 172T 03/05/2019 V.2.2 ENGLISH WELD THE WORLD PRESS AND RELEASE 1st STROKE 2nd STROKE 3rd STROKE 4th STROKE MAIN CURRENT FINAL SECOND CURRENT CURRENT STARTING CURRENT DOWN POST GAS PRE-GAS SLOPE SLOPE ARC STRIKE...
  • Page 40: Stroke Spot - Q-Spot Function

    Cod. 006.0001.1960 Discovery 172T 03/05/2019 V.2.2 ENGLISH WELD THE WORLD 10.1 2 STROKE SPOT - Q-SPOT FUNCTION L10 L11 SP.t. SETTING L26 L27 L29 L28 3 sec ACTIVATION/ ACTIVATION SELECTION ○ Press the S5 button to select the TORCH 2 STROKE SPOT BUTTON mode.
  • Page 41 Cod. 006.0001.1960 Discovery 172T 03/05/2019 V.2.2 ENGLISH WELD THE WORLD pipes. Place the torch with the electrode on the precise point to be fixed. • Press the torch trigger and then lift. • After lifting the torch, a precise trigger will follow.
  • Page 42 Cod. 006.0001.1960 Discovery 172T 03/05/2019 V.2.2 ENGLISH WELD THE WORLD - 2 STROKE SPOT HF: ○ Bring the torch up to the work until the electrode tip is approximately 2 or 3 mm away. ○ Press (1T) torch trigger. ○ The arc strikes without contact with the workpiece and the voltage discharges (HF) cease auto- matically.
  • Page 43 Cod. 006.0001.1960 Discovery 172T 03/05/2019 V.2.2 ENGLISH WELD THE WORLD 1. Position the torch 2. Press the torch Lift torch 4. The arc ignites for 5. The result of this with the electrode on trigger and keep it slightly. a few hundredths of is a very precise, the workpiece.
  • Page 44 Cod. 006.0001.1960 Discovery 172T 03/05/2019 V.2.2 ENGLISH WELD THE WORLD Tab. 18 - Table showing enabled Welding Parameters MODE → MENU PROCEDURE ↓ → PARAMETER ↓ WELDING CURRENT 1° (MMA) MAXIMUM RC CURRENT IN MMA MODE 1° HOT START √...
  • Page 45: Jobs Management

    Cod. 006.0001.1960 Discovery 172T 03/05/2019 V.2.2 ENGLISH WELD THE WORLD 11 JOBS MANAGEMENT Personalised welding settings, or JOBs, can be saved in memory locations and subsequently uploaded. Up to 50 JOBS can be saved (j01-j50). JOBs can be managed only when the unit is not in welding mode.
  • Page 46: Deleting A Job

    Cod. 006.0001.1960 Discovery 172T 03/05/2019 V.2.2 ENGLISH WELD THE WORLD 11.2 DELETING A JOB L10 L11 SELECTION L26 L27 L29 L28 3sec ACTIVATION CONFIRMATION DELETION ○ Hold down the S4 button for 3 seconds to gain access to the JOB SAVE/DELETE menu.
  • Page 47: Loading A Job

    Cod. 006.0001.1960 Discovery 172T 03/05/2019 V.2.2 ENGLISH WELD THE WORLD 11.3 LOADING A JOB L10 L11 SELECTION L26 L27 L29 L28 ACTIVATION CONFIRMATION ○ Press and release the S4 button to activate the LOAD JOB menu. L.xx : Only after loading the job, the message will appear on display D1.
  • Page 48: Technical Data

    Conformity markings compliant with WEEE directive Equipment compliant with RoHS directive 12.1 DISCOVERY 172T Supply voltage 1 x 230 Va.c. ± 15 % / 50-60 Hz Mains protection 16 A Delayed...
  • Page 49 Cod. 006.0001.1960 Discovery 172T 03/05/2019 V.2.2 ENGLISH WELD THE WORLD 40% (40° C) 13.2 A 50% (40° C) 20.4 A Actual input current 60% (40° C) 17.3 A 13.6 A 100 % (40° C) 20.4 A 14.6 A No-load voltage (U0)
  • Page 50: Wiring Diagram

    Cod. 006.0001.1960 Discovery 172T 03/05/2019 V.2.2 ENGLISH WELD THE WORLD 13 WIRING DIAGRAM...
  • Page 51: Torch Connector (Front Panel)

    021.0004.3360 P. T. P. T. P. T. P. T. Cod. 006.0001.1960 N.C. Discovery 172T 03/05/2019 V.2.2 N.C. DOWN ENGLISH WELD THE WORLD N.C. N.C. 021.0004.0602 TORCH CONNECTOR 13.1 TORCH CONNECTOR (front panel) 021.0004.3360 P. T. REMOTE CONNECTOR code 021.0004.3360 TORCH CONNECTOR...
  • Page 52: Spares

    Cod. 006.0001.1960 Discovery 172T 03/05/2019 V.2.2 ENGLISH WELD THE WORLD 14 SPARES 14.1 DISCOVERY 172T...
  • Page 53 Cod. 006.0001.1960 Discovery 172T 03/05/2019 V.2.2 ENGLISH WELD THE WORLD CODE DESCRIPTION 011.0003.0051 LOWER COVER 010.0006.0048 REAR PLASTIC PANEL 010.0006.0043 FRONT PLASTIC 021.0001.0260 FIXED SOCKET 400 A 011.0003.0101 FANS SUPPORT 050.0002.0153 TORCH CONNECTOR BOARD 016.5001.1132 HOSE ADAPTER 016.5001.1303 RINGNUT 003.0002.0002 012.0001.0007...
  • Page 54: Torch Connectors Complete Kit

    Cod. 006.0001.1960 Discovery 172T 03/05/2019 V.2.2 ENGLISH WELD THE WORLD 14.2 TORCH CONNECTORS COMPLETE KIT CODE DESCRIPTION 021.0000.0001 TORCH CONNECTORS COMPLETE KIT 016.5001.0822 SLEEVE HOSE ADAPTOR 1/4 016.0007.0001 HOSE CLAMPS Ø=11-13 016.0007.0709 HOSE CLAMP Ø=07-09 016.5001.0821 SLEEVE HOSE ADAPTER FOR RUBBER HOSE M10 021.0004.3360...
  • Page 55 Cod. 006.0001.1960 Discovery 172T 03/05/2019 V.2.2 ENGLISH WELD THE WORLD...
  • Page 56 WECO srl Via S. Antonio 22 - Loc. Belvedere 36056 Tezze sul Brenta (Vicenza) - Italy Tel +39 0424 561 943 - fax +39 0424 561 944 www.weco.it Cod. 006.0001.1960 03/05/2019 V.2.3...

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