Atlas Copco MT Focus 400

The MT Focus 400 is a control and drive unit designed for ultra low-torque screw fastening applications, specifically within the MicroTorque system. It serves as the central controller for tightening parameters and provides essential feedback during operation.

Function Description

The primary function of the MT Focus 400 is to control and monitor screw fastening processes. It allows users to set and manage tightening parameters, including torque and angle, and provides real-time feedback on the tightening process. The unit supports various accessories and offers configurable digital inputs and outputs for integration into automated systems.

The controller stores PSets (program sets) that define specific tightening sequences and parameters. These PSets can be configured using ToolsTalk MT software or through the Auto-set function on the device itself. When a tool is connected, the controller assigns PSets to the tool type, ensuring compatibility and proper operation.

Key functions include:

Tightening Control: Manages and executes tightening operations based on predefined PSets, including torque and angle control.
Batch Control: Allows for setting, incrementing, decrementing, and resetting batch numbers for multiple tightenings.
Auto-start: Provides an automatic start function for tightening operations, which can be enabled or disabled.
System Monitoring: Displays real-time information such as torque, angle, and system status (OK, Batch finished, Error).
Error Reporting: Provides detailed messages on the display for various operational issues, such as "Angle exceeded," "Torque not reached," or "Bit slip detected."
Connectivity: Offers multiple ports for connecting to PCs, power supplies, vacuum pumps, tools, and various digital I/O accessories.
Software Update: Supports software updates for the controller.

Important Technical Specifications

Ordering No: 8432085000
Power: 240 W
Internal 24 V Supply: Max 700 mA load for connected accessories.
Serial Interface (RS232-C):
- 3-pole socket connector (Binder 719 Series pin plug).
- COM port settings: 115200 Baud, 8 Data bits, 1 Stop bit, No parity, No handshake.
- Signals: TxD (Transmitted data), GND (Data ground), RxD (Received data).
Vacuum Pump Output (VP):
- 5-pole socket connector (Binder 719 Series pin plug).
- Output: +24 V (Internal +24 V), Pump on (Digital output), GND (Internal 0 V).
- Supports Atlas Copco Vacuum pump VPX6 (24 V, 600 mA).
Configurable Single Input (I/O):
- 5-pole pin connector (Binder 719 Series socket plug).
- Input resistance: 10 kΩ.
- Output: +24 V (Internal +24 V), GND (0 V output).
- Digital input for functions like "Start tightening."
- Not opto-isolated.
- Signal duration for tool reset: >40 ms.
Configurable Digital Inputs and Outputs (DIGITAL I/O):
- 15-pole D-sub socket connector (15-pole D-sub pin plug).
- Voltage range: 11-30 VDC.
- Input resistance: >5 kΩ.
- Output resistance: 23-35 Ω.
- Output current protection: 120 mA max. peak/continuous current, over current protected.
- Input response time: <25 ms (with de-bouncing filter).
- Output response time: <5 ms.
- All inputs are opto-isolated.
- Interface connection can be in PNP mode (source type, positive logic) or NPN mode (sink type, negative logic).
- Outputs include: EXT-OUT0 (Busy), EXT-OUT1 (Tightening OK), EXT-OUT2 (Tightening NOK), EXT-OUT3 (Batch OK).
- Inputs include: EXT-IN0 (Start tightening), EXT-IN1 (Reset tool), EXT-IN2 (Start loosening), EXT-IN3 (Reset batch).
Built-in Battery: Powers functions like the clock for 100 days when not recharged; charging time is 5 hours.

Usage Features

User Interface: Features a display and three buttons (UP, DOWN, OK) for navigation and parameter setting.
Intuitive Operation: Press and hold the OK button to power on. The system initializes, checking basic functions.
PSet Management: Allows selection of predefined PSets for different tightening tasks.
Auto-set Functionality: Simplifies setup by guiding the user through setting tightening torque, speed, and angle limits based on three sample tightenings.
Status Indicator: A multi-color LED (Green for Tightening OK, Blue for Batch finished, Red for Error) provides quick visual feedback on the operation status.
Temporary Auto-start Disable: A non-magnetic object can be placed in a designated hole on the front panel to temporarily disable the Auto-start function.
Mounting Options: Can be used standing on a workbench, or attached to a vertical surface using a wall bracket or rear screw attachment.
Ergonomic Guidelines: The manual provides comprehensive ergonomic advice for workstation setup, tool handling, and minimizing exposure to reaction forces and vibrations.

Maintenance Features

Service Recommendations: Preventive maintenance is recommended at regular intervals, with general guidelines to replace defective or worn parts.
ESD Protection: Components are sensitive to electrostatic discharge; service and maintenance must be performed in an ESD-approved work environment (e.g., with an ESD carpet and wrist strap).
Cleaning: Regular cleaning of the tool and controller is recommended using non-aggressive cleansers.
Cable Management: Instructions emphasize ensuring cables are not bent excessively (min. radius 55 mm) and replacing worn cables immediately.
Service Reminder: A built-in service reminder can be configured in ToolsTalk MT to notify users when maintenance is due.
Calibration: Calibration and preventive maintenance are recommended annually or after a maximum of 1,000,000 tightenings, whichever comes first.
Component Replacement: Detailed instructions are provided for opening the cover, changing the front panel, and replacing the display, including necessary tools (Screwdriver T8, small flat-bladed screwdriver).
Software Updates: The controller's software can be updated, with reference to a dedicated user guide for the procedure.
Warranty: Product warranty is 12 months after first use (max 13 months after delivery), covering defects but not normal wear and tear or damage from inadequate maintenance or unauthorized repairs. Warranty repairs are only performed by Atlas Copco workshops or Certified Service Partners.