Description
Details
Tool Setter with Integrated Air Cleaner Nozzle
Compact, Reliable & CNC-Ready
The Tool Setter with Air Cleaner Nozzle is a precision instrument designed for automatic tool length measurement and zero-point calibration in CNC machines. Equipped with a built-in air nozzle for chip and dust removal, it ensures accurate probe triggering and long-term reliability in demanding environments.
Key Features:
- 4-Wire NC Configuration:
Compatible with most CNC controllers, featuring two independent probe outputs (Input + and Probe) and corresponding GND connections. - Precision Contact Triggering:
When the tool touches the probe surface, the contact pair inside the device opens—immediately sending a signal to slow or stop the spindle, enabling automatic Z-axis calibration. - Integrated Air Blow Nozzle:
Actively removes chips, dust, and coolant from the probe surface, guaranteeing clean and accurate contact every cycle. - Durable & Sealed Construction:
Built for industrial use, with robust housing and internal spring mechanism to support long operational life. - Easy CNC Integration:
Can be connected to any free digital input of your CNC controller (Input*, Probe) with φ4 air inlet.
Application:
Ideal for CNC routers, milling machines, and engraving systems requiring automated and repeatable tool calibration. The air cleaner nozzle enhances performance in dusty or high-speed environments.
Wiring and Signals Description
The MY20-20-2 CNC Automatic Tool Setter is a precision NC (Normally Closed) probe designed for automatic tool length measurement and Z-axis zero setting on CNC milling machines. It offers dual signal output for both tool contact detection and mechanical overtravel protection, ensuring both precision and safety in CNC operations. Dual-Signal Wiring – 4-Wire Normally Closed Configuration. This tool setter is equipped with two independent signal pairs, both using NC-type contact switches:
Tool Setting Signal (Brown + Orange)
Purpose: Used for precise Z-axis zeroing during tool setup.
Working Principle:
- In normal (idle) state, the contacts are closed, and voltage is present at the output.
- When the tool touches the probe tip, the contact pair opens, cutting the signal.
- The CNC controller detects this voltage drop (0V) and immediately slows or stops the Z-axis movement.
- After tool retraction, the contact pair closes again, restoring the signal.
✅ This is the primary signal used for automatic tool length setting and surface detection.
Overtravel Protection Signal (Green + Blue)
Purpose: Acts as a secondary safety signal to detect excessive downward pressure or mechanical failure.
Working Principle:
- Also NC by default.
- In case the tool does not stop after contact (e.g. software delay, error), and continues pressing the probe:
- A separate contact pair inside the probe opens.
- This triggers the Overtravel Protection Signal, allowing the controller to take immediate emergency action (halt the machine, raise alarm).
- Prevents physical damage to both the tool and the probe assembly.
✅ This is a redundant safety mechanism, highly recommended in industrial and automatic CNC systems.
| Wire Color | Color | Function | Signal Type | Signal |
| Brown | Tool Setting Signal (+) | Normally Closed | Tool Setting Signal | |
| Orange | Tool Setting Signal (–) | Normally Closed | ||
| Green | Overtravel Protection Signal (+) | Normally Closed | Overtravel Protection Signal | |
| Blue | Overtravel Protection Signal (–) | Normally Closed | ||
 | ||||
| All product data (pictures, dimensions, tables, drawings) are provided as received from the supplier; we exclude liability for their accuracy or completeness. | ||||
🔌 Connection to CNC Controller
Connect as follows:
- Tool Setting Signal → Any available INPUT pin on your controller (Brown = IN+, Orange = IN–)
- Overtravel Signal → Emergency input or secondary input (Green = IN+, Blue = IN–)
- No external power is required – the device functions as a passive contact switch.
Note: Signal polarity depends on controller logic. Some systems may require pull-up or pull-down resistor configuration.
Models and Functions
Tool-Setter-MY20-20-2 – Standard NC Tool Setter (Without Air Nozzle)
Description:
The Tool-Setter-MY20-20-2 Standard is a precision-engineered Normally Closed (NC) tool setter for automatic tool length measurement and Z-zero detection on CNC machines. Designed for clean environments, it provides reliable signal output without the need for active cleaning. The base features an integrated magnet for temporary mounting without screws, allowing quick repositioning or testing.
Technical Specifications:
- Contact Type: Normally Closed (NC)
- Signal Output: Tool Setting + Overtravel Protection (dual-channel)
- Repeatability: ±0.001 mm
- Stroke: 2.5–5 mm
- Contact Force: ~1.5 N
- Tip Material: Polished Carbide Alloy, Ø20 mm
- Housing: Anodized Aluminum
- Mounting: Magnetic base + flange (M4 screw holes)
- Protection Level: IP65
- Voltage: 24V DC (dry contact – no power required)
- Current: Max. 20 mA
- Cable Length: 180 cm (shielded, 4-core)
- Cable Protector Length: 100 cm (metal spring sleeve)
- Use Case: Ideal for enclosed or clean CNC setups without heavy coolant or chips
- SKU Number: 1240001
Tool-Setter-Air-MY20-20-2 – Tool Setter (With Air Nozzle)
Description:
The Tool-Setter-Air-MY20-20-2 builds upon the standard model by integrating a compressed air nozzle designed to automatically clean the probe surface before each tool-touch. This feature minimizes measurement errors caused by coolant, dust, or chip buildup. It includes a 4mm air hose inlet and a magnetic base for temporary tool-free mounting.
Technical Specifications:
- Contact Type: Normally Closed (NC)
- Signal Output: Tool Setting + Overtravel Protection (dual-channel)
- Repeatability: ±0.001 mm
- Stroke: 2.5–5 mm
- Contact Force: ~1.5 N
- Tip Material: Polished Carbide Alloy, Ø20 mm
- Housing: Anodized Aluminum
- Mounting: Magnetic base + flange (M4 screw holes)
- Integrated Cleaning: Air nozzle with 4 mm hose inlet (M5 thread)
- Protection Level: IP65
- Voltage: 24V DC (dry contact – no power required)
- Current: Max. 20 mA
- Cable Length: 180 cm (shielded, 4-core)
- Cable Protector Length: 100 cm (metal spring sleeve)
- Use Case: Perfect for dusty, wet, or high-speed machining environments with coolant or chips
- SKU Number: 1240002
Dimensions
