MASSO Documentation

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Tool Setter

The MASSO Tool Setter is used to measure tool length during the tool change process.

It provides a reference surface so MASSO can automatically compensate for differences in tool length between tools.

A switch-based tool setter is commonly used. A touch plate style tool setter requires the spindle and tool to be grounded, which is not practical for automatic tool measurement.

If grounding is not present, the tool may crash into the tool setter. A switch-based tool setter avoids this issue because it does not rely on grounding.

Wiring Example of a Touch Plate Style Tool Setter

This circuit uses a simple touch plate where the plate and cutter complete the circuit when they make contact.

A pull-up resistor is used to pull the input HIGH
The input must be inverted so it reads LOW when the tool setter is not triggered

The pull-up resistor should be at least 1/8 watt.

The input can be inverted by selecting it and pressing the spacebar.

The resistor and positive power supply must not be omitted, or the tool setter will not operate.

The resistor must not be replaced with a direct connection to the power supply, as this will cause a short circuit when the tool touches the plate.

Wiring Example of a Tool Setter with Built-In Switch

A switch-based tool setter uses a mechanical contact to detect tool contact.

INFORMATION: A tool setter using a normally closed (NC) contact is fail-safe and does not require an over-travel switch. If the circuit is open due to a fault or broken wire, MASSO will detect this and prevent probing. A tool setter using a normally open (NO) contact is not recommended because the normal and fault states appear the same.

Invert the input as required so it shows:

LOW when inactive
HIGH when triggered

Tool setters with a second switch for over-travel protection can be connected to Cycle Stop or wired into the E-Stop circuit. This will stop the probing cycle if the primary switch fails.

Some tool setters include active components such as LEDs or inductive sensors. Refer to the manufacturer’s manual for correct wiring instructions.

Additional wiring diagrams are available in the MASSO Forum.

Assigning the Tool Setter Input

After wiring the tool setter:

Go to the F1 Setup screen
Assign the selected input as Tool Setter

CAUTION: The input must show LOW when the tool setter is not triggered and HIGH only when activated.

INFORMATION: Input signals can be inverted by selecting the input in the INPUTS list and pressing the spacebar. These settings are automatically saved.