Specifications

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CONCISE GUIDE FANUC 106
7.0 MACHINING WITH “AXIS C” AND MOTOR DRIVEN TOOLS
Axis C is an option used to program spindle movements intended as angle movements made with
programmable feed.
This means that the spindle no longer responds to S functions (rpm.) or M functions (direction of rotation)
but becomes an axis to all effects, programmed with address “C” (or “A” in machines fitted with back
spindle option).
Therefore, with axis C it is possible to drill holes, cut shapes (keys, eccentricities, undercutting, cams etc..)
using certain tools that are referred to as motor driven tools.
7.1 MOTOR DRIVEN TOOLS
The “axis C” option requires the use of special turrets to handle the motor driven modules.
The motor driven modules are axial or radial tool holders upon which the tools for milling, drilling holes and
tapping are mounted.
The standard motor driven tools are divided into two groups:
- Axial motor driven modules for front machining
- Radial motor driven modules used to machine on the workpiece diameter
To activate or deactivate the module rotation the following functions are used:
• M303 Clockwise rotation of motor driven module
• M304 Anti-clockwise rotation of motor driven module
• M305 Stop rotation of motor driven module
• S….. Rpm set for motor driven module
• G94 Feed set in mm/min.
The motor driven modules can be mounted in any turret position.
Function S…. corresponds to the actual rpm of the turret motor, therefore it is indispensable to know the
module transmission ratio (the modules supplied by Graziano SPA have a 1:1 ratio).
NOTE. It is important that function S…. is written in the block with the direction of rotation of the motor
driven module (M303 or M304). This block must not contain other instructions.
Example:
N17 …….
N18 M304 S2000 ; Motor driven module rpm and direction of rotation
Example of functions used for motor driven modules: