Fanuc Parameter 1860 Work -

This parameter is critical for protecting tools and parts during:

Parameter 1860 controls the Feed per Revolution (FPR) Override limit.

When your G-code program commands a feed rate based on spindle revolutions (e.g., G99 G01 Z-50.0 F0.2), the operator can adjust this feed rate using the Override knob on the control panel (usually 0%, 10%, ..., 150%, 200%).

Parameter 1860 sets the maximum percentage of override the operator can select. Any override selection higher than this parameter’s value will be ignored or clamped to this maximum. fanuc parameter 1860 work

To truly understand how Parameter 1860 works, you need to look at three key areas:

In the realm of Computer Numerical Control (CNC) machining, the precision of axis movement is paramount. FANUC controls, renowned for their robustness, rely on a complex architecture of parameters to define machine behavior. Among these, Parameter 1860 stands as a cornerstone for the accurate setup of servo motor feedback systems. This parameter is not merely a number; it is the digital "signature" that aligns the CNC’s electronic commands with the physical reality of the motor’s rotation.

Not all. Older FANUC 6M or 0M controls (pre-1990) use different parameters. On newer i-series Beta or Alpha drives, parameter numbering may vary. Always consult your machine builder’s manual first. That said, for most FANUC controls from the 15i onward, 1860 is standard. This parameter is critical for protecting tools and

For machines running rigid tapping above 6000 RPM, the role of Parameter 1860 becomes even more critical. At high rotational speeds, even a 1-encoder-pulse error translates into significant angular mismatch during the reversal at hole bottom.

FANUC’s high-speed rigid tapping algorithm actually pre-reads Parameter 1860 during block look-ahead. It calculates the exact current angle needed for the reversal point, factoring in both encoder feedback and this fine offset. This is why incorrect 1860 values cause tap breakage at high speed but only minor thread degradation at lower speeds.

Important: Always back up all CNC parameters before making changes. Use a memory card or RS-232 to save your current backup. This operation requires access level 3 (maintenance) or higher. For machines running rigid tapping above 6000 RPM,

Formally, FANUC Parameter 1860 defines the number of pulses per revolution (feedback pulses) for the separate position coder mounted on a servo motor. In older or specific high-precision applications, particularly those involving α (Alpha) series servo motors, the motor often uses a separate pulse coder (distinct from the built-in sensor) to report its position back to the CNC. Parameter 1860 tells the control exactly how many electrical pulses this external coder generates during one complete turn of the motor shaft.

While many modern FANUC configurations rely on built-in serial encoders (managed by other parameters like 1820), Parameter 1860 remains essential for: