: Changing 1860 can change the Z-axis home position, directly impacting automatic tool changes (M6).
In the world of CNC machining, precision is non-negotiable. For operators and maintenance technicians working with FANUC-controlled lathes, milling machines, and multi-axis turning centers, understanding the machine’s parameters is essential. Among the thousands of parameters hidden in FANUC’s memory, stands out as one of the most mission-critical—yet frequently misunderstood—settings.
Correction Value=0.152 mm0.001 mm=152 unitsCorrection Value equals the fraction with numerator 0.152 mm and denominator 0.001 mm end-fraction equals 152 units fanuc parameter 1860 work
NOTE. 1 For ease of explanation, the models may be. classified as follows: T series: 16i-TB/160i-TB/160is-TB/18i-TB/180i-TB/180is- FANUC? M6 toolchange position. | Practical Machinist
If your machine has the Two-Stage Backlash Acceleration option (often an option that must be purchased and enabled by the machine tool builder or FANUC), then Parameter 1860 will likely function as the first-stage acceleration value. You can confirm this by checking the relevant bit parameters: : Changing 1860 can change the Z-axis home
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When a machine is equipped with absolute encoders, it does not need to be homed every time it is powered on because the CNC "remembers" the current position by reading the value stored in this parameter. Core Function and Mechanics Among the thousands of parameters hidden in FANUC’s
Understanding how FANUC parameter 1860 works is essential for machine builders, maintenance technicians, and CNC engineers. Improper configuration can paralyze an axis, trigger immediate servo alarms, or result in severe machine collisions. Technical Overview of Parameter 1860
: If the encoder battery dies or the encoder is disconnected, the system loses the synchronization between the mechanical position and Parameter 1860. This triggers a 300 APC Alarm , requiring you to re-set the reference position. Setting or Resetting Procedure
Toggling the parameter to 0 forces the control to "forget" the corrupted position data. Now you must turn it back on. Return to Parameter 1860 using the steps above. Change the bit value back from to 1 .
Parameter 2022 sets the direction of the motor's rotation relative to the velocity command. It is typically set to 111 or -111 depending on the phase wiring of the motor.