A smaller 1860 value means faster acceleration/deceleration (sharper moves). A larger value means gentler, slower ramping.
If you see a : Decrease the value in parameter 1860 by 5-10%.
When you adjust Parameter 1860, you are not moving the physical limit dog. You are electronically shifting where the control the grid point is.
: When a grid shift or homing operation is initiated (using the APZ bit in Parameter 1815), the CNC system reads the exact physical location of the motor's rotor relative to the scale or grid marker. fanuc parameter 1860 full
Cut a circle (e.g., 100mm diameter) at a moderate feed rate (e.g., 1000mm/min) to check for quadrant protrusions.
Do not use Parameter 1860 to compensate for a worn ballscrew or loose coupling. Fix the mechanical problem first.
A "full" shift in one direction would be entering 99999999 , which would shift zero approximately 99,999 mm (99 meters) – obviously not practical. The practical full range is limited by your machine's physical travel. Never exceed the hard limit switches. When you adjust Parameter 1860, you are not
is defined as the Reference Position Shift Value on the Z-axis (or the axis to which it is assigned). In many standard Fanuc configurations (especially on lathes and machining centers with absolute encoders), Parameter 1860 holds the distance (in detection units) that the machine moves to find its Grid Point during a reference return operation.
Because you cannot simply "type in" a fix for Parameter 1860, resolving errors associated with it requires a structural reference position recovery routine using . Follow this methodology to cleanly update Parameter 1860 through the CNC interface: Step 1: Enable Parameter Writing (PWE) FANUC? M6 toolchange position. | Practical Machinist
One of the most perplexing experiences for a technician is finding Parameter 1860 listed in the axis parameter display but discovering that the with no mention of 1860. This has been documented on platforms like Practical Machinist, where users notice 1853, 1855, 1856, 1860, 1861, and 1865 all present but the book provides no explanation. Cut a circle (e
To truly understand how Parameter 1860 functions in the field, let us walk through a real-world scenario from CNCZone, where a user with a Fanuc 21i-TA lost their machine zero after a servo repair.
: After replacing batteries, you must typically move the axis to the physical home position and toggle Parameter 1815 (APZ) to "1" to update Parameter 1860 with the new zero-point data. How to Modify (If Required) To change axis parameters like 1860, you must first enable Parameter Write Enable (PWE) [OFFSET SETTING] PARAMETER WRITE and change the value to