To change 1860, you must be in MDI mode with "Parameter Write Enable" (PWE) set to 1. Step-by-Step Adjustment Guide
: When setting or resetting a machine's home (reference) position, this value is often established as part of the APZ (Absolute Position Zero) calibration process. Related Parameters
Installing a new servo motor requires re-establishing the relationship between the physical axis and the CNC's internal logic.
: Controls backlash compensation for the axes. How to Modify (If Required) fanuc parameter 1860
In most modern FANUC applications, this parameter is used to declare whether the axis uses a or an Absolute Pulse Coder (APC) . Bit-Level Breakdown
[Physical Reference Position] <--> [Calculated Offset: Parameter 1860] <--> [Raw Encoder Pulsecoder Counter] Why Manual Modification is Discouraged
This bit tells the system if the reference position (zero point) has been established. When you set the home position manually, the system updates Parameter 1860 with the current coordinate and then automatically flips the APZ bit to "1" to confirm the zero point is set. en.industryarena.com When to Modify or Check Parameter 1860 Losing Home Position: To change 1860, you must be in MDI
Parameter 1860 is a bit-type parameter, meaning it contains an 8-digit binary code (zeros and ones) for each axis on the machine. The primary bit you need to look at is :
After changing 1860, you must perform a new Zero Return (Reference Point) to re-establish the machine's physical home.
Move the cursor to and change it from 0 to 1 . : Controls backlash compensation for the axes
Parameter 1860 represents the relative to the machine's reference position.
Parameter 1860 is stored in the CNC’s non-volatile SRAM. If the battery backup fails, you will lose it. Always keep a printed or digital backup of all parameters.
Look at the row corresponding to the axis you need to modify (X, Y, Z, etc.).
Note: If you replace the battery while the CNC is powered , you will keep your position data. If you replace it while the CNC is OFF , you will lose the position data, forcing you to re-calibrate using parameters 1860 and 1815. 3. Alarm 309 (APC Alarm: DVD Turn)
The control is trying to communicate with the encoder type specified in Parameter 1860, but the data packet returning from the encoder is corrupted, missing, or mismatched. Check the feedback cable connections.