This is not an error, but a reminder. Set PWE back to 0.
Officially known as the (or sometimes referred to as the linear acceleration time constant for each axis), Parameter 1860 directly controls how aggressively your machine’s axes accelerate during a cutting feed move. Getting this value wrong can lead to servo lag alarms, poor corner finishes, or even mechanical damage.
Fanuc (often referred to as P1860 ) is a critical setting used to define the Position Deviation Limit (Position Error) during a stop or at rest . It essentially sets the "allowable window" for how far an axis can drift from its commanded position before the CNC triggers a Servo Alarm (typically SV0410) . 1. Purpose of Parameter 1860 fanuc parameter 1860 full
: The value is established after an axis is successfully zeroed using Parameter 1815.4 (APZ)
2. Full-Closed Loop Systems (Linear Scales / External Encoders) This is not an error, but a reminder
This article provides a full technical breakdown of Parameter 1860—its function, its relationship with other parameters, how to calculate it, common troubleshooting scenarios, and best practices for optimization.
When you adjust Parameter 1860, you are not moving the physical limit dog. You are electronically shifting where the control the grid point is. Getting this value wrong can lead to servo
If you are getting a Stop Excess Error and your Parameter 1860 is set to a standard value, the problem is likely mechanical or electrical, not the parameter itself:
, then counter capacity = 4000 pulses. The CNC will think one motor rev = 4000 pulses, causing the reference point to occur twice per physical motor revolution → unstable grid.
Your Fanuc servo system operates on a "Grid" generated by the position feedback device (pulse coder, absolute encoder, or scale). As the motor rotates, the encoder sends pulses. The control identifies a specific pulse as the "Grid Point" – a reproducible position for machine zero.
The requested software / document is no longer marketed by Saia-Burgess Controls AG and without technical support. It is an older software version which can be operated only on certain now no longer commercially available products.