Fanuc Parameter 1860 !exclusive! -

In the world of FANUC CNC systems, Parameter 1860 is a critical setting used primarily for machines equipped with absolute position detectors. It stores the current position of each axis relative to the machine zero point, ensuring the CNC "remembers" where it is even after a power cycle. What is FANUC Parameter 1860?

Parameter 1860 is a 2-word (32-bit) axis parameter. Its primary function is to maintain the absolute position data provided by the encoder. When a machine uses an absolute encoder, it doesn't need to be "homed" or "zero-returned" every morning; instead, it reads the value stored in this parameter to determine its exact location.

Data Type: 2-word (often works in conjunction with high-order bits in nearby parameters).

Key Function: Synchronizing the mechanical position of the machine with the internal coordinate system. When Does Parameter 1860 Become Important?

You will typically need to interact with this parameter during:

Battery Replacement: If the encoder batteries die, the absolute position is lost, and Parameter 1860 may need to be reset.

Motor/Encoder Replacement: Installing a new servo motor requires re-establishing the relationship between the physical axis and the CNC's internal logic.

Mechanical Crashes: A severe impact can jump the encoder or move the physical axis, making the stored value in 1860 inaccurate. Related Alarms

If there is an issue with the absolute position data, you may encounter specific APC (Absolute Pulse Coder) alarms:

Alarm 300: Request for zero return (the system has lost its position).

Alarm 306-308: Battery-related errors indicating the absolute position data is at risk. How to Set or Reset the Absolute Position

Resetting the absolute position is a precise process that involves both Parameter 1860 and Parameter 1815. Master the Fanuc Zero Return Procedure in 5 Steps

The Critical Rule: 1860 < Rapid Speed (1420)

If 1860 is set equal to or higher than the rapid speed of that axis, the control will not decelerate properly. The axis may overshoot the dog, fail to find the marker, and trigger alarm PS0090 (Reference return incomplete) or PS0091 (Zero point not found).

How to Adjust Parameter 1860

⚠️ WARNING: Always back up your machine parameters to a memory card or USB stick before making any changes. Incorrect parameter settings can cause the machine to behave unpredictably.

Conclusion

FANUC parameter 1860 offers a flexible way to adjust feed rates on CNC machines, contributing to optimized machining processes. Understanding and effectively utilizing this parameter can lead to improved productivity, better surface finishes, and extended tool life. However, any adjustments should be made with care, and in accordance with the specific requirements of the machining task and the capabilities of the CNC machine.

In the FANUC CNC system, Parameter 1860 (often referenced as

in related contexts) is a critical axis-specific parameter used for managing Absolute Position Detectors Function Overview Parameter 1860 stores the absolute position data fanuc parameter 1860

for each axis when an absolute pulse coder is used. Its primary role is to maintain the machine's reference position (home) even after the power is turned off, eliminating the need for a manual reference point return (homing) every time the machine is restarted. Key Characteristics Axis-Specific

: This parameter is set individually for each axis (X, Y, Z, etc.).

: It typically holds a 32-bit (binary) value representing the machine coordinate position. Dependency : It works in conjunction with Parameter 1815 , specifically: 1815#4 (APZ) : Indicates if the absolute position has been established. 1815#5 (APC) : Indicates if an absolute pulse coder is being used. Common Use Cases & Maintenance Battery Replacement

: If the backup battery for the pulse coder fails, the value in Parameter 1860 may be lost or corrupted, leading to a "300 APC Alarm: Need ZRN" (Zero Return Necessary).

: When a motor or cable is replaced, the relationship between the motor's zero point and the machine's physical home may change. Technicians must manually move the axis to the physical home and reset the reference point to update Parameter 1860. Reference Point Shift

: If you need to shift the home position slightly without moving physical switches, you may adjust the related grid shift parameters, which ultimately updates how the value in 1860 is interpreted. Safety Warning

Modifying axis parameters like 1860 can cause the machine to lose its physical orientation. To prevent crashes: Enable Parameter Write (PWE)

: You must set PWE to 1 on the Setting screen before changes are allowed. Verify Coordinates

: Always verify the "Machine" coordinate display after any change to ensure it matches the actual physical location. : Always perform a full parameter backup to a formatted CF card or external drive before editing. en.industryarena.com (APC zero return) using this parameter? How to Enable Parameter Write Enable (PWE) on a Fanuc CNC

In FANUC CNC systems, Parameter 1860 a critical coordinate-related parameter used to store the current position of an axis when using an absolute pulse coder (APC)

. It essentially serves as the CNC's internal memory for where the machine tool is located in space even after the power is turned off. Core Function and Purpose Position Retention:

Unlike incremental encoders that require a homing sequence (zero return) every time the machine is powered up, an absolute encoder remembers its position. Parameter 1860 holds this numerical value for each controlled axis. System Correspondence:

It maintains the mathematical relationship between the mechanical position of the machine and the electronic pulses sent by the encoder. Relation to Parameter 1815 Parameter 1860 works in tandem with Parameter 1815 , which manages the absolute encoder's status: en.industryarena.com APC (1815 bit 5): Indicates if an absolute position coder is being used. APZ (1815 bit 4):

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:

If the backup battery for the absolute encoder fails, the system loses the data in Parameter 1860, resulting in a "300 APC Alarm: Need ZRN" (Zero Return Needed). Motor or Encoder Replacement:

When a motor or encoder is swapped, the physical link to the previous "zero" is broken. You must reset the reference position, which clears and updates the value in Parameter 1860. Mechanical Realignment: In the world of FANUC CNC systems, Parameter

If the machine's physical home position needs to be shifted (e.g., after a crash or maintenance), technicians may manually adjust the value in 1860 or perform a new zero-set sequence to overwrite it. en.industryarena.com Safety Warning

Modifying coordinate parameters like 1860 can cause the machine to "think" it is in a different location than it physically is. Incorrect settings can lead to machine crashes overshooting stroke limits . Always back up your parameters before making changes. Fryer Machine Systems Are you currently troubleshooting a "300 APC Alarm" or looking for the specific manual steps to reset your home position? Fanuc > Resetting Reference Position For Absolute Encoder

1. Navigate to the parameter lock. Change it from a zero to a one. 3. Press the SYSTEM hard key and navigate to parameter 1815 en.industryarena.com

Understanding FANUC Parameter 1860: A Comprehensive Guide

FANUC is a well-known Japanese company that specializes in the development and manufacture of CNC (Computer Numerical Control) systems, robots, and other industrial automation products. FANUC's CNC systems are widely used in various industries, including machining, aerospace, and automotive, to name a few. One of the key aspects of FANUC's CNC systems is their parameterization, which allows users to customize and optimize their machines for specific applications. In this article, we will focus on FANUC parameter 1860, its significance, and how to use it effectively.

What is FANUC Parameter 1860?

FANUC parameter 1860 is a specific setting within the FANUC CNC system that controls the "External Machine Stop" function. This parameter allows users to configure the CNC system to stop the machine under specific conditions, such as when an external signal is received or when a certain program event occurs. The External Machine Stop function is essential in many applications, as it enables the operator to quickly and safely stop the machine in case of an emergency or when performing routine maintenance.

Why is FANUC Parameter 1860 Important?

The External Machine Stop function, controlled by parameter 1860, plays a crucial role in ensuring the safety of operators and preventing damage to the machine. Here are some reasons why FANUC parameter 1860 is important:

Safety: The External Machine Stop function allows operators to quickly stop the machine in case of an emergency, reducing the risk of accidents and injuries.
Machine Protection: By stopping the machine under specific conditions, parameter 1860 helps prevent damage to the machine and its components, reducing downtime and repair costs.
Flexibility: The External Machine Stop function can be customized to suit specific application requirements, making it an essential feature in many industries.

How to Set FANUC Parameter 1860

Setting FANUC parameter 1860 requires a basic understanding of the FANUC CNC system and its parameterization. Here are the steps to set parameter 1860:

Access the Parameter Screen: Press the "PARAM" key on the CNC control panel to access the parameter screen.
Select the Parameter Number: Enter the parameter number 1860 using the numeric keypad.
Set the Parameter Value: Set the parameter value to the desired setting. The value of parameter 1860 can be set to 0 or 1, where:
- 0: The External Machine Stop function is disabled.
- 1: The External Machine Stop function is enabled.
Save the Changes: Press the "SAVE" key to save the changes to parameter 1860.

Common Applications of FANUC Parameter 1860

FANUC parameter 1860 is commonly used in various applications, including:

Emergency Stop: The External Machine Stop function is often used as an emergency stop feature, allowing operators to quickly stop the machine in case of an emergency.
Machine Maintenance: Parameter 1860 can be used to stop the machine during routine maintenance, such as tool changes or part loading/unloading.
Interlocking: The External Machine Stop function can be used to interlock with other machines or devices, ensuring that the machine is stopped when a specific condition is met.

Troubleshooting FANUC Parameter 1860

If issues arise with FANUC parameter 1860, here are some troubleshooting steps:

Verify the Parameter Value: Check that the parameter value is set correctly (0 or 1).
Check the External Signal: Verify that the external signal is properly connected and functioning correctly.
Consult the Alarm Message: If an alarm message is displayed, consult the FANUC alarm code list to determine the cause of the issue.

Conclusion

FANUC parameter 1860 is a critical setting in the FANUC CNC system that controls the External Machine Stop function. By understanding the significance of this parameter and how to set it correctly, users can ensure the safe and efficient operation of their machines. Whether you're a seasoned CNC programmer or a newcomer to the world of CNC machining, this article has provided you with a comprehensive guide to FANUC parameter 1860. By applying the knowledge gained from this article, you can optimize your machine's performance, improve safety, and reduce downtime.

A very specific topic!

Understanding FANUC Parameter 1860

What is Parameter 1860?

Parameter 1860 is a specific setting in FANUC CNC systems that relates to the "Input/Output" or "I/O" configuration.

Description:

Parameter 1860 is used to specify the type of I/O device connected to the CNC system. This parameter allows you to configure the CNC system to communicate with various I/O devices, such as programmable logic controllers (PLCs), input/output units, or other CNC systems.

Setting Values:

The setting values for Parameter 1860 vary depending on the specific FANUC CNC system and the I/O device being used. Here are some common setting values:

0: No I/O device (or Disabled)
1: FANUC I/O unit (e.g., I/O LINK or I/O Unit-M)
2: **PLC (e.g., SIEMENS, MITSUBISHI, or OMRON)
3: DeviceNet (a fieldbus protocol)
4: Profibus (a fieldbus protocol)
5: CANopen (a fieldbus protocol)

How to Set Parameter 1860:

To set Parameter 1860, follow these general steps:

Enter the CNC system's parameter setting mode.
Locate Parameter 1860 in the parameter list.
Set the desired value using the CNC system's keypad or pendant.
Press the "Set" or "Enter" key to save the new value.

Important Considerations:

When setting Parameter 1860, ensure that:

You have the correct documentation for your specific FANUC CNC system and I/O device.
You understand the I/O device's configuration and communication requirements.
You set the correct value to avoid any potential communication errors or system malfunction.

Troubleshooting:

If you encounter issues with Parameter 1860 or I/O communication, check: The Critical Rule: 1860 < Rapid Speed (1420)

The I/O device's connection and configuration.
The CNC system's I/O configuration and Parameter 1860 setting.
The system's error messages or alarm codes for clues.

By understanding and correctly setting Parameter 1860, you can ensure proper I/O communication between your FANUC CNC system and external devices, enabling efficient and reliable machine operation.