Industrial manufacturing
Industrial Internet of Things | Industrial materials | Equipment Maintenance and Repair | Industrial programming |
home  MfgRobots >> Industrial manufacturing >  >> Manufacturing Equipment >> CNC Machine

Mastering Fanuc G04 Dwell Command for Precise CNC Timing

What is Dwell?

By specifying a dwell (G04), the execution of the next cnc program block is delayed by the specified time.

Mastering Fanuc G04 Dwell Command for Precise CNC Timing

Fanuc Dwell G04 Command

A program dwell time can be created at any point within a program.
Fanuc G04 Dwell time is a non-modal G-code.
G04 Dwell time is from G-code group 00.

Some CNC programming cycles have their own dwell facilities within the cycle itself.

Fanuc Dwell G04Format

G04 X… (sec)

G04 U… (sec)

G04 P… (msec)

The dwell time starts at the moment when the tool movement speed is zero.
With address P no decimal point is allowed.

Fanuc Dwell G04 Examples

G04 P1000 (equals 1 second)

Example

so to program 10 Seconds dwell

G04 X10
G04 U10
G04 P10000

Example

G04 X2.5 (dwell time = 2.5sec)
G04 P1000 (dwell time = 1 sec = 1000 msec)

How dwell for Specified Revolutions?

Fanuc Dwell G04 pause in seconds.
It is possible to have the pause in number of revolutions by using following formula,
Seconds of pause for one spindle revolution = 60 / S (spindle speed in rpm)
Example
If the spindle rotates at 300 rpm, the pause time for one revolution will be 60 / 300 = 0.2 seconds
If a pause is required equal to  3 rpm,

G4 U0.6  (0.2 seconds x 3 rpm)

CNC Machine

  1. Fanuc iRVision – Advanced 2D Robot Vision System for R-30iA Controllers
  2. Simplify G04 Dwell Time Calculation: A Practical, Cost‑Effective Method
  3. Fanuc G68 Coordinate Rotation: Precise Axis Alignment for CNC Machining
  4. Fanuc Subprogram Example: Simplify CNC Programming with Subroutine Techniques
  5. Haas G04 Dwell Command: Precise Delays in Seconds and Milliseconds
  6. Tormach G04 Dwell: Pause Axes for Precise CNC Timing
  7. Fanuc 21 CNC Control: Complete Alarm Code Reference
  8. Fanuc G04 Dwell: Mastering CNC Pause Commands
  9. Comprehensive Guide to Fanuc Series 15 Alarm Codes
  10. Fanuc 10/11/12 CNC Alarm & Error Codes Guide