CNCProgramming: G96 and G97 Spindle Speed Commands

G-code is used by CNC (computer numerical control) machines to create objects. The language uses a series of letters and numbers to create commands, which the machine then reads and carries out.

G96 and G97 are two commands that control the spindle speed on a CNC machine. G96 sets the spindle speed to a constant rpm, while G97 sets the spindle speed to vary based on the feed rate.

If you're new to CNC programming, these two commands may seem confusing. But with a little practice, you'll be able to use them to control the speed of your machine.

The G96 and G97 spindle speed commands are both used to set the speed of the spindle.

The G96 and G97 spindle speed commands are both used to set the speed of the spindle. The main difference between the two is that G96 sets the spindle to a constant speed, while G97 allows the spindle to ramp up or down to the specified speed.

G96 is typically used for cutting operations where a constant speed is desired, such as when machining a smooth surface. G97 is often used for drilling or tapping operations, where the spindle needs to ramp up to speed quickly before starting the operation, and then ramp down again afterwards.

Which command you use will depend on the specific operation you're performing and the speeds you need to maintain. Experiment with both commands to see which works best for your application.

The G96 command sets the spindle to a constant speed, while the G97 command sets the spindle to a variable speed.

There are a few things to keep in mind when using the G96 and G97 commands when programming a CNC machine. First, the G96 command sets the spindle to a constant speed, while the G97 command sets the spindle to a variable speed. Secondly, when using the G96 command, it is important to make sure that the spindle is already up to speed before issuing the command. Lastly, when using the G97 command, the spindle speed will be controlled by the S parameter in the Gcode program.

Now that we have gone over the basics of the G96 and G97 commands, let's take a look at an example of each.

Example 1:

G97 S1000 M3

This would set the spindle speed to 1000 RPM and start the spindle spinning in the clockwise direction.

Example 2:

G96 S500 M3

This would set the spindle speed to 500 RPM and start the spindle spinning in the clockwise direction.

The G96 command is typically used for cutting operations, while the G97 command is typically used for drilling operations.

The G96 command is typically used for cutting operations, while the G97 command is typically used for drilling operations. This is because cutting operations typically require a higher cutting speed, while drilling operations typically require a lower cutting speed.

The G96 and G97 commands can both be used with or without a speed override.

G96 and G97 are both commands that can be used to override the speed of a machine. They can both be used with or without a speed override. The main difference between the two is that G97 will only override the speed if it is explicitly stated in the program, while G96 will override the speed regardless of whether or not it is stated in the program.

The G96 and G97 commands can both be used with or without an eccentricity compensation.

The G96 and G97 commands can both be used with or without an eccentricity compensation. Eccentricity compensation is an important feature when using a CNC machine because it can help to improve the accuracy of the cuts. When using an eccentricity compensation, the machine will take into account the offset of the cutting tool from the center of the workpiece. This can help to improve the accuracy of the cuts by reducing the amount of material that is removed from the workpiece.

The G96 and G97 commands can both be used with or without a feed rate override.

The G96 and G97 commands can both be used with or without a feed rate override. With a feed rate override, the axis motion will be limited to the programmed feed rate. Without a feed rate override, the axis motion will be limited by the machine's maximum feed rate.

Fequently Asked Questions

  1. What is G-code?

    G-code is a language that CNC machines use to understand what actions to perform.

  2. What is the difference between G96 and G97?

    G96 is a mode that causes the spindle to rotate at a constant speed. The speed is set with the S command. G97 is a mode that causes the spindle to rotate at a constant speed that is proportional to the feed rate.

  3. How do you use G96 and G97 to control the speed of the machine?

    G96 controls the speed of the machine by turning the spindle speed control knob clockwise to increase speed, and counterclockwise to decrease speed.

    G97 does the same thing as G96, but it also controls the direction of the spindle. Clockwise turns the spindle in the reverse direction, and counterclockwise turns the spindle in the forward direction.