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Simplified Chinese G200 - Laser Parameters
Overview
The G200 command defines the operational parameters for laser control, including the minimum laser power level and power ramping behaviour.
This command can be placed anywhere within a G-code program to configure laser operation parameters dynamically during a job.
Activating the Laser Tool
To access the Laser settings screen, Tool 111 must be selected.
This can be done by issuing the following command:
T111 M6
It is recommended that this command is included in laser G-code files to ensure the controller is set to the Laser tool before executing any laser-related commands.
Syntax & Parameters
The G200 command uses its parameters to configure laser operation.
The Q value sets the minimum laser power output level, expressed as a percentage of full power, and enables power ramping.
Description
The G200 command controls how the Laser tool behaves during operation.
By default, G200 laser mode is disabled.
Issuing G200 with a Q parameter enables laser mode and activates power ramping.
Issuing G200 without any parameters disables laser mode and turns power ramping off.
The G200 laser function operates only with M03 (laser on) and has no effect when using M04.
Q Parameter – Minimum Power and Power Ramping
When a Q value is specified, two laser control functions are enabled.
Minimum Power Level
The Q value defines the minimum laser power output used whenever the laser is active using M03.
This feature is useful for applications such as laser welding or engraving, where maintaining a baseline power level helps prevent weak burns, incomplete welds, or inconsistent marking.
For example, issuing:
sets the minimum laser power to 5 percent, with power ramping enabled.
If no minimum power level is required, the following command can be used:
Power Ramping
Laser cutting and engraving power depend on both the commanded power level and the axis movement speed.
When axis speed decreases, such as during acceleration, deceleration, or cornering, more laser energy can be deposited in one area. This can cause darker burns, deeper engraving, or overcutting.
Power ramping automatically scales the laser output based on the current axis speed to maintain consistent cutting or engraving results.
Power ramping provides the following behaviour:
The laser power increases smoothly during acceleration.
The laser power remains stable during constant feed rate motion.
The laser power reduces gradually during deceleration.
Power output is compensated automatically during Feed Rate Override changes or corner slowdowns.
Example Program
In this example, the minimum laser power is set to 0 percent.
The requested maximum laser power is set using the S value, where S800 represents 80 percent power.
The controller automatically ramps the laser power proportionally based on the current axis speed.
Laser Power Ramp Behaviour
As the axis accelerates from 0 to 1000 millimetres per minute, the laser output increases proportionally to the movement speed. This ensures consistent energy delivery across the entire motion path.
Actual Speed | Actual Laser Power Level | Requested Power Level |
0 | 0% | 0% |
50 | 4% | 5% |
100 | 8% | 10% |
350 | 28% | 35% |
700 | 56% | 70% |
920 | 73.6% | 90% |
1000 | 80% | 100% |
