I am engraving in wood and image is 250mm wide. What causes the engraving to be noticably deeper about 12mm from each side? The image is the depth I want in the center, but towards the edges it is deeper. I have my overscanning set at 2.5%. I do think it is an issue when the laser fires when starting fom each side but what do I adjust? Is it a combination of speed and acceleration? Help is appreciated.
What speed and power are you set at and have you got constant power On.
Is the engraving darker within the 12mm area.
60watt diode, 2500mm/m, 30% power and yes constant power is on.
Try switching off constant power, if the rest of the job looks good then those speed/power settings are ok.
I might want to insert some opinions here.
If it is a hardware issue, then it could be that the acceleration curve isn’t constant when you are slowing down and speeding up during the reversal of the scan. That would cause an issue with the beam lingering more than the program thinks it is, causing deeper burns.
Or, hardware again, if the laser switching on is stronger at the beginning of a pass, due to pwm or power supply being a bit weak, then as it accelerates, the beam gets a bit weaker, resulting in an “apparent” error on the front end, while it is really an issue of the power supply losing current…
Or, hardware, the belt is a bit slack, causing it again to linger on reversals, again causing it to burn more ..
Or, software, you acceleration / deceleration curves are wrong…
And I could go on.. but that is my 50 cent opinions.
Thanks for the reply paul. I can eliminate that the belts are slack. Not sure how to diagnose the other causes you mention.
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