Foxalien, ONLY the center of the fill is offset. It doesn’t appear to affect the a separate area of the burn either, which makes this seemingly specific to this shape or just the line length.
Exactly the same problem as before. I haven’t been able to solve this and I’m getting back into laser work. I need more shipping boxes done and I have some gifts I would like to make but right now I can’t trust the machine to do what it’s told.
I tightened the x belt again, hasn’t helped this time.
Does anyone have any new ideas?
I am now burning boxes at 18000/40%, understanding that it will never get going that high in reality but turning it down clearly affects the speed to an enormous degree, even though the math says it shouldn’t.
new update, i tried re grouping objects in the burn so that the passes are shorter lines. it didnt help. i think there may be something wrong with the machine itself, i sticky point on the slides or something. the offsets are in the exact same position as before, right down the middle.
If you run the4 project at different areas of the bed does the issue stay in the same part of the text or does it stay in the same area of the bed? Try rotating the text and see how it acts.
Did you test it with 10mm/s? While looking at the text you posted in the other thread, to me, it looks like the laser is running higher speeds than the controller can handle. In the acceleration and deceleration phases, the laser fire timing is ok, but once it reaches the high speed phase, the ignition of the laser takes too long for the current speed.
If my theory is right, there will be a speed value where this effect disappears. And turning speed up until it starts to appear will give you the maximum speed your system can handle. Most 20W and higher diode modules weight 1kg or more, speeds above 10,000 mm/min are very unrealistic. I’d use 8,000mm/min maximum.
I can def run a test like this today and report back.
The speed difference of the machine between 18,000 and 12,000, even though the machine acceleration is only 1,000 and a pass is less than 2 seconds (top calculated speed ~2k) is enormous. It makes my total project pattern go from a 12 minutes to 16 minutes. I can only imagine what dropping it to 100 or 1000 is going to do.
The Motion planner in GRBL also reduces power output by a ratio of current speed to demanded speed. It’s part of the cornering algorithm.
If you’re engraving (back and forth) instead of doing vector art (Lines and curves in X & Y) you may find it beneficial to reduce the Max Travel Rates to your X-Axis Engrave speed.
If the laser is ‘pulling power’ because of the speed difference between the ‘travel speed’ and ‘engrave speed’, reducing the travel speed (the Max Travel Rate) should fix it.
I think you’ll want to tinker with the Setting for $110. Please let us know what you discover.