I was creating my first “real” project today and ran into an issue with the laser operation. My print was truncated at the “top” (Y-axis), making part of the print useless to me.
My project was about 120 mm wide (x-axis) and 215 mm tall (y-axis). I sent the file to the device and hand located the origin point. I ran the trace outline and made sure it fit on my board. I set the origin point about an inch from the bottom. The outline had a good inch from the top when it ran. I started the print, and checked on it after a few minutes. I realized my print had been truncated.
In Luban, the print shows as 215 mm tall, both in the Laser module where I read in my .svg files and in the Workspace. The images on the computer screen show a full sized (not truncated) image. On the device touchpad, the preview from the file structure shows a full height image also.
Why did it truncate my print? Is there something I am missing on the allowed height of a print? Is the actual laser printable area 1" short on all sides? The trace outline matches where it was cut off. How was I supposed to know that meant it was being truncated?
Is that an A250? EDIT: Just re-read your post! It looks as though you may have set your work origin too far down the bed, max Y on A250 is 250mm and you look to have a fair bit of unlasered material at the front of the bed.
So when it says the max print area is 250 mm, it actually means you must fit your print into the centered 250 mm of the print bed. Otherwise, it will truncate?
Seems odd that I can’t adjust the print a little up or down, while still inside the perimeter of the print bed. If this is the case, then I should draw a box on the print bed highlighting where it can really print.
I was just looking for some reason, I don’t know for sure, it does look as though there should have been room to do the job. Next time I have the laser on I’ll give it a try. As @xchrisd said, running the boundary should show this up.
I agree running the boundary should have flagged the issue. Like I said, I ran it, and it looked fine, but once it started printing, the print stopped at the boundary, truncating the full print.
I believe the issue is that my bed is not centered. It appears to be about 20 mm too high in the Y-direction. I have reproduced the truncation with another print. My camera captures also places my y=0 about 20 mm up the print bed. I recall setting zero when first turning on the machine, but I don’t recall if that was just setting where home is or setting the machine’s 0,0,0.
Is there a way for me to reset where the machine thinks the print bed is?
I notice that the image was not in the center. The Work Origin shou be the center of the whole work. When previewing the files, you can consider the Zero point as the Work Origin. Could not make sure if this would help but you can give it a try.
No, you can set the work origin wherever you want it. You just have to match how you placed it in Luban. You are not required to just stick with a centered project. I find placing the project in the upper left (Luban has a RMB snap placement feature). Then I can place the work origin and visualize better where it will fall on my board in the machine. The problem is that when running the boundary, it lets you place the origin too high and doors not tell you it will truncate the print because of it.
It looks as though you may have set your work origin too far down the bed, max Y on A250 is 250mm and you look to have a fair bit of unlasered material at the front of the bed.