New laser cutter - Not cutting straight

[rjavier]

Hi, i'm completely new to the forum/ laser cutting thing so i'm sorry if i actually know very little. We recently got a LC1390 with a 150W tube, and after aligning the mirrors, and all the stuff you are supposed to do (also the platform was unleveled, we worked that out). So, everything seems to be in order but we have been cutting just circles and squares, and all of them come with imperfections on the edges. Basicaly all of them are not 100% straight, with no apparent pattern. The pictures can show that. This is 15mm MDF.



What should i do / check for?

Thank you all in advance

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[gweikelaser]

Hi Rjavier,
is your machine leetro system or RDCAM system?

Hi, i'm completely new to the forum/ laser cutting thing so i'm sorry if i actually know very little. We recently got a LC1390 with a 150W tube, and after aligning the mirrors, and all the stuff you are supposed to do (also the platform was unleveled, we worked that out). So, everything seems to be in order but we have been cutting just circles and squares, and all of them come with imperfections on the edges. Basicaly all of them are not 100% straight, with no apparent pattern. The pictures can show that. This is 15mm MDF.



What should i do / check for?

Thank you all in advance

[rjavier]

Hi Rjavier,
is your machine leetro system or RDCAM system?

Leetro i think, it uses lasercut 5.3.

[Gweikelasers]

Beam alignment problem

[AmyThunderlaser]

Hi, i'm completely new to the forum/ laser cutting thing so i'm sorry if i actually know very little. We recently got a LC1390 with a 150W tube, and after aligning the mirrors, and all the stuff you are supposed to do (also the platform was unleveled, we worked that out). So, everything seems to be in order but we have been cutting just circles and squares, and all of them come with imperfections on the edges. Basicaly all of them are not 100% straight, with no apparent pattern. The pictures can show that. This is 15mm MDF.



What should i do / check for?

Thank you all in advance

here's a trouble shooting lesson may help you:
Why engraving edge out-of-straight
good luck.

[rjavier]

Thanks for the link and indications. I've read them and done what i can so far.

So, after realigning and checking things, the problem is still there. I made this diagram to explain a little better why i do not think is the beam alignment.


Basically, doesn't matter where on the table i cut this square, the left side of it it's always uneven. And all of the others sides look very straight.

Thanks again!

[g.weike laser]

the problem happen in your last step in beam alignment
laser pass through third reflect and focus
belowing is video link on our website to teach you how to adjust the laser path
http://www.wklaser.com/vid_59.aspx