I know I can select a starting position based on 9 dots but is there a way for me to manually move this green starting position?
Is there something specific youâre trying to achieve by moving the green box? The green box indicates job origin, meaning youâre establishing the local coordinate system for that job.
Are you trying to set where the laser actually starts burning?
If so, that can be achieved with the âSet shape start pointâ tool.
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Exactly what I was looking for. This should be added to online help doc under âJob Originâ. Thanks!
Oh when I click on it, it doesnât move the green dot. How do I still move the starting position?
Here is what I am trying to do. I have been using âcurrent positionâ to align the head with the object but the following 9 locations donât always work for me. Instead of being limited to this 9 locations, can I also arbitrally move the current position (Green dot) to where I want it to be? Thanks again.
Note that job origin is unrelated to start position of the shape. So green square will not move as you change the start position of the burn.
The blue arrow indicates where the burn will start and in what direction it will move.
Click on a different node of the shape to change where the burn starts.
If you hover over the tool youâll get additional tips on how it can be used. You can use the tooltip modifiers to reverse or reset:
Can you describe a little more why the set positions donât work for you?
Iâm getting the impression that youâre using this in order to position the laser against your work material but not why or how. More detail would be helpful.
Keep in mind that Job origin is really about establishing from which position the rest of the job should be interpreted in terms of starting position.
Ah⌠yes I see what you are saying. I guess I tried to figure out a way to start burning from a specific position regardless of the job origin. The current position combined with a preset job origin works very well for me when I start a new job. However, there are situations when I need to go back to a specific spot to start burning again. For example, letâs say I have a sentence but one of letters isnât cut through and I want the laser to pick up from a very specific location to burn. What is the best way to achieve it?
I did try to use âPreviewâ and use âStart hereâ but it never worked successfully. Perhaps, that is something I should root cause instead of finding a workaround.
Got it. If your primary intent for wanting this is to go back and reburn certain areas of an existing burn then I think youâre barking up the wrong tree with trying to do it from job origin.
In fact, you may be doing yourself a disservice by trying to use âcurrent positionâ for this as it will complicate this process. If you are using âcurrent positionâ for your initial burn, unless youâve recorded that specific position it will be virtually impossible for you to go back to that exact position. Iâd suggest using absolute coords for the initial burn and subsequent burns. This will allow you to use Preview and Start here more easily to go back in and redo certain spots. Also, do NOT rehome at any point after the initial homing until you are done with all operations. While close, it will not get you to the exact same starting position.
Iâve actually put in a feature request to add an âEnd hereâ capability to complement âStart hereâ to that feature in Preview to address these type of needs. If this would be useful to you it would be nice if you could upvote that request so that it gets more attention.
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If the parts are separate, you might look at âCut Selected Graphicsâ as a possible option.
You could select the letters and âsendâ them by themselvesâŚ?
@snowcabinwa This is a great tip from Jack but keep in mind that this is independent of working out the coordinates. You need to get that sorted out first.
In cnc router software you move the drawing around in Vectric or whatever cam your using and the 0,0 represents the origin. Then set the origin on the machine. That seems logical
In lightburn its not obvious how you set the drawing to the origin. It would be nice if you could move that square origin marker on top of some drawing feature.
Real world use for this would be wood gears. Instead of cutting the center you instead locate the blank on a fixture and find a way to set origin on that fixture. That all works. The challenge becomes how to force lightburn to set origin to center of the gear drawing?
You can use âcut selected graphicsâ and âuse selection originâ to define origin based on object. Use the origin selection grid to set position to center if you want the job to originate from center.
I use a small cnc and I donât find them different.
How do you align a part on your cnc different than you do with the laser?
They are essentially the same thing, at least the x & y axes, just different head(s). Take away one dimension, Z and it should be even more simple.
I have alignment jigs for my cnc, same as my laser.
Maybe I mis understood the question�
The green dot does not represent a starting location but is a reference for aligning the laser head. In CNC terms, think of it as touching off at the bottom corner of your board. The design is the offset from that location.
If you look at your drawing, you will see that the green dot aligns with the top and left side of your design.
You can choose other origin âalignmentsâ using the 9 dots for choosing an origin location. If you choose center then the dot will move to the center of your design and like on the CNC, you would find the center of where you want the design to be on your material. Move the laser head to that location and press the Origin keypad button.
If you choose the origin location on the middle left (9 oâclock dot) the the green dot will move to the left point of your design.
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