I got some great advice from Wren about using the rubber band selection used internal to a circle, but before I can do that I have to sort this issue with an outline of a rabbit.
The rabbit is required to be welded inside a circle and the sections either side and between the ears gets cut away and rabbit face details can then be engraved.
I have tried many times and read the Doc’s on weld/boolean/assistant but I either get the rabbit vanishing or the rabbit & circle seem to group but not weld.
All paths seem closed but not sure about Node placement (would love to read up on various Dots/Dashes indicators and how to identify closed/open shapes.
Alot seems to occur on screen that confuses the on site advice..I know its all relatively simple but my observation skills are a bit overwhelmed.
I did manage to get this to work yesterday but when I got rid of the iregular circle and replaced with a regular circle shape, they just wont weld even though the options boolean/weld are highlighted.
In this instance a Boolean Subtract is the correct choice. Selection order matters. Select circle, then shift select the rabbit. Click Boolean Subtract or open the Boolean Assistant so you can preview what will happen before committing.
Thats the one I got right but the cut line around the Celtic knot was far too untidy.
I’m going to attempt an internal rubber band…sort of thing..Ala Wren.
If you want, you can upload the lbrn2 file including the cetic knot,
then we can have a lock at it or even clean it for you or make proposals, how to do it yourself.
I increased the speed and dropped the power 1250/17.5% and reduced size to 90mm, just to see the outcome a bit quicker.
Before you sent that file I was trying to remove that cut shape bellow the rabbit but the Boolean/weld remain unhighlighted when I bring the nodes of the rabbit onto the circle or cut out that line..and I zoomed right in to be sure I was on target.
Do you think the tips of rabbits ears and widest part of body can be brought to join the inside contour of the knot..using rubber band.
Well, Pete, i would like to help you, if i can. In this case, it is better to describe exactly (perhaps with a drawing) what you want to achieve so that we can understand you better.
I’ve taken a look at your file SendTilRabitweld.lbrn2. That won’t work because everything is on one layer, so it’ll cut along the blue lines, and the work will fall apart into pieces. As you can see in the file I sent you, you need at least two layers: one for cutting and one for engraving, even if you only want to engrave the lines in the celtic knot.
Thanks, I’ll study that again a bit later when I’m at the workshop.
Getting the harp/knot to work was ok but the misunderstanding of the rabbit weld is still on my mind.
If you try the technique I describe in this video vyou can use it to extend your rabbit ears or the harp parts onto the ring. The video is set to start just before where I show the technique.
Was just looking at the rabbit after watching your vid and I see what you mean.
That would be a big improvement.
The Harp and knot came together petty well and thanks for your help (Thanks also to Tilman & Wren) with the boolean-subtract as I may have never considered it an option…brain stuck on weld!
I moved the “Celtic Knot Ring” to the side for a while so you can see what’s happening.
Draw a circle
Center both elements of the blue layer
Select the outer shape and then the inner one
Perform Boolean operations A-B
Import an image of the rabbit
Trace image (Alt-T)
Assign layer → Line
As already described in several posts, Lightburn currently cannot “trace center line” (yet).
Therefore, you must now remove one of the two lines. To do this, ungroup them first.
Fit the bunny into the ring so that all four corners of the bunny overlap the ring.
Select the bunny and the ring.
Use the Boolean operation “A or B.”
Center and group all elements, and adjust the size if necessary.
As always, adjust the layer values (speed and power) to suit your laser and material.
When you trace the knot (in the video) and press ok, your ‘00’ layer colour changes to red but on my version I get a second ‘00’ layer.
Also when I change to ‘fill’ the knot design does not fill with color as yours did.
Next I spotted what may be a flaw in my knot design, as the outermost line blends with a number of components of the knot.
These ‘flaws’ seem to shift from place to place as I work with the edit tools.
So I imported your version and deleted the circle/rabbit to continue that part of the process.
I imported the rabbit after drawing the circle (Ah! this may be my mistake..Not sure if I combined the inner and outer circles A-B).
Anyway the Weld/Boolean would not hilight under any arangement with the rabbit but every other shape or image I tried worked ok.
I had limited time today but will have another go sometime tomorrow.
After you traced the knot, the result is marked, then you click on another layer, they are all listed at the bottom of your screen
It is important to know, how to assign layers to different objects.
When you change the layer from “line” to “fill” it ist not automatically shown. It depends on the settings … settings → display → Filled Rendering (slower).
