Aligning irregularly shaped objects edge to edge

[havocsforge]

I am trying to get the top of the circle to line up with the bottom of this object, but affinity treats the bottom as the two points.

I have maxed out the resolution to 6 decimal places and the lines are still not exactly on. I didnt think it would be an issue, but lightburn still treats it as two lines, which takes longer to cut and such.

even spacing them exactly an inch apart doesnt line them up when mathematically it should because i created the shapes using exactly an inch. I have tried everything i can think of to get them to line up and nothing is working.

 

[GarryP]

Can you give us more details about what you are trying to do?
I have no way to interpret the screen-grabs you have given and I don’t quite know what you mean by, for example, “the bottom of this object”, “exactly on”, “line them up”, or “I created the shapes using exactly an inch”.

[havocsforge]

1 hour ago, GarryP said:

Can you give us more details about what you are trying to do?
I have no way to interpret the screen-grabs you have given and I don’t quite know what you mean by, for example, “the bottom of this object”, “exactly on”, “line them up”, or “I created the shapes using exactly an inch”.

With laser cutting, if two lines are exactly lined up, the laser only goes over it once.

The first screen grab is the shapes, the second is incredibly zoomed in where they should meet. The two blue lines are what need to be exactly in line, but it's less than .000001 inches.

If they are off by even a fraction its two lines, thus longer cut time and wider less precise cuts.

So I took a 30mm circle, copied it, dropped it 1 inch and used that to remove a portion of the original circle with the subtract, thus creating something like a 3/4 full moon shape.

I then copied that shape and spaced them 1 inch so they theoretically should have lined up exactly, since that's exactly what I did to before subtracting.

But they don't line up. I tried many possible solutions. It's kinda frustrating that you can't pick two nodes and have them align from two different shapes. I tried a few different ways and it didn't work.

Only thing I didn't try is millimeters or a different unit because I have about a hundred shapes I need to do this with and am looking for an easier method than moving it .000001mm at a time.

 

 

[Alfred]

31 minutes ago, havocsforge said:

So I took a 30mm circle, copied it, dropped it 1 inch and used that to remove a portion of the original circle with the subtract, thus creating something like a 3/4 full moon shape.

I’m not sure why you’re mixing millimetres and inches (not that it should matter for the scenario that you’ve described).

34 minutes ago, havocsforge said:

I then copied that shape and spaced them 1 inch so they theoretically should have lined up exactly, since that's exactly what I did to before subtracting.

When you say “spaced them 1 inch”, do you mean you moved the copy of the shape down by an inch to occupy the space where the second circle originally sat? If so, then I agree that it should have lined up exactly.

[MEB]

Hi @havocsforge,
Do you want to align them after the fact (after the subtraction is performed) or you don't mind recreating this from scratch following a few instructions to get them perfectly aligned? Is it feasible to recreate it from scratch?