Cannot add two objects together

Bambu Lab Software Bambu Studio
3

I did more than you asked, and I have also detailed how you can repeat it yourself in the future.

I have made some tweaks and provided you with four versions:

  1. Face Down 2mm thick (1mm of design and 2mm total thickness)
  2. Face Up 2mm thick (1mm of design and 2mm total thickness)
  3. Face Down 3mm thick (1mm of design and 3mm total thickness)
  4. Face Up 3mm thick (1mm of design and 3mm total thickness)

spiderman tray tweaked.3mf (1.9 MB)

How did I do this? (Give a man a fish, and he will have print today, teach a man to fish, and he will print every day.)

Notes:

  • Your design element was 0.5mm thick, which would only print two layers, as your layer height of 0.2mm means it will only print the first 0.4mm.
  • It is far more common to have a 1mm thick design portion, or the colours behind the design will seep through, the blue would show through the white.
  • I wasn’t sure if you wanted a common 2mm or a thicker 3mm version, as you said 2-3mm.
  • Most coasters are 100 mm in diameter; yours is smaller. You can stretch it using the scale toolbar feature if you wish.

How to reproduce:

  1. I noted down which colours were assigned to which objects in the design portion.
  2. I selected your design portion as one item and used the scale toolbar option. I turned off “uniform scale” and set the height to 1mm.
  3. I selected the design portion and right-clicked, and selected centre, it already was, but just in case, always do this.
  4. I selected the disc portion and used the scale toolbar option. I turned off “uniform scale” and set the height to 2mm (optionally 3mm).
  5. I selected the disc portion and right-clicked, and selected centre.
  6. I select the whole area using the shift key and dragging a selection area around both parts. I find that easier, but you can use the object panel if you prefer.
  7. Right-click and select Merge from the context menu.
  8. Using the objects panel, I made sure the cylinder object (the disc portion) was the highest item in the list of child objects of the merge. It was sometimes when I played around, other times it wasn’t. As it is the background, it MUST be the top entry.
  9. I reviewed the other objects to see if the original colours persisted, and sometimes they did, sometimes they didn’t. I selected the incorrect entries and chose the correct colour.

I now had a perfect 2 mm-thick coaster facing down; this would generate a coaster with the buildplate texture. This is my preferred method.

As some prefer it facing up, I did the following.

  1. I added a build plate and selected it.
  2. I right-clicked the face down coaster and chose "clone’ from the context menu.
  3. I left the copy count as 1 and agreed.
  4. It created the duplicate on the second build plate.
  5. I right-clicked the new coaster and selected “Mirror > Z”.
  6. I right-clicked the new coaster and selected “Mirror > X”.

I now had a duplicate that would print face up with the design oriented the right way. Less important for this design, but worth remembering for when it matters, mirror both Z and X.

For your needs I create two pairs.