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Print different regions in different colors


Actos
Go to solution Solved by Slashee_the_Cow,

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Posted · Print different regions in different colors

Elegoo Cura v 5.6.0

Is this possible ?  I would like to print the outer section of this sign in black, the middle section of the sign in white and the letters in red. I know I can change filament per layer, but I want to do per region. The outer portion is 3 mm thick, while the inner (white) is only 2 mm and then the letters start at layer 11 (red).  Is this possible ?

 

image.thumb.png.9f2a0bad8b68bde14f3e5fbe6efb9352.png

Packages Sign d01 v364.stl

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    Posted · Print different regions in different colors

    Recommended solution: As all of your features are at different heights, you can just get away with changing filament at layers. You do white until the inner area finishes, then switch to black until the outline is finished, then switch to red for the text. You'll be able to see the banding if you look from the side, but whether that's a problem is up to you.

     

    Recommended solution for no banding: Print two separate parts. First you do the outer section except make it cover all of the back, say 1mm thick, so there's a hollow for the inner piece. Then print the inner part (except 1mm thinner) in white and switch colour to red when you get to the text. Glue the inner part into the cavity in the outer part - if you're using PLA then regular old superglue (cyanoacrylate) works wonders.

     

    Single print with no banding but major hassle solution: Import each part as a different model. Put them all in place in Cura and slice it. Open the gcode file and whenever it changes model, insert code to park the head and pause the print. This will probably require you to change filament twice a layer, hence the "major hassle" disclaimer. I think @GregValiant might have a post-processing script that can help with the gcode changes required but even with that I can pretty much guarantee you that it's far too much hassle changing the filament constantly at the printer to be worth it.

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    Posted · Print different regions in different colors

    I agree that Slashee's "Recommended Solution" is best for this model.  It only requires two filament changes, and nobody but you will notice the side "banding" (which you could paint with a black magic marker if you were really picky).  Another plus is that the model doesn't require any changes to do it that way.  The areas to print in different colors are already at different heights.

     

    To avoid the banding, this would probably need to be two models (black frame with a mortice on the back, and the inside white part with the lettering that would fit into the mortice like a picture in a frame).  A plus to that is the letters could be flush with the top of the black frame.  The white base with the red letters would still require a filament change.

     

    You will want to have retractions when the nozzle moves from letter-to-letter.  Make sure the "Retraction Minimum Travel" is set to 1.5.  It needs to be less than the distance between the letters.  Also...consider enabling Z-hops.

    Both of those suggestions can help minimize stringing between the letters.

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    Posted · Print different regions in different colors
    4 hours ago, GregValiant said:

    To avoid the banding, this would probably need to be two models (black frame with a mortice on the back, and the inside white part with the lettering that would fit into the mortice like a picture in a frame).  A plus to that is the letters could be flush with the top of the black frame.  The white base with the red letters would still require a filament change.

    I'm pretty sure that was my "recommended solution for no banding" 😕

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    Posted · Print different regions in different colors

    Thank you. If I couldn't change colors based on region, that was my original idea. Print in white then just paint the outside in black. I bought these acrylic paint pens from Amazon when I first bought the printer, being a noob (still am), I didn't even know you could do filament changes. This may be the route since it doesn't need to look beautiful or professional.

     

    I do also like the idea of designing the outside shell in black and then the inside the white/red and combine the parts.

     

    Even easier still, just print in white and use the acrylic pens to paint the black and red sections.  😉

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    Posted (edited) · Print different regions in different colors
    7 hours ago, GregValiant said:

    "This may be the route since it doesn't need to look beautiful or professional." 

    Sure it does.

    No reason not to do it nice.

    Usually yes. But this was just going to let package delivery people know. they ignore printed ones too, so I wasn't betting much.  🙂

     

    Here is a "proof of concept" of something similar. I am just waiting for the colors to get here. I painted these the white and red. For this, black background, white text, then I will print a red heart and place it in the middle.  For reference, my mom and dad's wedding date, and date she passed, so they are together again.....  ❤️ 

     

    It will replace the color printer sign I did "real quick" for this...

    Parents were big fans of Disney. I thought Minnie + Mickey was a cute touch.  ❤️

    Just haven't decided how to integrate the 3d printed version yet.

     

    IMG_20230803_151807.thumb.jpg.cd880f56aea0d40b7e99aeb3a5432b6c.jpg

    IMG_20240608_224426.jpg

    Edited by Actos
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    Posted · Print different regions in different colors
    2 hours ago, Actos said:

    Usually yes. But this was just going to let package delivery people know. they ignore printed ones too, so I wasn't betting much.  🙂

    You could have a sign with strobing lights and a proximity-triggered speaker that plays "Waterloo" whenever someone approaches the door and they'll still ignore it.

     

    2 hours ago, Actos said:

    Just haven't decided how to integrate the 3d printed version yet.

    Find a frame big (and thick) enough to fit your 3D printed message and the two photos. I would actually paint the colours on the 3D print rather than change filament because it shows there's a human touch involved, not just a sign created by a stupid machine.

     

    Put the 3D print at the bottom and have the two photos mounted onto the front of the frame (glass or whatever material you end up getting) evenly spaced in the area above, so vertically there's an equal distance from the top of the frame to the top of the photo and the bottom of the photo to the top of the print, and horizontally you go
    -P-P-
    (- = gap, P = photo) so all the gaps are the same width.

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