How do I print a Y nozzle

[wirlybird]

Haven’t used Repetier so I’m no help there! It says it used Slic3r to generate the gcode? If so it looks like an old version so maybe an update is worth looking at.

Temp is pretty good. You might try going lower in 5 degree drops and see how the filament does but still pretty good at 200.

I would drop overall print speed to 30-35mm/sec or so. You will want slow to allow the layers to cool a bit especially on a smaller part.

If you have a part cooling fan make sure it is on after the first layer or so.

Is it really a .5 nozzle? How big is this part? It looks like it should be able to print ok. I think speed may be a factor.

[chanman]

Looks like you need a filament cooler, the layers are drooping before the next layer comes in, try slowing down the print speed.

[emilyc]

I will drop the overall print speed and see what happens.

So far I have not seen any problems with other printed objects, just this particular Y nozzle.

Thank you for taking time to reply.

[emilyc]

Hello!

I reduced the speed and this time managed to print a complete Y nozzle.

However there seems to be cracks. I have attached some pictures.

Any idea how to solve this?

Thank you:)

[emilyc]

Hello!

I have the fan running at all times. I have tried slowing the speed and increasing its thickness a bit.

Managed to print out a complete Y nozzle, but it still has cracks between joints.

[wirlybird]

You might increase the extruder temp a little for better layer bonding but not to much. Try 205 and see how it goes. I would measure the filament diameter in several spots and enter that average in the slicer. The horizontal lines may be a mechanical issue or the extrusion is off but one thing at a time.

That split in the middle could be the model and not the print. Not sure without looking into it more.

[emilyc]

The current extruder temperature is 205. I didnt increase it further yet.

I think the split is also due to the model, but I’m not sure how to improve it.

Thank you for your replies so far.

[wirlybird]

You may want to run the model through a fixer like Netfabb to see if it finds any issues.

[chanman]

I see the cracks, how did you create this model? Are you sure the model is 1 solid and not two solids “very close together” I have seen this happen on one of my prints where there was actually a very small gap where parts met. When this part was printing, did you watch the nozzle as it printed the upper portion of the part? did the nozzle print each side separately? if it went in a figure 8 pattern then the gap would not have been there.

Can you post the 3d model file (STEP will work) or the STL file?

[emilyc]

The nozzle printed both sides together, then towards the end, focused on one side and ending it before moving the other side.

I am attaching the stl file.

The stl file had some manifold problems which i then got it fix on netfabb.
y_nozzle_22_mm_fixed.stl (300 KB)

[emilyc]

Actually when i uploaded my initial stl into Repetier, it says object is not manifold and asked me to fix it using Netfabb.

I did and here’s the fixed stl file.
y_nozzle_22_mm_fixed_0.stl (300 KB)

[wirlybird]

I’ll give it a try this afternoon if I get a chance. Curious to see how it does since it does!

[wirlybird]

Ok, after taking a look at this file what you have is basically three tubes that are together but not joined. There is a gap in between them. Here is a pic of it in my slicer. You can see the gaps. Ignore the grey stuff.

[chanman]

I saw this also when importing this into Inventor.

[emilyc]

Thank you for looking at my file.

It means that there is a problem with my drawing, right?

Actually, I’m a newbie in drawing too. I drew the nozzle following a guide on youtube.

So if someone can tell me what is wrong and how to correct the drawing I’d be grateful:)

Thank you.

[chanman]

You can see the problem in Fusion 360, go to Inspect, Section analysis pick a face (I used one of the top faces) and then drag into the model, once you get to the intersection, you will see the outer wall is connected but the internal is split open

[chanman]

Here is a quick model made in inventor of your nozzle, the dimensions are not exact, hard to take measurements of a mesh model. Steps are create the lower cylinder, draw a line from the center at an angle, draw a rectangle and use the line as an axis of revolution, repeat. Perform a Shell operation, finish.
y_nozzle.stl (101 KB)

[emilyc]

Hi Benson,

Thank you for taking the troubling to check my drawings.

I’m sorry I don’t really understand the steps you took to make the Y nozzle using shell command.

1. Drew a Y

2. Drew a circle OD: 31 mm, followed by a hollow extrusion - done for each plane

3. Trim

4. Thicken surface: 1 mm (in my previous stl file I did 2 mm)

5. Directly print to stl

If you don’t mind, I have done a step-by-step how I drew the nozzle in Inventor.

I am beginning to suspect if my trimming is incorrect.

If you have time, appreciate if you could tell me where I did wrong.

Thank you so much.
y_nozzle.pdf (244 KB)

[chanman]

Looks like you are also using inventor.

Here are my steps

1. create solid cylinder (revolve a rectangle around the Z axis)

2. Use the XZ Plane and create a new axis off the center of the first cylinder and the angle desired

3. Create a rectangle off the new axis and revolve a new cylinder

4. repeat for the third cylinder

5. Use the Shell command under 3D Model and pick the three flat planes of the nozzle, the planes that you pick will be the openings. Set the shell thickness that you want the wall thickness to be.

[emilyc]

Thank you so much for the steps.

I will try this soon:)