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6 inch cube - 79 hour print!

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Posted · 6 inch cube - 79 hour print!

Hello.

I am going to be test printing a wild bee house, it's a 6 inch cube with holes in it. I jut want to print fast and ugly for now to test the size and design. The low quality setting in Cura is telling me 79 hours, which cannot be right! In expert settings I'm on 0.2 layer height, 50mm second, 5% infill, 1.2 mm wall thickness. It goes to 89 hours!

Help. :)

 

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Posted · 6 inch cube - 79 hour print!

Uploading to Youmagine now, looking at the layers the thing is basically empty - I think Cura is lying.

 

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Posted · 6 inch cube - 79 hour print!

Amazing - Kisslicer time estimates are in the same ballpark - about 80 hours. Hard to see why it should take that long.

I was able to get Kisslicer's estimate down to 48 hrs. by only doing Infill every third layer.

 

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Posted · 6 inch cube - 79 hour print!

It is a huge cube. I once printed a model that size, but totally hollow, no infill only 2 perimeters (.8mm walls) and 80mm print speed and it took 24 hours.

So with infill, those very thick walls (1.2mm), and 50mm is kind of a slow print speed for an UM. Yes, it is probably

spot on. You could speed it up slightly by reducing the wall thickness to .8mm. Increase print speed, increase infill speed higher. You could try pushing the layer height to upper .2's or low .3's with possibly a higher than usual temp to compensate for the larger amount of plastic.

Forcing the printer to run faster is tricky, and can result in a half print. Just so you know.

Larger prints like this need a larger nozzle size so you can do a much larger layer height.

 

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Posted · 6 inch cube - 79 hour print!

It is huge indeed. Just imagine in your head how much the print head has to move on every single layer of that print (all 810 of them). Just take the rings in the center for example, that's 64 retractions on those alone. Say it takes a second to do a retraction (I've never timed it so I have no idea how long it actually takes), that's an extra (64*810)/60/60 = 14+ hours on retractions alone. It adds up quick.

 

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Posted · 6 inch cube - 79 hour print!

Well Cura 14.01 does not think it is a 6 inch cube. If you rescale to 30% it fits onto the build plate - and I think my bed is a bit bigger than that on a UM1.

Layer height .1 and print speed 20ms and infill 20% gives me 10.5 hours

 

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Posted · 6 inch cube - 79 hour print!

Please post pic but if you can print 10mm^3/sec (some can't) then you can do .2mm layer, 230C, 120mm/sec, no retraction .8mm walls. I can't imagine that would take more than 10 hours. Post picture please (in cad or in cura).

 

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Posted · 6 inch cube - 79 hour print!

I decided to be a bit more clever and spit the model. As this is only for a very alpha design test I don't need a solid part. I'll print many fronts and a single back, with a sliding join. First front is coming out out, 7 hours. Printing at 0.2, 60mm sec at 220.

 

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Posted · 6 inch cube - 79 hour print!

Good on you, the world needs more bees!

Also, why not just make it a cylinder instead of a box? The important stuff is inside the cylinder anyways.

 

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Posted · 6 inch cube - 79 hour print!

I think you only need 2-5% infill for a model like this. Would save a lot of time.

 

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