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Posted · small part

I have a small round pyramid shape 1/4" diameter x 1/4" tall.  The top tip is not coming out good?  Ive tried slow and fast.  pic is solid print.

DSC_1907[1].jpg

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Posted · small part

It's not getting enough time to cool.  I usually fix this by printing 3 or 5 of the object at the same time.  Right click on the part and select multiply.  If your fans are on the side then position the parts in a row left to right.  If your cooling fans are in the front or back then position the parts on a line front to back.

 

Alternatively you could print a small tower on either side of this print (that is at least as tall).

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Posted · small part

My standard pic to show the effect of a dummy cooling tower (ruler is in mm and cm).

 

In addition to what gr5 said, printing in thin layers, slow and as cool as possible also helps. Also, do not use 100% infill but rather 50% or less. But I could never totally get rid of the effect. At some point the hot nozzle just keeps sitting on top of the tiny model, preventing it from cooling down and solidifying. That is a limitation of this printing method.

 

DSCN5603b.thumb.jpg.83c20560cfab90d56590243bc6015f12.jpg

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Posted · small part

@meskan - geert is showing how the right 2 prints are better with towers but still not perfect.  In general, more towers is better - it gives the print more time to cool.  If you only do one tower, the printer will print that point on the model 2 layers before going to the tower and doing 2 layers. But if you load the tower first, then your model, then a second tower, then your print will only do one layer before going over to the tower and letting the print cool.

 

One can also lower the printing temperature.  I would think printing slow would be worse as the nozzle is heating the part more.  Fan is definitely your friend.  You can even use a desk fan to increase cooling.

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Posted · small part

much better!  Fan is on the front so I spaced 1 pc in the back to allow the fan to blow on the other 5.  There is a small about of clean up, but these will be usable,  Thx

DSC_1911[1].jpg

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Posted · small part

why is the filament coming out between the 2 back prints?

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Posted · small part

Another thing that might help, is when you keep sitting next to the printer. Then when it is reaching the top of the models, gently and gradually lower the flow-rate of the extrusion, via the Tune-menu on the printer (name might differ on your printer, depending on the model). Reduce flow-rate very gradually to 95% or 90%, try what works for you. Also, manually reduce temperature as it reaches the top; and here too: try what works for you. The shape will still not be good, but it will overextrude less.

 

My test demos were printed with about standard settings, thus way too fast and too hot for these tiny cones. But they do show the effect very well.  :-)

 

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Posted · small part

I can see you have an Ultimaker S5.  The front is a cooling fan only for the mechanics inside the head.  The fans that cool the part are on the sides.  So print the parts left to right and space them about the same distance as half the head width.  This will only help a little versus what you did but every little bit of cooling helps.

 

You can also lower the bed temp to 55C instead of 60C and lower the nozzle temp by at least 5C.  Maybe lower by 10C at the end.  The S5 tuning menu lets you lower up to 25C (versus default) live while you print.  geert_2 has good advice here.

 

Also keep the front doors open and print near the front edge.

 

Also white seems to be the most difficult color to print (all materials).  It has a huge amount of additives to get the color.  If you print in a darker color you might have better luck.

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