Failed print now printed parts just break apart

Having a problem? Post it here and someone will be along shortly to help
Post Reply
deadpool66
Printmaster!
Posts: 68
Joined: Tue Jul 26, 2016 8:19 pm

Failed print now printed parts just break apart

Post by deadpool66 »

Hi everyone!

So I have been trying to print this model paint holder http://www.thingiverse.com/thing:1000772. The first time I tried to print it the print became separated and giant blob formed.

I cleaned it up and tried again last night and it looked ok until I touched the print and could just about push my finger through it. The print is ultra fragile layers just pull apart. I printed with 30% infill with Simplify 3d.

Any ideas were to start?

Settings
Pla
Medium Quality
30%infill
190 hotend
60 bed

These settings have worked perfectly for everything I have printed thus far.
User avatar
Tincho85
Printmaster!
Posts: 659
Joined: Sun Nov 03, 2013 12:27 pm
Location: Buenos Aires, Argentina

Re: Failed print now printed parts just break apart

Post by Tincho85 »

If your layers won't adhere to each other I would try increasing the temperature.

Check this video, it's a good and simple test to do.
http://www.youtube.com/watch?v=POaL2GGBHGM
[youtube]http://www.youtube.com/watch?v=POaL2GGBHGM[/youtube]



Share a picture if you can, it could also be a partially clogged nozzle... or the layer cooling fans are too powerful... or you are printing too fast.
Martín S.
Qdeathstar
Printmaster!
Posts: 622
Joined: Wed Apr 13, 2016 7:42 pm

Re: Failed print now printed parts just break apart

Post by Qdeathstar »

I would also check to see if your extruder is blocked... After it is heated up extrude 10cm of filament a few times and make sure it extruders freely without any pesky clicks...
deadpool66
Printmaster!
Posts: 68
Joined: Tue Jul 26, 2016 8:19 pm

Re: Failed print now printed parts just break apart

Post by deadpool66 »

Discovered the ezstruder is grinding filament. Apparently this is common with the .35 nozzel.

What would fix this a fan or heatsink?
Xenocrates
ULTIMATE 3D JEDI
Posts: 1561
Joined: Wed Sep 23, 2015 2:55 pm

Re: Failed print now printed parts just break apart

Post by Xenocrates »

Some things can help with the issue:

Increase print temp (Except PLA, until you get to a slightly nuts PLA temp, it doesn't help_
heatsink/lower current to extruder stepper. Basically, you want to reduce the heat on the extruder motor.
Reduce printing speed.
Larger nozzle size

The name of the game is to make the properties of the filament match what's needed to move it. Increasing print temp, lowering speed, and a larger nozzle will reduce back pressure. The cooler extruder motor will keep the filament harder until it gets past where much of the strain is.

I personally like the Bondtech QR, which through having two drive gears, can side-step many of the issues, but it's not cheap. You might also have success with a higher spring force, or the EZR-struder, which is newly released from SeemeCNC.
Machines:
Rostock Max V2, Duet .8.5, PT100 enabled E3D V6 and volcano, Raymond style enclosure
Automation Technology 60W laser cutter/engraver
1m X-carve router

Sic Transit Gloria Mundi
01-10011-11111100001
User avatar
joe
Printmaster!
Posts: 275
Joined: Tue Jun 28, 2016 10:05 pm

Re: Failed print now printed parts just break apart

Post by joe »

You have set the slicer to a .35 nozzle?
deadpool66
Printmaster!
Posts: 68
Joined: Tue Jul 26, 2016 8:19 pm

Re: Failed print now printed parts just break apart

Post by deadpool66 »

Yep everything is set correctly in simplify 3d. Printed 4 large prints and no problem prior to last print that peeled up and wrapped around the hot end.. Noticed the hob was filled with pla shavings must have built up during the prints.

Waiting for a new hotend with .5 tip mayb this will fix the problem.
User avatar
joe
Printmaster!
Posts: 275
Joined: Tue Jun 28, 2016 10:05 pm

Re: Failed print now printed parts just break apart

Post by joe »

Isn't a .5 nozzle standard equipment with the kit? It was when I did mine.
deadpool66
Printmaster!
Posts: 68
Joined: Tue Jul 26, 2016 8:19 pm

Re: Failed print now printed parts just break apart

Post by deadpool66 »

I bought mine used and .5 tip was ruined so I threw the .35 on.
geneb
ULTIMATE 3D JEDI
Posts: 5362
Joined: Mon Oct 15, 2012 12:47 pm
Location: Graham, WA
Contact:

Re: Failed print now printed parts just break apart

Post by geneb »

The lower the nozzle diameter, the slower the print speed. For a .35, I wouldn't go much higher than 30mm/sec.

g.
Delta Power!
Defeat the Cartesian Agenda!
http://www.f15sim.com - 80-0007, The only one of its kind.
http://geneb.simpits.org - Technical and Simulator Projects
User avatar
teoman
ULTIMATE 3D JEDI
Posts: 1783
Joined: Sat May 24, 2014 5:43 pm

Re: Failed print now printed parts just break apart

Post by teoman »

If the print is a bit crunchy that indicates under extrusion.

I had that problem and needed so solve it fast. It was a bit complicated for me untill i found the cause.

Too much resistance extruding, if you cannot manually (by turning with your hand) extrude then you have a problem with the bowden tube or the nozzle.

I did not mess with the motor as i also ended up grinding the filament when spinning the knob on the extruder.

I increased the temp of the hotend to the max. This helped a little bit.

I put olive oil on the filament thinking that it was the bowden tube that was problematic. It did help a little (and my problems were appearing about 2-5 cm from the bottom of the print so i thought resistance in the bowden tube). You do not need to use any oil in the tube. Some do but the gurus do not recommend it. Olive oil does remove the paint/coloring/pigments from the filament. I dont use it anymore.

But the problems quickly reappeared. I switched to a bigger nozzle. Which only helped a little bit more.

Going much slower also helped a little bit.

With all of these i was able to get the parts done, they were still not really good. But with glue, tape, shit and shizzle i was able to use them.

Finally i took the hotend apart (standard seemecnc). And the piece of teflon tube inside the hotend had burned and was swollen. I replaced that with a new piece of tube (identical to the long bowden tube) and it started working again.
When on mobile I am brief and may be perceived as an arsl.
User avatar
teoman
ULTIMATE 3D JEDI
Posts: 1783
Joined: Sat May 24, 2014 5:43 pm

Re: Failed print now printed parts just break apart

Post by teoman »

Oh, measure your filament aswell.

Had the same happen when i was experimenting with factory reject filament, which suddenly increased in size to 2mm.
When on mobile I am brief and may be perceived as an arsl.
Post Reply

Return to “Troubleshooting”