[Under extrusion while printing on Ultimaker 3]

Okay. They came out great!

 

no warping. No caving. Perfect extrusion. 

 

Ill add photos after some exams. I’m leaving them in the lab for other students to look at (I know they probably won’t). 

 

I think ill I’ll need to lower the horizontal expansion to around -.20

 

what factors affect horizontal expansion?

[Under extrusion while printing on Ultimaker 3]

I was basing the decision off this: https://ultimaker.com/en/resources/22229-how-to-print-with-ultimaker-cpe

 

I also used a brim. 

 

Since I'm going to try to fit all this parts together with dynamic movement I’m really just trying learn how to prevent both. 

 

We also use wolfbite - which is supposed to make better adhesion than just stick glue. 

 

Either way, they take my student fees no matter how much I use. 

[Cura updates delete custom profiles]

The update didn't change my settings. I wonder if it is OS specific. I'm running W10 on a lenovo thinkpad.

 

I also allowed it to uninstall the previous version.

 

My extensions are also still present, though I have no idea if they work (I've never actually used them  )

[Under extrusion while printing on Ultimaker 3]

ROUND 3.

GO.

 

Adjusted the build plate down to 70C, and the first couple layers at 80C.

 

Added a brim - just in case.

 

Lowered infill back down 20% - I'm kind of green.

 

Turned fan to 1% - I assume there is a fan...

 

Adjusted the horizontal expansion to -.25 (that's the hole the little knub fit into the most snug without taking a mallet to it. I was using the same printer for consistency, but apparently I can't use the force to convince the other thousand qualified students from using it :(

 

Update with photos & results tomorrow.

[Under extrusion while printing on Ultimaker 3]

Nothing broke. They were solid as I wanted. I just figured that since I’m going to give a third run I’d cut one to check that internal structure had also improved. I would have used a bandsaw for a cleaner cut, but they won’t let me into the wood shop without a partner. 

 

Thanks for the advice! 

[Under extrusion while printing on Ultimaker 3]

Update:

 

Settings:

30/30/20 mmps speed

250C print temp

80C plate temp

.15mm height

30% infill

grid

 

I really should have came and paused the print in the middle to see if the infill printed better... things to do next time, but for now - DESTRUCTIVE TESTING!.

 

Anywho, walls are much more solid - meaning they are actually solid!

 

Though, I am now seeing some minor warping in the sides.

So, any suggestions to fix that.

 

Also, does anyone know what a "slope calibrator" is used for? Printing this thing over and over is really helping teach me how to manipulate the settings, but I have no idea what this part is supposed to show!

 

This is all I know, and I don't really understand it:

https://github.com/revarbat/snappy-reprap/wiki/v3.0-BOM

http://forums.reprap.org/read.php?2,556724

 

PS: Added cat tax; she's sophisticated.

[Under extrusion while printing on Ultimaker 3]

37 minutes ago, cjs said:

Like @gr5 said crappy looking infill is quite normal with the stock cura profiles as the speeds are way to fast. The walls are normally printed way slower and you shouldn't see any under extrusion in the walls like on your photos.

Therefore you may also want to check the feeder. Sometimes filament gets stuck and blocks the movement arm and therefore results in feeding issues. (Guide: https://ultimaker.com/en/resources/50688-clean-the-feeder) 

 

Considering it’s ran by students who couldn’t figure out how to read a spec sheet...

[Under extrusion while printing on Ultimaker 3]

I dropped the speed to 30/30/20 (speed, infill, wall) and up the temp to 250C.

 

I don't want to exceed the temp range that ultimaker has recommended, because I don't want to piss of the university's workspace supervisor

 

I'll update tomorrow (labs close before the print will finish).

[Under extrusion while printing on Ultimaker 3]

Yeah, I reviewed the spec sheet from Ultimaker and saw that it listed  The temp range as 235 to 250. 

 

The settings I used were just what the lab supervisor tells everyone to use as the default. Also, I’ve only used copolyester and I assume that’s all that’s been used, but it is a bank of 30 odd printers at a large public university. 

 

I think im going to drop the layer height to .15mm, slow the speed down to 30mmps and raise the temp to 250C. 

 

Im curious if there is a better infill than trianglular or grid. Grid is what the wiki project recommends, but I plan on using these parts for assembling another 3D printer, so I want things like gear drives to have good structural integrity (I’ll obviously use higher infill percents for those as well).

 

This is the project I’m working on: http://reprap.org/wiki/Snappy_3

[Under extrusion while printing on Ultimaker 3]

Printing a slop_calibrator_parts.stl from the v3.0 snappy reprap.

 

Material: CPE AA 0.4mm

 

Settings:

layer height: .2mm

speed: 60mm/sec

infill: 20% triangular

Print temp: 245C

Plate Temp: 85C

flow: 100%

 

Aborted midprint (for obvious reasons).

 

These are school printers, so it may be hardware.

 

Any solutions?