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Feb 2015

Ok, so something that earlier I got to work without any problem, suddenly I can’t get done.

I’m trying to print a smooth Nut & Bolt print on my Ultimaker 2 for a customer and these are my results

The 4 Prints I’ve done, Not in logical sequence, the far one on the right is highest temperature (210), the 2nd on the left is lowest (190). Optimal temperature for this filament (colorFabb) seems to be around T=200 C.

Clearly not good enough. I’ve played around mostly with Temperature and Print Speed, all without succes. I just can’t seem to find the “button” for this one. Help would be much appreciated.

Thanks!

Filemon

The is material missing, either is going to fast or not extruding enough material. Gradually increase Material extrusion, keep layers at 0.1mm

Heya,

At first glance, I would recommend slowing down the print speed. The 200 temperature seems about right. Whats the layer height and fill density? Is this sliced with Simplify3D or Cura?

Threads were my very first project for my 2X,first of , ( my reference is Makerware 2.4) how large is the ‘zipper’- the location where the layers start/stop.As I understand now, the great slicers have a “vase” setting, which is a spiral toolpath, eliminating this zipper. ( I’m also assuming this project is the M10X1.6 thread, downlooaded- a great test piece, but as we get down to say 1/4-X20’s Standard threads, the pitch minor and maximum diameters need to be played with a lot. It is easy to get AAAA status aircraft bolt status on the ID because of the shrinkage. generally a .015 " tolerance is fairly close for a start point. ( I’m talking the parent CAD Ffile now. more later! Johnny

Hello Filemon!

Are the active fans running? The ones that shoot air to dry the filament as soon as it comes out of the extruder? It has happened to me with our Makerbots.

Have a great day!

Claudia and José

+1

For PLA, if you have a clean print except for overhangs (threads) the issue is usually either extruder temp (too high) or it needs more fan.

Succes! Thanks everyone for the tips. All very helpful. Especially @Original was right about not enough material coming through. Put material flow on 150% and speed down to 75% which made it work. Surprisingly, higher resolutions only made things worse, not sure why that is. Thanks again everyone!

It fits, very “heavy” to screw though. I expect the higher material flow, resulted in decrease of tolerance. This would make it more difficult to screw on. maybe I’ll try another one soon with 125% material flow, see what that does

Good to hear you have a “AAAA” set there! now is when not as much your settings, ( play if easy)- me not so much- 4 big steps!- anyway- a micrometer and a CAD guy goes to ‘werk’- your probably getting an 80+ % engagement.75% is the ‘standard’ for metal threads, my first project was running with about 20%, and a radiused pitch profile.I’ll get more info on the threads later- bed time!:smiley: Johnny