Bad Prints

[noname117]

Recently I installed a HE280 hot end on my Rostock max V2 and have yet to get a good quality print out of it. It consistently seems to mess up on the top layers regardless the settings i use in Mattercontrol.

Here's a link to a picture of a recent print: https://www.dropbox.com/sh/6gtuk5awz274 ... MnMza?dl=0

[thechewiestbacca]

Regarding the photo, is that print finished?

[noname117]

Regarding the photo, is that print finished?

The middle section is in the photo. Ill add more examples when i get out of class today.

[Khayrisill]

Hi,

It can be quite a lot of things...
I dont know what plastic your extrude and the temp of printing.
Maybe you should check the step of your motor's extruder, and the temp at the hotend with a thermocouple.

[noname117]

Hi,

It can be quite a lot of things...
I dont know what plastic your extrude and the temp of printing.
Maybe you should check the step of your motor's extruder, and the temp at the hotend with a thermocouple.

The hot end and temps appear to be correct when i check them with my IR thermometer also extrusion seems to be working fine when i manually push the filament.

I've been printing in PLA with the following settings in MatterControl:
General
Layers/Surface:
Layer Height: 0.2mm
First Layer Height 0.3mm
Perimeters: 5
Top Solid Layers: 5
Bottom Solid Layers: 5

Infill:
Fill Density: 90% (Heavy)

Speed:
Speed for infill: 65 mm/s
Speed for Inside Perimeters: 50 mm/s
Speed for Outside Perimeters: 30 mm/s
Speed for Travel: 100 mm/s
First Layer Speed: 15 mm/s

Raft/Priming:
Loops: 2
Distance From Object: 3 mm (Standard)
Minimum Extrusion Length: 5 mm

Support Material:
Generate Support Material: off (unless its needed for a print)
Support Type: Lines
Amount: 40 (Custom)
Pattern Spacing: 2.5 mm
X & Y Distance: 1 mm
Z Distance: 0.15 mm
Support Everywhere: on

Single Print:
Spiral Vase: off
Bottom Clip: 0 mm
Layer(s) to Pause: ________

Filament
Material:
Diameter: 1.75 mm
Density: 1.24 g/cm^3 (PLA)
Cost: $29 per kg

Temperatures:
Extruder Temperature: 210 C
Extruder Wipe Temperature: 0 C
Bed Temperature: 60 C
Bed Remove Part Temperature: 0 C

Retraction:
Length on Move 2.5 mm
Speed: 100 mm/s
Z Lift: 0.5 mm
Minimum Travel Requiring Retraction: 5 mm
Minimum Extrusion Requiring Retraction: 0.5 mm

Cooling:
Minimum Fan Speed: 60 %
Maximum Fan Speed: 100%
Disable Fan For The First: 2 layers
Slow Down if Layer Print Time is Below: 30 Seconds
Enable Extruder Lift: off

[Axlspinedoc]

Looks like underextrusion to me
try to lower all your speeds to 40mm/s and increment you temperature for 5°C. Once you get the correct amount extrusion speed thing a little up.

Also if you are using H280 check the bowden tube inside the extruder! If the hose isn't well put until the bottom of the extruder molten plastic will begin to leak into the gap, giving you a partial blockeage of the extruder. Always remove and reinsert your tube @ 210°C to ensure proper insertion

[Khayrisill]

Check your extrusion multiplier, and your filament diameter. You put 1.75 mm that's correct ? Have you measured ?
If it's less and if you let the extrusion multiplier to 1 you can have underextrusion

[thechewiestbacca]

Do you hear "clicking" or "popping" coming from the extruder when you print?
Also, try telling MatterControl to extrude 100mm of filament. Measure the strand that is produced. If it is less than 100mm, then you might have a clog, in the heat sink/break. Or, something might be screwy with your extruder.
My last suggestion would be to increase the flowrate during a print. Not sure if you can do that in MC, but I know that you can in Repetier.

[IMBoring25]

The heat sink/break should not be in the filament path when calibrating the extruder drive (unless you remove the nozzle, which would be more trouble and have a less accurate result than removing one end of the Bowden tube). Extrusion is controlled at the drive, and a longer extrudate will always come out of the nozzle since the molten filament is being squeezed to a smaller diameter by the nozzle.

[noname117]

Check your extrusion multiplier, and your filament diameter. You put 1.75 mm that's correct ? Have you measured ?
If it's less and if you let the extrusion multiplier to 1 you can have underextrusion

filament diameter is correct within + or - .01 mm. I obtained the number from averaging measurements across a significant length of fillament

[noname117]

Do you hear "clicking" or "popping" coming from the extruder when you print?
Also, try telling MatterControl to extrude 100mm of filament. Measure the strand that is produced. If it is less than 100mm, then you might have a clog, in the heat sink/break. Or, something might be screwy with your extruder.
My last suggestion would be to increase the flowrate during a print. Not sure if you can do that in MC, but I know that you can in Repetier.

There is no clicking or popping with the extruder and its extruding the correct lengths of filaments which indicates there is no clog.

[noname117]

Looks like underextrusion to me
try to lower all your speeds to 40mm/s and increment you temperature for 5°C. Once you get the correct amount extrusion speed thing a little up.

Also if you are using H280 check the bowden tube inside the extruder! If the hose isn't well put until the bottom of the extruder molten plastic will begin to leak into the gap, giving you a partial blockeage of the extruder. Always remove and reinsert your tube @ 210°C to ensure proper insertion

The tube is inserted properly and there doesn't seem to be any blockage in the extruder since it extrudes fine when i tell mattercontrol to extrude 100mm of filament. Lowering the speeds helped significantly though. Thank you

[noname117]

The heat sink/break should not be in the filament path when calibrating the extruder drive (unless you remove the nozzle, which would be more trouble and have a less accurate result than removing one end of the Bowden tube). Extrusion is controlled at the drive, and a longer extrudate will always come out of the nozzle since the molten filament is being squeezed to a smaller diameter by the nozzle.

The problem doesn't seem to be with the extrusion calibration since it is extruding properly when not printing.

[thechewiestbacca]

Just curious, what brand of filament are you using?

[noname117]

Just curious, what brand of filament are you using?

The stuff shown is some white PLA that i had laying around from a brand called Argos on amazon. It is the only spool of white PLA i had.

[thechewiestbacca]

Well, the amazon reiews for this brand of PLA suck. I'm not sure if this makes a difference or not, but I've had some brands that work better than others. Have you ever tried a different brand or spool?

[noname117]

Well, the amazon reiews for this brand of PLA suck. I'm not sure if this makes a difference or not, but I've had some brands that work better than others. Have you ever tried a different brand or spool?

I'm sure the filament great by any standard but it was the only white PLA i had laying around and I have been able to get decent prints with it before.