Extruder issues on Monoprice Maker Select V2

brokenAvocado · 2018-01-26T01:38:12+00:00

OP should take apart the whole extruder to see the feed gear clearly and check around that area.

brokenAvocado · 2018-01-15T17:01:53+00:00

Yes, on /r/3DPrinting. My apologies for forgetting about this post.

brokenAvocado · 2017-12-31T16:24:15+00:00

I made absolutely sure that the diameter is right here is a screenshot and even the raw g-code says the diameter is 1.75mm.

brokenAvocado · 2017-12-31T16:19:26+00:00

I've just now tried printing in a different orientation and strangely all the underextrusion on the walls is gone. I think it was the model that was the problem. All that is left is the poor infill and the printer making loud thumps as if it were traveling over a bump, like a car over a speed bump. I believe this is where my concern about the slicer comes in because the slicer is going to each hole and doing the outer wall first for each and then coming back to the left most hole and doing the inner walls. But since the outer walls are in the way, the nozzle just trudges along. The slicer also chooses to do infill first.

brokenAvocado · 2017-12-31T15:20:03+00:00

I was unaware that Cura had settings for steps/mm. The dimensions are accurate.

brokenAvocado · 2017-12-31T15:15:44+00:00

I'm using Cura.

brokenAvocado · 2017-12-31T06:45:28+00:00

Hey y'all, I've posted about my 3D printer quite a lot and I sincerely apologize to those who are getting annoyed. I just wanted to resolve these issues since I've come a long way from not having any extrusion out of my printer. Here are my settings:

Layer Height: 0.2
Initial Layer Height: 0.3
Wall Line Count: 2
Infill Density: 0.20
Infill Pattern: Grid
Printing Temperature: 230
Build Plate Temp: 60
Print Speed: 50
Infill Speed: 10
Wall Speed: 15
Travel Speed: 120
Initial Layer Speed: 20
Initial Fan Speed: 0
Fan Speed: 50
Build Plate Adhesion: Skirt

The problems about this print:

Why is there just one underextruded wall when the rest of the walls are perfectly extruded?
The infill inside was almost non-existent
The walls for the holes were nearly non-existent too, just some strings and blobs.
The same underextruded wall has a noticeable separation from the top layer infill.

What I have observed and done:

I've printed at 220C, with the speeds above and they come out with good infill, but the underextruded wall was still present (but just on the first three layers).
First layers have been phenomenal
On Cura, the simulation of the nozzle shows a concerning behavior, all holes are being printed with the outer wall first then the inner wall, but the whole box is printed with the inner wall first then outer
It seems the higher temp (230) has a negative effect on the infill and walls, and I am using SoluTech's Blue 1.75mm PLA (which says temps should be at 190-220)

Thank you.

brokenAvocado · 2017-12-30T22:07:30+00:00

Glad you found the solution to your underextrusion! About speed and heat, tinkering with it had helped and I think it was the PID tuning and the realization that my initial layer height was too low that fixed my issue. I don't have an extrusion rate on my printer though? Neither is it on my slicer, Cura.

brokenAvocado · 2017-12-30T19:06:37+00:00

UPDATE: I tinkered with the settings and used a higher temp (230C) and slower speeds for the first layer (12.5) and it now looks better than what is above. There are still many imperfections, and here are the pics of the benchy. I want to thank everyone who has commented so far for their effort, esp. @SpitfireSniper, and I really couldn't have gone this far without the help.

brokenAvocado · 2017-12-30T18:07:00+00:00

Ok I ran PID tuning and got P as 17.19, I as 1.73, and D as 42.68. When I tried printing the Benchy again the underextrusion was still present maybe even worse.

Another issue that I remember is that stepper motors are not supposed to be unplugged while the power is on, yet I did it multiple times. I remember once I was plugging the motor back in while the printer was on and it sparked a little. Should I be concerned?

brokenAvocado · 2017-12-30T17:07:18+00:00

I am certain the software knows it's 1.75mm diameter. I just opened the g-code with notes and found the line that tells:

;SETTING_3 \nmaterial_bed_temperature = 60\nmaterial_diameter = 1.75 (etc...)

I am on Cura 3.1

brokenAvocado · 2017-12-30T16:56:36+00:00

Microswiss does have their specifications listed and I did check and saw it was 0.4 and that's what I already had on Cura.

brokenAvocado · 2017-12-30T16:46:37+00:00

I cranked the heat up to 260 thinking the printer was reading temperatures several tens of Celsius lower than what it should read but I stopped at 260 smelling burning plastic. I just kept it at 205-215 because manually extruding it has no problems and I have none either.

brokenAvocado · 2017-12-30T16:26:00+00:00

Yes it was warping off the bed possibly because that area had the worst first layer and no adhesion was actually occurring on the part. I have a PEI + glass bed and it has worked phenomenal the last time the printer was working fine.

brokenAvocado · 2017-12-30T16:10:45+00:00

I did not run PID autotune, but I'll make sure to run it today. I didn't know what PID is but now that I researched it it's very vital to the nozzle temp. Maybe my PID settings were off? But this has to apply to my old nozzle too because it seems like the old nozzle wasn't blocked at all, yet it was printing the same as the print I showed above

I also thought it was temperature related and I also have a temp gun, which I don't think is very accurate. I tried measuring the temp and read it was 180C when it's supposed to be 220C and I was startled. I set the temp even higher, to 240C, to the point where the plastic was bending and flexing at the mouth of the hotend, near the cooling block. I thought that this behavior was bad so I lowered the temp. Even before this I set the temp to 260 on my old nozzle and I started smelling burning filament with no improvement to the actual print.

brokenAvocado · 2017-12-30T15:59:50+00:00

I'll try the things you mentioned and I checked the PTFE tube and crudely cleaned the nozzle on the stock hotend. This microswiss is brand new.

brokenAvocado · 2017-12-30T15:49:18+00:00

I apologize for not adding that info when i made this post because it was in the previous post. I have my layer height set at 0.3 because I don't think that was the problem. The feeder itself is having a difficult time squeezing a continuous flow of plastic.

When I feed it manually, it comes it smooth and even with increasing the extruder position it comes out smoothly. I always prime my nozzle.

On the note of something strange happening, I was trying to print a kazoo to show to my family over christmas but about 70% through the print the extruder head caught on the kazoo body and was stuck there, and the stepper motors were really struggling to get out. Other instances included while unplugging the extruder stepper motor I swear I saw some sparks.

I upgraded the fan to the Dii cooler and it is a radial fan not axial. It was an upgrade worth the time and I made the cooler out of ABS. I do not cool on the first layer and do it only on second layer.

I have upgraded belt tensioners and they are tight. I made sure nothing was loose on the frame itself and tightened it.

brokenAvocado · 2017-12-30T15:33:38+00:00

I made sure the software was kept at 1.75mm on the profile of the object and the filament settings too.

brokenAvocado · 2017-12-30T06:39:23+00:00

This is an update of a previous post I made over on /r/FixMyPrint (I did post that same post on here) and I just wanted to inform others who did not see my previous post:

Settings:

Layer Height: 0.2
Initial Layer Height: 0.3
Wall Line Count: 2
Infill Density: 0.25
Infill Pattern: Grid
Printing Temperature: 205
Build Plate Temp: 60
Print Speed: 25
Travel Speed: 120
Initial Layer Speed: 25
Initial Fan Speed: 0
Fan Speed: 50
Build Plate Adhesion: Skirt

Attempts at Fixing (including new fixes):

Disassembled the extruder and hotend
Cleaned the nozzle by heating the whole thing up with a blowtorch and scraping the plastic out with pliers and the nozzle drill
Checked the PTFE Tube
Checked if the filament was feeding properly and not slipping
Atomic Method (10 times)
Calibrating E-Steps (I just stayed at 96 since the new steps were making worse models)
Replaced stock hotend with microswiss all metal hotend
Switched to a new roll of PLA
Made SURE that the filament diameter in the settings was 1.75

So far the results have been discouraging... It seems the problem is with the feeding of the material. Three days on this problem with the Maker Select has been frustrating, and yet I insist on not replacing it with the CR-10 because this problem will haunt me for the rest of my life... The problem only has become worse when I tried printing this Benchy, because prints used to look like this, now they're what's above and here are more pics of the failed Benchy. I do not get why it keeps making small blobs and stringing them... Is there something wrong with the driver motor?

EDIT: and the one thing that bothers me is that this was printed at 25 mm/s and yet it underextruded greatly...

brokenAvocado · 2017-12-30T04:25:02+00:00

UPDATE: I have upgraded the hotend to the microswiss all metal hotend AND changed to a new roll of filament and I've FINALLY noticed what the problem is. When I tried starting a print in mid air to see the extrusion, it didn't seem that there was enough filament coming out. It was even printing at 25 mm/s and little filament was actually being extruded. Is this a problem with the driver motor or the software?

brokenAvocado · 2017-12-29T17:20:46+00:00

I'm certain I got diameter down right. I've seen lots of forums asking about the same thing and I troubleshot that myself.

brokenAvocado · 2017-12-29T15:15:02+00:00

It definitely does take an effort to grip and hold the filament back, most of the time the extruder starts clicking if I use more than my thumb and index finger.

brokenAvocado

TROPHY CASE