1 Topic by 09bowyerm (edited by 09bowyerm 2016-06-16 16:01:28)

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Topic: Guide tube comes loose mid print (Da Vinci JR 1.0)

Right then

Mid print, at random times, the guide tube connecting the feeder to the extruder comes loose, this can even happen during the loading process.

This causes my prints to lose quality and stops printing entirely in most cases

It comes loose at the feeder end.

I have checked the screws on the feeder and the extruder, and they are as tight as they will allow.

I have checked the tube itself and it's inserted as far down as it will go.

I did see that the feeder end of the tube appears warn down slightly, this is probably down to it slipping loose and scraping on the "teeth" inside the feeder, I thought that a solution will involve me cutting this section away, but my inexperience with 3D printing tells me this may not be the correct fix, and I am looking for the correct one, so please lend me your ideas as to if this will work or not.

2 Reply by 09bowyerm

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Re: Guide tube comes loose mid print (Da Vinci JR 1.0)

Update:

I removed the end of the guide tube, but it hasn't changed anything, the tube still gets "overloaded" and I have no idea why, I don't suppose anybody can help?

3 Reply by madeintaiwan

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Re: Guide tube comes loose mid print (Da Vinci JR 1.0)

The teeth suck to be honest.

The filament is pushing up which just pushes the tube off. I found out that literally swapping the ends (unscrew both, screw both into the other one) that the other side has much better teeth and the extruder side has way less pressure pushing out the tube.

4 Reply by 09bowyerm

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Re: Guide tube comes loose mid print (Da Vinci JR 1.0)

Thanks for the reply

But unfortunately it appears to've only moved the problem.

Filament can no longer load into the extruder for some unknown reason, it feeds it in but filament isn't fed through.
In some cases the issue reverts to what it was before, the tube comes loose and free from the extruder, instead of the feeder.

There are no obvious signs of it being blocked.

It feeds in fine but appears to simply overload it again, and does not convert any of it to anything feedable

The bolts are done up as tight as they will go

Any suggestions from anybody would be most apprecheated

5 Reply by kr15_uk

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Re: Guide tube comes loose mid print (Da Vinci JR 1.0)

@09bowyerm
Are you still struggling with tube?

If yes then continue reading, in not - never mind then.

1. Tube should be self lubricating effectively but that's not always the case, I've seen some filaments which are acting as a sponge and basically sucks all the moisture (aka lubrication grease) and that would prevent your filament from sliding through.
Fix. A bit of mineral oil rubbed into the filament before entering the tube should help. Some people actually has permanent clamp with the sponge soaked in mineral oil to clean micro dust from the filament and improve lubrication. So wouldn't harm by the looks of it.
But by the looks of it your problem isn't the tube, tube is just a weakest point.
2. Hotend. Have you printed recently with some wood PLA, glow in the dark or any other "fancy" filament? All those fancy filaments has some kind of a additives which may clog your hotend. To clean it just set it into the cleaning mode, remove the head, let it heat for 5mins and then poke it with thick rod from the top and those small ones from the bottom couple of times. When you think its clean attach bowden tube, take regular PLA and feed it through by manually pushing it in so it starts to squirt out melted filament. I usually use white PLA so it's easier to see when it's all clean coming out. Also as a a note, white filament if under the heat for longer period it will come out greyish, it's not dirt from the hotend but you being slow pushing it through! wink
3. Have you taken your hotend head apart?! 1st week when I received my Jr I was just printing and not really taking it apart. Then on the 2nd week when I disassembled it I found a big blob of melted filament under the bottom metal plate sitting there. Still don't know how it managed to get in there. Ever since I ran my Jr without all those covers etc.
But the whole story behind is that it covered all bottom of my hotend and thermistor as well. Hen I cracked all that PLA off I've realised that it managed to squeeze into the thermistor hole a bit so it could give wrong reading of temperature back to the printer.
And tube popping could be related to hotend not processing all the filament it get's pushed into and that causes tube to lift and pop out.

Sorry for the long winded reply.



So I would ensure it's all clean and

kr15_uk's Website

6 Reply by 09bowyerm

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Re: Guide tube comes loose mid print (Da Vinci JR 1.0)

Thank you for the reply, unfortunately it came just as the printer was sent back for a replacement.

I was printing with the default filament, none of that fancy stuff, so no issues should've come from there...

The printer was only a week old when I first got it so I doubt it's caused by some form of jam, that being said I never checked the hotend itself, (too scared, last thing I wanted to do was ruin the warranty or risk it), I only checked the extruder itself which yielded nothing unusual.

In fact, the printer hadn't even been printing for the 24 hours xyz claim is the time you need to leave before cleaning.

I blame the entire issue on the bolt holding the tube in failing or not digging in enough...
With the lack of part knowledge, or the parts being in poor quantity where I am, I sent it back where they have since replaced it.

...this will be the third printer sent out to me now...

regardless, cheers for all your help you lot, means a lot smile

7 Reply by hrgguy

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Re: Guide tube comes loose mid print (Da Vinci JR 1.0)

the same thing is happening to my printer. I haven't had it for 24 hours and on my first print, this happened. Did they send you a new printer? does the new one have the same issue?

8 Reply by CoolArts (edited by CoolArts 2017-01-17 21:48:39)

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Re: Guide tube comes loose mid print (Da Vinci JR 1.0)

I've been 2 days without being able to print cause this issue, now i'm printing since yesterday with no mayor issues.

I was looking crazy what can be happening, i completely dismounted the extruder and the noozle header, clean everything up very very good. But it didn't work.

After hours of meesing up i realize 2 things, if i choose the option load filament in the printer i observed that the filament flows correctly, without the guide been pushed out by the extruder. But once the noozle is on the bed, the problem begins.
At this point i realized that all can be cause by a wrong z-axis configuration causing the noozle being too close to the bed and causing a lower flow of filament, that translate on the guider being poped out from the extruder. I went to z-axis config and it was set to 1.75, i change it to 1.95/2.05. With that change i was able to print without a problem (doing my last hint on each print). I recommend you to find the better z-ax for your printer.

But... if you hit load filament and the filament doesn't flow correctly or even none existing flow, then you must unmount the noozle header, probably there's a little piece of filament blocking the noozle too up to get correctly hot causing a block on the filament path. This also happened to me this morning.

Also my last hint, i've done this too, is to extract the guide from the extruder and raise it's diameter a bit with something like a screwdriver, be careful to not raise it too much (you can deform the tooths inside the guider conector). And at the begining of each print you will see that the guide will come up a bit from the extruder, this happened to me in every print. If i leave that rise without pulling down the guide again for next print, then guide will pop out again. So every time i start a job now i push the guide to the extruder before begin.

I wish this can help you,
Best regards,
CoolArts.

Apologies about my spelling.

XYZ Junior/Mini Passwords Thread
If you are in a hurry and need your password NOW, or if it takes me too long for you, you can read the posts from 1851. I'm not going to be as effective as Bozo or Cgrillo, but you can give a try with me. If PASSWORDS thread follow it's current flow: asking for repeated passwords, not returning or false PACKS... I will end up with it as others before me.

9 Reply by CoolArts (edited by CoolArts 2017-01-23 18:34:49)

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Re: Guide tube comes loose mid print (Da Vinci JR 1.0)

CoolArts wrote:

I went to z-axis config and it was set to 1.75, i change it to 1.95/2.05. With that change i was able to print without a problem (doing my last hint on each print).

After a couple of prints the problem on the guide camed again. Found that the Bowden adapter over the extruder have completely loose the teeth ring. I'm sure this was caused by me for pushing in the guide into the adapter before each print, and some times at middle-print, but if not doing that i was unable to print... so finally it has broken.

Replaced the Bowden adapter, now i'm printing at 1.45mm Z adjustment. Now the problem only occurs with some particular models if i use high speeds, and sometimes low resolutions 300 or 400 microns, but ATM i didn't found more errors printing 100 or 200 microns resolution at Lower or mid-low speed.

Regards.

XYZ Junior/Mini Passwords Thread
If you are in a hurry and need your password NOW, or if it takes me too long for you, you can read the posts from 1851. I'm not going to be as effective as Bozo or Cgrillo, but you can give a try with me. If PASSWORDS thread follow it's current flow: asking for repeated passwords, not returning or false PACKS... I will end up with it as others before me.

10 Reply by lisa.booker

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Re: Guide tube comes loose mid print (Da Vinci JR 1.0)

How do you remove the top cover of the Jr printer? My Jr 1.0 Pro has a broken Feeding Tube Grip at the Feeding end (extruded end fine) and I can't access it without popping the casing off. Afraid to crack the casing. Very helpful tips - will purchase extra Grips from Amazon!

11 Reply by yizhou.he

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Re: Guide tube comes loose mid print (Da Vinci JR 1.0)

http://www.soliforum.com/topic/16985/da … top-cover/

(Da Vinci 1.0, Jr. 1.0 RAMPS, miniMaker) X4, (Creality CR-10S, CR-10 mini, Ender-3) X4, Anycubic MEGA X4, Anycubic Chrion X1, ADMILAB Gantry X2 (MonoPrice Maker Select V2, Plus, Ultimate)X4--Select mini X1, Anycubic photon X4, Wanhao duplicate D7 X1.
iNSTONE Inventor Pro X2, CTC Dual X2, ANET-A8, Hictop 3DP-11, Solidoodle Press, FLSUN I3 2017X1

12 Reply by drharishkumark

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Re: Guide tube comes loose mid print (Da Vinci JR 1.0)

I cleaned the nozzle end.

I oiled the filament.

Then I tried to fix the tube grip.

In the end, replacing the tube grip with a new one solved the problem for me.

The tub grip was worn out, and the teeth were a little loose. There was no way I could have fixed/ tigthened the teeth.

Thanks for all the tips. Helped me understand my 3 D printer a little more.

13 Reply by epsonmadrock

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Re: Guide tube comes loose mid print (Da Vinci JR 1.0)

heres the solution. i bought a mini maker  yellow and red. the filament broke while the machine was at a rest. due to the room temp getting below 70 degrees. i tried to contact xyz printing they jacked me off and all i got was nothing. i left my machine dorment for a week attempting to find the peace that has the plastic gromet and metal 4mm screw point that attaches to the top the the motor that connectes to the hose on the top right of the unit. it just so happens that every other machine but this product using similar parts but this machines part is almost impossible to find. so i thought about the issue its self. witch is the black gromet keep poping out... why because the lip of the gromet was slightly changed due to the machine malfunction. so heres the magic. take the plastic peace put it on the ground seperate from the metal part and take a hammer  make sure the larger diameter portion is on the ground and tap the hammer on the small end where the grove allows for attachment then pop the peace back into the metal peace and put you machine back together and that bitch prints baby... ghetto solutions for a bullshit product with no replacement parts...