1 Topic by Acidhouse

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Topic: Davinci Jr Filament issue

I've seen some similar post but my issues are slightly different and I don't want to hijack anyone's thread.

We set up our dvjr tonight. After following the tutorial process we got to the "print sample" process. The first attempt looked to be a heart shaped locket but it was not all the way printed. We tried a second attempt and it was only the outline. From that point, the filament has stopped coming out. I have tried the "load filament" option and where the first two times it streamed a string, these last few times have been nothing. My initial thoughts would be a clogged nozzle, (hard to believe as it hasn't actually printed anything yet), a temperature problem, or something with the loading. Any help is greatly appreciated.

Thanks

2 Reply by scobo

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Re: Davinci Jr Filament issue

What extruder temp are you using and what type of filament is it ?
It may be that you need a higher temp to extrude this particular filament properly.

Davinci 1.0 with repetier firmware & E3D V6 Lite
Anycubic Photon DLP printer, Einscan-S 3D scanner
Simplify3d, 123D Design, Meshmixer
http://www.thingiverse.com/scobo/designs

3 Reply by Acidhouse

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Re: Davinci Jr Filament issue

The filiment is from the spool that came with it. The temp rises to 205c.

4 Reply by chemist6.02e23

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Re: Davinci Jr Filament issue

I am a newbie, but I just set up a dvjr that I got for Christmas. I had a similar experience. It turned out that the z-offset was set to zero, so there was not enough clearance between the extruder nozzle and the printing surface. I don't know why you are not getting any plastic in the load filament procedure. Perhaps you can unload and then reload.

Good luck. I have gotten some nice prints from objects at thingiverse, after printing the heart-shaped pendant.

5 Reply by Acidhouse

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Re: Davinci Jr Filament issue

chemist6.02e23 wrote:

I am a newbie, but I just set up a dvjr that I got for Christmas. I had a similar experience. It turned out that the z-offset was set to zero, so there was not enough clearance between the extruder nozzle and the printing surface. I don't know why you are not getting any plastic in the load filament procedure. Perhaps you can unload and then reload.

Good luck. I have gotten some nice prints from objects at thingiverse, after printing the heart-shaped pendant.

Thanks. I googled some of the issues and saw the issue with the z-offset. Mine was set at .9mm from the factory and I went ahead and changed it to 1.2mm, however, I don't think that was the issue. On the initial set up, it had a small stream on the load mode. I did the load mode again and it had a steady stream. Both times, the stream stopped in the build mode. After the second try, it wouldn't stream in the load mode.

6 Reply by chemist6.02e23

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Re: Davinci Jr Filament issue

Just thinking out loud: is there anything that would interfere with the filament feeding into the extruded, some binding or extra friction? From your earlier post, I infer that the temperature stays above 200 degrees. Why would it be different during the build than in load mode?

7 Reply by Acidhouse

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Re: Davinci Jr Filament issue

Acidhouse wrote:
chemist6.02e23 wrote:

I am a newbie, but I just set up a dvjr that I got for Christmas. I had a similar experience. It turned out that the z-offset was set to zero, so there was not enough clearance between the extruder nozzle and the printing surface. I don't know why you are not getting any plastic in the load filament procedure. Perhaps you can unload and then reload.

Good luck. I have gotten some nice prints from objects at thingiverse, after printing the heart-shaped pendant.

Thanks. I googled some of the issues and saw the issue with the z-offset. Mine was set at .9mm from the factory and I went ahead and changed it to 1.2mm, however, I don't think that was the issue. On the initial set up, it had a small stream on the load mode. I did the load mode again and it had a steady stream. Both times, the stream stopped in the build mode. After the second try, it wouldn't stream in the load mode.

Actually, I have been wondering if the temp is staying at that temp. I notice that it goes up to 205c at the load mode but if I immediately go to build mode, it's dropped about 50c in temp and has to heat back up to 205c.  That may be normal. I don't know.

8 Reply by Sethl

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Re: Davinci Jr Filament issue

I'd go ahead and run through a nozzle clean in the utility menu.

If the z-axis is set too low, the nozzle will move through the extruded plastic and it will build up in and around the tip.

9 Reply by Acidhouse

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Re: Davinci Jr Filament issue

Well I think I have figured out the issue. Unfortunately, I don't think I have a way to open up the extruder to see if I can fix it. I just uploaded this to YouTube. I'm guessing this shouldn't sound like this.

http://youtu.be/gNTd5meym6k

10 Reply by Acidhouse

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Re: Davinci Jr Filament issue

Okay. It works. I took the extruder apart and reseated the silver guide piece. I still had a lot of problems but finally figured out that there was an old strand of filiment that wasn't letting me reload the filament. Once I got it out and reloaded the filament. I built the sample.

http://i299.photobucket.com/albums/mm318/Alabama1995/4A5E70CE-B6F6-4CB6-8CDC-5DADB77063A7_1.jpg

http://i299.photobucket.com/albums/mm318/Alabama1995/1EADE9E0-7727-4B0C-905E-3C45F798A5D8.jpg

http://i299.photobucket.com/albums/mm318/Alabama1995/D7C22ED1-606C-45A1-A9DE-679399FCD375.jpg

http://i299.photobucket.com/albums/mm318/Alabama1995/880A1225-266F-49B8-A049-8A36BA855E7A.jpg

11 Reply by DocD7

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Re: Davinci Jr Filament issue

Just an FYI - Extruder temp for the Jr. is set at 190C. When first heating up for a build, the heater overshoots to 205C-215C but rapidly cools to ~190C. Mine seems to run at 191C the whole time once it starts printing. Also, there is no way to change the extruder temp on the Jr. The temp is actually set by the NFC card inside the spool.

12 Reply by Rob68 (edited by Rob68 2016-01-09 21:44:34)

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Re: Davinci Jr Filament issue

any tips on cracking the extruder case open? I just removed it and the screw that feeds into the funnel came detached, so now it's loose in the case....ugh, so frustrating!

Update: I got it open...I was hoping to see some minor clog, but it looks all clear...I'm changing out the black stoppers (don't know the correct terms) to see if the fit will tighten up

13 Reply by Acidhouse

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Re: Davinci Jr Filament issue

For anyone else who asks, just take a small screwdriver and put light pressure on the black tabs.  It should open up.  Don't put too much pressure as you can break the tabs off.

14 Reply by betmeup (edited by betmeup 2018-08-28 12:30:08)

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Re: Davinci Jr Filament issue

The most problems are the feeder spring and the temperature.

When you are using a soft filament, then it is squeezed and it will clog the extruder. So you have to reduce the spring force, or you have to use harder filament.

The feeder "Clicking" sound is generated, when the temperature is to low while you are using "hard" filaments. You have to use higher temeratures (225°C).

It took me two years to understand that.

15 Reply by Buruko

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Re: Davinci Jr Filament issue

If your using the XYZ filaments should you really have to do all this adjusting?

16 Reply by Bozotclown1970

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Re: Davinci Jr Filament issue

What I did when my filament feeder started causing me trouble was to replace the feeder, no more problems.