Hallo everybody, I currently have a Problem with my Mendel90 from nophead after having really problems after printing Laywood. Let me tell the story: Due to the fact that my girlfriend wants to have name signs made of Laywood D3 for our upcoming wedding, I gave Laywood a try. Before that I only printed with Faberdashery and only had the common problems one coud have in a cold cellar. (Warping on the side facing the door, etc). I printed the signs at 180-240 degrees and made the terrible mistake to wait for the extruder to reach the temperature. After several failed prints I gave up and tried to flush the whole hotend with the original supplied green PLA. I don't know what went wrong, if I was too slow, if I used a too high temperature,... nevertheless the PLA got stuck in the COLD end! That's why I had to pull the J-Head apart and remove the stuck PLA with the help of a hot copper wire i stuck in the PLA and a cup of hot water. After the removal I put the whole thing together, cleaned the hobbed bold and inserted PLA filament again. Now here is the problem: When I heat up the PLA to lets say 185C and extrude it, it comes out with no problems. But if I try to print, the first view layers with 3mm height looks more like a 0.05mm height and an infill more like a field of tiny little dots. About the second or third layer all gets to the normal state , maybe even more filament is coming out then normal. I tried to flush the whole system again, but couldn't improve it. Suprisingly the retracted filament does not have the normal shape of a dot, it is more like a long long string, sometimes with dots. That's why I am thinking I ruined my hotend. Is there any way to fix it? (I ordered some drills with 0.3mm diameter but they didn't arrive yet and that's why I cant say that poking may be an option) I really woud appriciate your help Regards Christoph https://reprap.org/forum/read.php?292,458588,458588#msg-458588 Tue, 08 Sep 2026 23:45:49 -0400 Phorum 5.2.23 https://reprap.org/forum/read.php?292,458588,459132#msg-459132 https://reprap.org/forum/read.php?292,458588,459132#msg-459132 sguzzel Mendel90 Thu, 22 Jan 2015 15:52:32 -0500 https://reprap.org/forum/read.php?292,458588,458644#msg-458644 https://reprap.org/forum/read.php?292,458588,458644#msg-458644 Really good news ;)

I keep you all informed]]> sguzzel Mendel90 Wed, 21 Jan 2015 17:12:21 -0500 https://reprap.org/forum/read.php?292,458588,458600#msg-458600 https://reprap.org/forum/read.php?292,458588,458600#msg-458600
Note this can cause overpressure that causes the hot end to leak.]]> nophead Mendel90 Wed, 21 Jan 2015 15:47:35 -0500 https://reprap.org/forum/read.php?292,458588,458588#msg-458588 https://reprap.org/forum/read.php?292,458588,458588#msg-458588
I currently have a Problem with my Mendel90 from nophead after having really problems after printing Laywood. Let me tell the story:
Due to the fact that my girlfriend wants to have name signs made of Laywood D3 for our upcoming wedding, I gave Laywood a try. Before that I only printed with Faberdashery and only had the common problems one coud have in a cold cellar. (Warping on the side facing the door, etc).
I printed the signs at 180-240 degrees and made the terrible mistake to wait for the extruder to reach the temperature. After several failed prints I gave up and tried to flush the whole hotend with the original supplied green PLA. I don't know what went wrong, if I was too slow, if I used a too high temperature,... nevertheless the PLA got stuck in the COLD end! That's why I had to pull the J-Head apart and remove the stuck PLA with the help of a hot copper wire i stuck in the PLA and a cup of hot water. After the removal I put the whole thing together, cleaned the hobbed bold and inserted PLA filament again.
Now here is the problem: When I heat up the PLA to lets say 185C and extrude it, it comes out with no problems. But if I try to print, the first view layers with 3mm height looks more like a 0.05mm height and an infill more like a field of tiny little dots. About the second or third layer all gets to the normal state , maybe even more filament is coming out then normal. I tried to flush the whole system again, but couldn't improve it. Suprisingly the retracted filament does not have the normal shape of a dot, it is more like a long long string, sometimes with dots.
That's why I am thinking I ruined my hotend. Is there any way to fix it?
(I ordered some drills with 0.3mm diameter but they didn't arrive yet and that's why I cant say that poking may be an option)

I really woud appriciate your help

Regards

Christoph]]> sguzzel Mendel90 Wed, 21 Jan 2015 15:24:52 -0500