I bought a weak ago e Velleman 3d Printer K8400. Right know he is finished, but when I will install him he did not work.
I’m at the step to fill the filaments. I insert the PLA and follow all the steps. Right know he did everything like in the steps, but the PLA is not came out my
printer.
What can I do ???
I think the printing head is broken. At the moment of calibration there goes something wrong. I had to set the print head to ± 1mm of the build platform. I did it and when I
give my 3d printer the comment : auto home , he presses the printing head in to my building platform. To stop this I must power off the 3D printer.
So I thing right know that it’s the head what is damaged.
Check the nozzle to see if the point has not been crushed when hitting the bed. You should see the tiny hole in the middle of the point. If not you can sand the point very gently until you can see it again. If you crashed the head in the bed you probably didn’t adjust the Z height correctly. After the build (if you followed the instructions), the bed must stop far away from the head when you perform the first auto-home. Only then you can adjust the Z calibration piece to get it progressively stopping at about 1 mm from the nozzle when performing an auto-home.
Thanks for the information !! I worked on it and finally he prints I’m a happy man already.
But I have 1 remaining problem where I can not find the solution for.
I draw my 3D products with Inventor. The products I draw are in mm and after they are done I save them as an .stl file.
When I load them in the vertex 3d printer repetier host my products are very small. It look’s like the scale is not correct.
I can not find out what is going wrong. Somebody with the same problem ?
Thanks a lot !!
Never used Inventor so I don’t know if it doesn’t save correct stl files. Anyway you can scale up or down your objects with Repetier. Usually when there is a scale issue on the saved file the ratio is 10 (10 times too big or too small).
Design a 2x2 cm cube in Inventor, export it as stl and load it in Repetier : each square in the grid is 1x1 cm so it’s easy to check the scale of your object.
When you use inventor and you export as an STL you can choos “OPTIONS” in the save menu (button next to save or OK) and there you can choose the unit of the export. You need to make sure this is the same unit as you used to draw the object in.
It looks great so I started printing. Also that goes great till know. In the next video you can see he suddenly print next to the object.
Why ? I don’t know. Have anybody an idea ??
[quote=“mich777”]In the next video you can see he suddenly print next to the object.
Why ? I don’t know. Have anybody an idea ??
[/quote]Typical layer shift. Your X/Y axis are probably not smooth enough and it suddenly blocks the movement. You’ll have to recheck the alignment procedure.
Thanks a lot, I hope I have fix it right know, so I done a new test.
Unfortunately I stoped the test because what I was printing rises up at 1 corner. Like you can see on the picture.
I stoped the printing job and clean up the plate so good as possible. Then I did an other test, but then he rises up at 3 corners.
Is there maybe something good to clean up the plate where you print on ? Or something that stick a little bit so it can rises up ?
Also what I noticed is that the cooler at the bottom is not cooling. Is that normally?
If you’re using PLA it shouldn’t happen unless your nozzle/bed distance is too high (0.2 mm is the max).
If it’s ABS it doesn’t stick very well on the buildtak and the cooling on.
[quote=“mich777”]Also what I noticed is that the cooler at the bottom is not cooling. Is that normally?[/quote]Do you mean the the bottom fan doesn’t kick in when the head is heating? If not check the wiring because it should.
thanks for all the information ! It helps me a lot !
Unfortunately there is a new problem with the printer. Last Wednesday he printed a part like it must be.
Right know I would like to print a new part, but there is something wrong with the printer. When I started the printing job
he started normally but there is nothing coming out of my printhead.
It looks like the PLA wire is returning while he would print.
I try to fix this with the option : control printer > unload fillament.
But when I do that it looks like he try to put extra wire in the printer instead of pulling the wire out of the printer.
[quote=“SlowFoot”]I think it heat up then extrude some before it unloads the filament.[/quote]Indeed it’s what it does.
mich777 it seems you have a clogged nozzle. Only way to solve that is taking the head apart. Easiest way is to remove the screws holding the PEEK tube in place : remove the lower screw from the front metal spacer and the upper screw from the rear spacer. Then cut the filament above the PEEK tube and unscrew the tube. Most probably you’ll see there is a small blob of filament just before the nozzle preventing the filament from getting through it.
Thanks for all the information. It helps me a lot. He works again and I’m printing again for ± 2 days.
But there still be 2 problems.
1: At some time it happened that the printhead moved wrong or is blocked somewhere. At that moment he print at the wrong position.
On the picture you can see that he printed at some point at the wrong position.
2: I still have problems with the problem that my PLA is rising up at the first layers. Maybe you can see it on the picture, but the bottom is not flat.
First off all the problems with the rising PLA is the biggest. I checked a lot if the bottom plate is ± 1mm under the printing head. Also it’s not directly but after a while it rises up. Especially it is the extra border that vertex 3D is draw by himself. The best I can do right know is to tape the edges of the borders. On that way he rises not so high and can I finished the printing job.
For the shifted layer I just fixed 1 of the drive belts where there was some backlash.
What I do a lot is clean the rods. In the beginning I put some oil in to the pulleys where the rods are inside. Because of that there was a lot of dirt on the rods so I clean it a lot with toilet paper.
It looks like the first PLA line is good, but when the second line comes over the first like it looks like the first line is shrinks to the second line.
It looks like the PLA is to hot and because of that the first layers goes wrong. He stands on 210 ℃
1mm is way too far off, you need to get it to about 0,2mm, so that it actualy pushes the first layer flat on the printbed. at the moment it’s putting a 0,35mm strand in the air because there is a large gap between the nozzle and the bed.
as for the temperature you are running too high i would say, i am printing PLA at 166, but there is a small test you can do to find the right temperature (test for each filament you have) youtube.com/watch?v=FSOPsRiiOZk
the video isn’t for the k8400, but it’s close enough
I just did a new test, but still the same problem. It looks like the PLA is sticking better right know.
But after some hours of running again some layers are shifted.
Is there any shop in Belgium who can help me with those problems ? Maybe that would be the best solution because I almost tested the whole roll of PLA, but still nothing that is printed like it must be.
And how can I know this ? It looks like I have ± 50% used of the roll, maybe a little more. I don’t think that it is a smart idea to unroll the roll and see how many meters I have.
2: What I found one of the biggest problems while I print is the open gabs. I give you this as an example.
I’m a happy man already.
