I made my first 3D prints and everything was working great. However, now that I tried printing a larger item, I’m faced with the issue the bed level towards the front is not adhesing any filament. It looks like the bed level is too close to the nozzle. Coming to the level where I have the impression the nozzle is too close to the bed, the filament engine retracks the filament. Just like he is feeding it but because it’s blocked it is being retracked.
I already did the following;
Extra info, the issue apparently is only in some directions. When the nozzle is coming towards you, the quality is poor, going diagonal or away from you is going well.
Btw, I did some manual calibration as well (stored the settings) and there is no difference…
Did you turn the bed by some 60 degrees and get the same print effects?
[Bart] Yes, did that, same result
Is the bed really flat, I mean is it not somehow somewhere slightly more up?
[Bart] I measured it with a levelling tool both with and without the bed. Completely set (and calibrated + stored)
Did you cut the Buildtak overhangs away, so it is really flat on the sensors?
[Bart] Yes I did + as described in the manual I adapted one of the pinchers so it’s loose.
I already did the bed leveling as well.
Just tried something else so I could exclude the angle setting of the bed; If I place a tiny spacer on the sensor so the bed would angle down a bit, I got the same result. So there must be something else going on…
In the meanwhile, my BuildTak is getting completely ruined
If this can be solved, it would be perfect cause centre and upper 3D prints are perfect.
use of Oil (rods) and PTFE (magnets). I actually pretty much soaked them (but not too much - have a piece of paper ready)
coil the feeder like in STEP 8 - I didn´t do this properly and I really wonder why I didn´t do it (???) the first time - it might have contributed to my situation. I picked the printhead and turned it twice before connecting to the magnets.
Same here: my Buildtak was “hammered” several times (kind of 3-7 small dents in the surface towards one end of the bed when the Auto leveling was executed). Once the rods and all other items above had been done, it didn´t do it anymore. So I assume this happens only when something goes wrong.
This was my first strange situation and I only realized this when I did a wide print and the initial BRIM was made - when suddenly the nozzle lifted on one axis.
Really appreciating your help but unfortunately none if it is giving me the Euroka moment. I checked and tried everything; Rods, pulleys, feeder and calibration…
As long as I stay in the center and up all goes well. The moment it touches the lower part it’s going wrong when the nozzle is moving towards me or to the right.
Oh, man, I am so sorry. I struggled as well: my Buildtak looks like a battlefield meanwhile (or sort of), but I believe my “non-adhesion on first layer” seems to be a combination of 0.05mm and down-scaling of a STL model and its result in GCODE.
Not sure what I can tell in your case though. Did you had a chat with Velleman staff? Maybe they have a few ideas or somebody else here with more experience. I am a newbie myself since a few months…
No I didn’t had a chat yet with somebody of Velleman. I would love to do that but unfortunately they are not reacting to this track and there doesn’t seem to be a helpdesk.
I am seeing your post I saw Canthor helping you, and I didn’t write immediately.
The less time i need to spend on the forum, the more i can spend on developing new products
Can you post a picture of the complete build? And a video of the calibration when starting a print
We just added a part to our manual to address these specific issues.
You can check them here: https://manuals.velleman.eu/article.php?id=789. Have a look at the part “calibration issues”, that might be a big help to get the printer to work properly.
Thanks both for the help. Will try that tomorrow. In the meanwhile I can already post a picture of the behavior.
Will post more after I check the other instructions.
1 unregular sensor (the one to the left non-surprisingly where the print is not good).
3 sleds with a width of 71mm instead of 72mm
As I just have my printer I suppose this can be replaced under warranty, however I tried to file a ticket but as I bought the printer through a reseller I can not complete it. Can you do the necessary?
Bingo! You got the culprit that’s messing up your printer.
If you PM me where you have purchased the printer and your personal address, I will ask our repair department to send you the parts by mail order.
Putting up this subject again.
Same printer, same everything. So far I have been printing rather central in the printer. But now I’m having a big print ready and the fact is that my issue is still there. Even more, I now have a confirmation I think there is something wrong with the bed levelling;
Left side print; no extrusion; the bed is coming too close to the nozzle resulting in no print and the nozzle clogged up. See above for the pictures. Still same behavior.
Right side print; the nozzle is not close enough of the print plate resulting in a a bad print; https://imgur.com/a/TKmECl1
@Velleman guys, really looking for a final solution on this one. Remember, we already changed the sleds (which were 72 instead of 71). We changed the sensor (did all 3 of them).
I saw Canthor helping you, and I didn’t write immediately.
