Every moderate length print failing October 18, 2015 11:17PM |
Registered: 8 years ago Posts: 90 |
Re: Every moderate length print failing October 19, 2015 01:20AM |
Registered: 9 years ago Posts: 344 |
Re: Every moderate length print failing October 19, 2015 03:47AM |
Registered: 8 years ago Posts: 5,232 |
Re: Every moderate length print failing October 19, 2015 05:55AM |
Registered: 8 years ago Posts: 778 |
Re: Every moderate length print failing October 19, 2015 05:57AM |
Registered: 9 years ago Posts: 752 |
Re: Every moderate length print failing October 19, 2015 07:20AM |
Registered: 9 years ago Posts: 95 |
Re: Every moderate length print failing October 19, 2015 08:59AM |
Registered: 8 years ago Posts: 90 |
Quote
cristian
Looks like an "almost" jamming hotend...
Quote
o_lampe
Make sure your wiring has no badly crimped contacts or bad solder. Remove each contact from the housing and check the crimping. Use solder too.
It's worth soldering stepper cables directly instead of using plugs, especially when they are a mix of dupond/molex etc...
-Olaf
Quote
mandrav
Which firmware?
Quote
Downunder35m
You changed driver and extruder already with no results, that only leaves the hotend or a very badly calibrated firmware.
I had some of your problems in the beginning too and was a bit lost.
It was only after a print failed multiple times that I watched it until it happened.
For me it was a settings problem.
Not sure what is was exactly as it too long ago but the extruder tried some infill or gap filling and was running like mad.
So instead of extruding it missed steps or chewed the filament - if not I would end up with a massive bolb of plastic somewhere on the print.
And depending on the part in question it would cause the next layer to loose adhesion and ruined the print.
Re: Every moderate length print failing October 19, 2015 09:08PM |
Registered: 8 years ago Posts: 778 |
Re: Every moderate length print failing October 19, 2015 11:04PM |
Registered: 8 years ago Posts: 90 |
Quote
Downunder35m
It never failed at the same spot.
In some cases the filament survived the abuse and the print continued only leaving an area with a gap or total overfill.
But I did notice that communication problems cause total failure as well - and often with no real hint on what's going on.
If you check the status window during prints, do you see errors in relation to the sending of commands or that the software is re-sending commands when the print fails?.
Does the printer give you response issues after the failure? I mean do you need to reset it or something?
In that case it would be a good idea to double check your power connections and supply - even a slight problem here can cause massive issues with the communication.
Re: Every moderate length print failing October 20, 2015 12:46AM |
Registered: 9 years ago Posts: 476 |
Re: Every moderate length print failing October 20, 2015 07:10AM |
Registered: 8 years ago Posts: 90 |
Quote
sarf2k4
What slicer program did you use? Your issue reminded me of an attempt to print a landscape with zortrax and it became spaghetti at that exact layer and point. tested it 3 times all the same but I didn't slice a new zcode though because I thought it was the machine's hot end issue or the 3d model but it printed fine on my friend's and my printer. I haven't tried to print the same model since the last z-suite I use; 0.9.7, now I think 1.2 or something
This might be the slicer issue or something, try using different slicer and see how well it goes?
Re: Every moderate length print failing October 20, 2015 11:37AM |
Registered: 9 years ago Posts: 344 |
Quote
MichaelBrock
Quote
cristian
Looks like an "almost" jamming hotend...
I have broken down the hotend 3 or 4 times to clean up the molten mess that usually results, including the nozzle. By "almost" jamming do you mean that the filament might be temporarily catching on something and prevening it from extruding? I'll break it down again and check it out.
Re: Every moderate length print failing October 20, 2015 08:22PM |
Registered: 8 years ago Posts: 90 |
Re: Every moderate length print failing October 20, 2015 08:25PM |
Registered: 8 years ago Posts: 90 |
Quote
cristian
There are many shades of "jamming hotend", in particular there are some conditions where the hotend stops extruding because it is jammed, but after a few seconds the jam can be slowly expelled on its own without manual intervention so the outflow is restored. There is nothing wrong inside the hotend, it is more a combination of hotend design, cooling conditions, volumetric printing speed, etc that makes the hotend "cough".
If that is the case, you may try by changing cooling, temperature and printing speed. As a first attempt, I would try lower printing speed, higher cooling if possible and higher printing temperature.
Re: Every moderate length print failing October 21, 2015 01:41AM |
Registered: 9 years ago Posts: 344 |
Re: Every moderate length print failing October 21, 2015 10:19AM |
Registered: 8 years ago Posts: 90 |
Quote
cristian
Do you have a heated bed?
Re: Every moderate length print failing October 22, 2015 07:53AM |
Registered: 8 years ago Posts: 90 |
Re: Every moderate length print failing October 22, 2015 11:21PM |
Registered: 8 years ago Posts: 90 |
Re: Every moderate length print failing October 23, 2015 01:31AM |
Registered: 8 years ago Posts: 778 |
Re: Every moderate length print failing October 23, 2015 03:07AM |
Registered: 8 years ago Posts: 5,232 |
Re: Every moderate length print failing October 23, 2015 06:45AM |
Registered: 9 years ago Posts: 344 |
Quote
o_lampe
For me it seems like X and Y-axis are only the victims of the error, not the cause.
I would take a closer look to the z-axis mechanic. Something is binding and causes the nozzle to run into the part, which makes the X and Y axis skip steps.
-Olaf
Re: Every moderate length print failing October 23, 2015 02:31PM |
Registered: 8 years ago Posts: 3 |
I had a problem, that my Z-axis was not well lubricated (i did not know that i have to do it each couple of months), so what happened was that the Z-stepper was skipping steps when it had to lift the platter after a retraction. So after at the end i got prints that instead of 10 mm height were 15+. Your photos do not look like it is this - but you could at least rule this out if you check itQuote
MichaelBrock
It occurs to me that the issue might not be with the extruder but rather with the Z axis. Maybe it's skipping and dropping the bed a bit. I know that stepper driver isn't getting hot but I'll try switching it out.
Re: Every moderate length print failing October 23, 2015 05:21PM |
Registered: 8 years ago Posts: 90 |
Quote
cristian
If X and Y were skipping steps, the print would not start back at the right position after some layers (or it would with infinitesimal probability), because the coordinate system would be messed up. Can you post in the forum one of the gcode files you are trying to print?
Re: Every moderate length print failing October 23, 2015 05:33PM |
Registered: 10 years ago Posts: 12 |
Re: Every moderate length print failing October 23, 2015 06:34PM |
Registered: 8 years ago Posts: 90 |
Quote
turboproc
Hi, had the same problem a while ago. Replacing most elements that I could change to no avail. This happened to me on a Prusa with E3D hot end.
At each print the hot end would jam after an hour or so. Cleaning did not help.
Having not too many alternatives left I decided to change filament brand. This solved the problem for once and forever. In fact with this filament temperature setting has become very forgiving.
May this can help you.
Re: Every moderate length print failing October 23, 2015 11:34PM |
Registered: 8 years ago Posts: 90 |
Re: Every moderate length print failing October 24, 2015 08:21AM |
Registered: 9 years ago Posts: 1,873 |
Re: Every moderate length print failing October 24, 2015 09:05AM |
Registered: 8 years ago Posts: 90 |
Quote
JamesK
Hi Michael,
Sounds like you've tried pretty much everything! I saw a statement about having tuned the motor currents downwards, and that nothing was gettting very hot - have you tried going the other way? Adjusting the Vrefs up towards the motors rated current value. Perhaps it's time to get things nice and warm and make sure you have enough torque to do the job.
Re: Every moderate length print failing October 24, 2015 10:53AM |
Registered: 8 years ago Posts: 5,232 |
Re: Every moderate length print failing October 24, 2015 10:30PM |
Registered: 8 years ago Posts: 90 |