first layer messing up
So when I try and print a layer print or anything that requires a large flat first layer I end up getting this going. I have shecked all my setting, reset everything and checked temps and everything seems to be good, I am a less than a year printer so I do not know a whole lot about this as it is a new hobby for me. I just upgraded from the MK4S over to the conversion kit Core One. I had no issues when I built and used the MK4S and almost ever single print I had over there printer out very well. Since the new conversion I have not been able to get a lot of printing done as I would say I am at about a 75% failure rate due to one thing or another such as layer shift, bed adhesion, oozing and almost every common issue you can see. I do have my filament in a dryer and live in Texas and out humidity is around 30% on average. I am just looking to see what could be causing this as you see it starts off strong and as it starts moving to the back left it starts messing up and then once it gets to a point it starts acting right again. I have clean the plate, checked the bed and nothing under the plate or on the bed to cause this. THANK YOU in advanced for any help offered up.
As you can see in the pictures below of the issue I am having.
Best Answer by gb160:
contact support, they'll know best how to troubleshoot this.
RE:
To me it seems like a couple of issues superimposed.
- How have you tensioned the belts? Which methodology did you use?
- Is the gantry square?
- Is the nozzle clean?
- What kind of nozzle is it? What settings are you using for the nozzle?
- Is the heat block/nozzle correctly seated into the extruder?
- What filament are you using and what preset are you using?
- Is the print sheet clean?
RE: first layer messing up
To me it seems like a couple of issues superimposed.
- How have you tensioned the belts? Which methodology did you use? Tune and the print belt tuner.
- Is the gantry square? Seems to be as it passes all the test and this goes with the above as it would do that banging and then once I had the belts properly adjusted it does the one tap each way.
- Is the nozzle clean? I have cleaned it yes and extrudes fine and did a good cleaning on it before this print time.
- What kind of nozzle is it? What settings are you using for the nozzle? MMU3 .4 HF
- Is the heat block/nozzle correctly seated into the extruder?Yes it is sitting at that 45 deg position
- What filament are you using and what preset are you using? This one was PLA and the default Prusa PLA slicer presets. 230/60
- Is the print sheet clean? Yes the print sheet has been washed and used 90% IPA on it.
RE: first layer messing up
To me it seems like a couple of issues superimposed.
- Is the heat block/nozzle correctly seated into the extruder?Yes it is sitting at that 45 deg position
- Is the print sheet clean? Yes the print sheet has been washed and used 90% IPA on it.
If you are using the SPEED profile, try switching to STRUCTURAL instead. Also, try a different build plate. I have the Prusa textured sheet but it was really difficult to get a decent first layer. I'm using instead a textured sheet I got on Amazon for $20 that does a much better job.
RE: first layer messing up
Thank you and I will try that but I have a different build plate in there trying it. I will try the speed setting after this print.
To me it seems like a couple of issues superimposed.
- Is the heat block/nozzle correctly seated into the extruder?Yes it is sitting at that 45 deg position
- Is the print sheet clean? Yes the print sheet has been washed and used 90% IPA on it.
If you are using the SPEED profile, try switching to STRUCTURAL instead. Also, try a different build plate. I have the Prusa textured sheet but it was really difficult to get a decent first layer. I'm using instead a textured sheet I got on Amazon for $20 that does a much better job.
RE: first layer messing up
Just printed with a new sheet and still the same on the left side of the build plate when looking at it. I have also added pictures of the print head.
RE: first layer messing up
Just printed with a new sheet and still the same on the left side of the build plate when looking at it. I have also added pictures of the print head.
This photo (assuming the plate is square on the bed) implies that the gantry is not square. As far as the tears are concerned, maybe there is over extrusion. Start will changing the extrusion multiplier 0.95 (for example) or switch to STRUCTURAL and see if that makes a difference.
RE: first layer messing up
I have a friend who says do the first layer calibration and adjust the z while printing but I am not even sure where to find this or if that is only on the XL(That is what he uses)
RE: first layer messing up
contact support, they'll know best how to troubleshoot this.
RE: first layer messing up
I have a friend who says do the first layer calibration and adjust the z while printing but I am not even sure where to find this or if that is only on the XL(That is what he uses)
Hold the button down while it's printing and the z-adjust menu will appear.
RE: first layer messing up
Squareness question aside, that looks a lot like its just not sticking to to the print sheet. I had a weird issue with this myself over the weekend, rewashing with hot water, dish soap, and a scotch-brite fixed it. I had used glue stick on the failed print but was printing sequentially - first piece and a half worked then popped loose and after, nothing stuck (I caught the spaghetti right between pieces and cleaned it off, went right back to it - even reprinting where the first item had stuck failed.
RE: first layer messing up
It did this on two different sheets and even on one with the glue stick. Seems to be almost the same location each time.
Squareness question aside, that looks a lot like its just not sticking to to the print sheet. I had a weird issue with this myself over the weekend, rewashing with hot water, dish soap, and a scotch-brite fixed it. I had used glue stick on the failed print but was printing sequentially - first piece and a half worked then popped loose and after, nothing stuck (I caught the spaghetti right between pieces and cleaned it off, went right back to it - even reprinting where the first item had stuck failed.
RE: first layer messing up
It did this on two different sheets and even on one with the glue stick. Seems to be almost the same location each time.
What happens when you move the square to 4-5 cm to the left. Does this pattern shift or stay the same? Or if you move it to the right does it go away? If not I think this is just over-extrusion.
RE: first layer messing up
I am on with Tech support trying to figure this out but I will try that and let you know.
It did this on two different sheets and even on one with the glue stick. Seems to be almost the same location each time.
What happens when you move the square to 4-5 cm to the left. Does this pattern shift or stay the same? Or if you move it to the right does it go away? If not I think this is just over-extrusion.
RE: first layer messing up
Nothing sticking to the print bed under the sheet?
RE: first layer messing up
So after trying lots of different things with support we finally bumped the temp up to 250 and it printed fine so they are calling it a bad thermistor for the nozzle and are sending a new one out.
RE: first layer messing up
Checked and it was clean
Nothing sticking to the print bed under the sheet?
RE: first layer messing up
Well that was quick as I received the thermistor today and followed the instructions on the replacement of it and what to do know. Guess it was bad as right out of the shoot it printed like a charm. I will say I was disappointed on the CoreOne roll out and it taking 5 months from the order day to ship day but to have customer service like this I am pretty sure it would not have gone this smoothly with one of the other ones I was eyeing.
