Difficulties in sticking to bed
Hello
I recently purchased a CORE one L and for the first 5-6 prints it has gone well. I printed in Prusament PLA and PETG without any issue.
The printer has now developed issues with sticking on the bed (both the satin and the textured).
PLA doesn't really stick on the bed at all, seems the Z offset is way off.
PETG sticks but on the front left corner.
It seems that in the front left corner nothing sticks.
I have washed and washed the beds and wiped with IPA but that didn't solve the issue.
Any help please?
Best Answer by Ruebarb:
Read through this thread entirely.
RE: Difficulties in sticking to bed
Read through this thread entirely.
Core One L MMU3, MK3S
RE: Difficulties in sticking to bed
Hello
I recently purchased a CORE one L and for the first 5-6 prints it has gone well. I printed in Prusament PLA and PETG without any issue.
The printer has now developed issues with sticking on the bed (both the satin and the textured).
PLA doesn't really stick on the bed at all, seems the Z offset is way off.
PETG sticks but on the front left corner.
It seems that in the front left corner nothing sticks.
I have washed and washed the beds and wiped with IPA but that didn't solve the issue.
Any help please?
Is the nozzle clean? Does it have filament stuck to it? If so that can cause problems with the first layer since it will throw off bed leveling (bed mesh).
RE: Difficulties in sticking to bed
No the nozzle is clean
I believe the new bed doesn't really help in sticking, I will wash a few more times and see if I can make it work
RE: Difficulties in sticking to bed
Instead of starting a new thread about issues sticking to the bed, I will add a request here.
A friend has a Core One Plus kit and has issues with bed sticking since day one. Things stick but not evenly. Almost as an unlevel bed. Attached image is from a recent print. Good sticking in the middle but at the edges, everything lifts. This is after much tuning.
They have scrubbed the build plate with soap and water, multiple times. They cleaned the cold build plate with IPA before the print.
With their prints, since day one, they have had sticking issues. Looking at his prints, they have had z-level issues, as many prints don't have closed first layers. They finally modified his print profile to at least get part of the first layer print to be good. Since the prints are lifting, they are having issues with material catching on the nozzle and causing other issues. I have cleaned their nozzle from stuck filament. I suspected filament leakage but that is not possible with the Nextruder.
They are mainly testing with PETG since PLA won't work for their usage. They have run temp cal towers and other calibration tests and still is having first layer issues.
I am going to take my thermal camera over and look at their bed to see if they have a heating issue.
I did a print on my MK3s+ of one of his files and it is almost perfect in comparison to their prints.
They even had issues with the Benchy that comes with the printer.
RE: Difficulties in sticking to bed
I had some issues with non-sticking and it required few attempts:
- the original sheets are treated with some material which was causing the issues, I had to really scrub it through with a dish soap (and even some cleaning liquid with powder like Mr Muscle) for about 10 minutes to make it good - you will see the water will cling to it and not fall off as pearls
- mark the print sheet sides and use specific side for PETG only, and anything else for other materials, flip the side as required depending on the material used - so do not mix a bed sheet where you printed PLA to try to print PETG on it and vice versa
- clean nozzle - add a wiper
- auto home before the print
Once I used Magigoo stick, it really improved adhesion.
See my GitHub and printables.com for some 3d stuff that you may like.
RE: Difficulties in sticking to bed
They are using a satin sheet that was ordered after the printer. Since the print seems to stick in the middle and not the edges, may still fit your experience. Will pass the information to them.
RE:
They are using a satin sheet that was ordered after the printer. Since the print seems to stick in the middle and not the edges, may still fit your experience. Will pass the information to them.
- as already mentioned before: clean the plate with dish soap (without skin protecting additives = oil) and 99.9% IPA (70% IPA has too much water)
- I always grab/touch and clean the plates with cloves (those nylon cloves); this protects also the skin against IPA and the plates to getting finger prints on it
- stick to the recommended temperatures of the filament as starting point
- even when satin plate is mentioned on Prusa's filament guide as print plate - textured build plates are clearly stated on the printer shop pages as plate for PETG (when purchasing additional plates)
- I have no issues printing PCTG (similiar to PETG) with textured plate and I never touch/change z-offset or whatever as Core One's come with load cell
- try a first layer calibration print to play around with temperatures for a good first layer; print at least the 50x50 sample, watch the print and adjust temperature in 5°C steps; repeat if necessary or print the 70x70 sample; then print a benchy with the temperature you think is good as 1st layer
Core One L
RE: Difficulties in sticking to bed
They are following all suggestions already. I will check with the dish soap though. From the uploaded image, the centre is sticking good but the edges all around are not. Looked at the build plate with a thermal camera today.
I will have to confirm about the 99% IPA. I do know that they have litres of 99% IPA and was just assuming that was what they were using and the kind of dish soap. They may have some industrial soap.
They are a numbers person and look at the numbers. Squaring the printer is an issue they complained about since there were no measurements, just flex this or bend that. Follows the instructions from the filament roll to the letter. Give them some procedure where you use a caliper or micrometer and they are happy. Finally got them to print some Z cal tags and found that there was a squish issue and they adjusted the compensation in the slicer. Their first layers now look better.
When they first got the printer, they were having issues and things were not sticking to the build plate and being pulled off by the head. I finally convinced them to clean the head before each print. That helped.
They dry all the rolls. Stored in individual dry boxes with activated alumina and indicator. Moisture is not an issue.
I have been trying to get them to print a first layer test print that tests different areas of the print surface. Without numbers, they refuse.
RE: Difficulties in sticking to bed
Today, I took a file over as a test print. All default Prusa settings used with my slicer as I don't have a Core One+.
Watched them wash the build plate with Dawn dish soap, scrub with a nylon scrubber, clean with IPA. Test print didn't stick on the front corner and started lifting after 2 or 3 layers.
I noticed that the Z-screw was turning quite allot when the head was moving from the back to the front of the build plate. I did a rough measurement of 1.2mm change in height. I suspect that this has something to do with the problems as all prints seem to fail on the front half of the build plate.
Since this is the first time I have seen the full process on this printer, I also notice that they get a calibration message show up. Went through the build instructions and there is nothing about software and running the calibration routines on the printer. When I looked at the screen, they are all checked. Strange.
While discussing it, they are convinced that the probing will compensate for any build plate tilt. I disagree. Did a test and the printer does have a limit for out of level on the build plate and forces a Z-calibration. Did another test print of only two layers to watch the movement of the Z-screws. Movement was much less than before.
What was interesting was the result of the print. Even though the first level looks good, the visual result was interesting when holding it up to the light. Printed part towards the back of the printer was 100% opaque while the front allowed light through. This confirms that bed levelling is not working as expected and be much of the issue. I plan on getting an image of the issue.
I don't know where to go forward on this issue. I am suggesting some of the levelling mods. I also think it may be having a bearing on the calibration issue.
How can I explain to them the importance of having the bed mechanically level? I spent hours doing the silicone mod on my MK3 and I found a difference.
I do think that part of this is a filament calibration issue (using a Prusa supplied profile) and a mechanical alignment issue.
This was a Core One+ kit. Things that have been printed, other than lifting are square, just don't stick to the build plate.