I’d ordered all my PETG HF when I originally bought my P1S Combo. After the initial benchy in the supplied pla basic orange, another in the included pla basic green, then yet another in orange(one for each son that stopped by), I printed a poop chute in the sample PLA green.
Then not really knowing any better and tired of the sample colors, I opened the Red, Black, White and Blue PETG HF, loaded straight into the AMS, got on the handy app and printed this print in place box with the PETG HF
In my case, I also had small holes and imperfections with black PETG-HF filament on some layers. They were barely visible, but still noticeable when viewed closely. Your settings helped me eliminate this, and now it’s no longer visible. Retraction at 0.2 and Z hop at 0, and it’s perfect. Thank you!
yeah, I noticed going from colour to colour that it changed. I thought is was bed adhesion at first because I knew the filament was dry. Then I checked my nozzle which was quite dirty. So I switched nozzles then I have a new problem, in PETG-HF there is no choice in filament settings for a 6mm nozzle?! This probably wouldn’t be an issue for an experienced user but I am a bit of a greenhorn. I am still looking for a solution to this.
I too had some initial problems with light gray PETG HF without drying. I was about 70% of the way through a print when the my initial PETG HF roll ran out and I had to open a fresh box and load it into the AMS slot. You can notice where it changed in the print itself as the finish is not as smooth. As such I will be drying out all of my Bambu PETG HF (light grey or otherwise) for a few hours before starting prints.
The overall user experience with all filament would probably be improved by shipping it visually dripping with water, and bundling a filament dryer with every printer. That way nobody would kid themselves about filament coming wet from the factory.
Just assume it’s ALWAYS going to be wet when you get it. Doesn’t matter what company, or how humid it is where you are, it’s gonna be wet.
Last December I got my first Bambulab (A1 combo) and some filement - one was PETG-HF black. 1.5 Months later I unsealed the PETG-HF put it onto the AMS lite and printed a random functional print from printables - and it came out great multiple times. Than I put the spool back into the original plastic bag with the descant for like 3 to 4 weeks in a room with 20°C and 50% RH. 3 days ago I printed another functional print in PETG-HF and it came out terrible. Lots of hair on the inside and stronger strings on the outside. Reddit said its moisture. So I put the spool on the build plate at 50°, put a cardboard box on top, let the print heads fan blow inside and run it over night. Printed the same functional print the next day. And it looked way better. Not that good like the first prints after unsealing but way better. So I guess Bambu Labs PETG-HF datasheet is right: we need to dry PET-HF before each print.
Had a similar experience: bought 5 BL PETG-HF rolls. 4 out of 5 printed perfect, the 5th had a lot of problems right out of the box, high viscosity leading to bad extrusion, 1st layer problems (PETG sticking to nozzle instead of being laid down the bed), top layer with a very rough finish, stringing etc.
Filament rolls come in vacuum-sealed bags with desiccant. They can’t be moist after being vacuum stored, by laws of physics.
However I tried drying, then changed the nozzle temp to higher while slowing down the print speed - no improvements.
The other 4 rolls printed perfect straight out of the box with default settings.
I can only conclude BL has a bad batch every now and then. Esp. with PETG-HF. They should revisit their QA process and refund the affected customers.
I see where you wish to take this, however let me reinforce my initial note:
I got a bad batch. Others in this thread had similar problems.
This particular filament has a different consistency compared to all other BL PETG-HF rolls i have (and I do have a few). All other PETF-HF are very similar in behavior. Except this one. Color is dark blue, however I don’t think it’s the color, but the batch, where the problem is.
I had a rush job where I was low on dried PETG HF so started the print on a dried spool and put another in my dryer. About 5 hours in I had to swap the partially dried spool in (still had 3-4 hours of drying to go) and same thing - you can spot right where the change happened. The new spool had gone right from the shipping bag into the dryer. Had I used it straight from the bag it would have been worse. Don’t know how much worse though.
Hello,
I just got my X1C this week. I took the new spool straight out of the box and printed with the default PETG-HF Settings. This is what I got
Note this is my first 3D printer. what do you think ?
Generally good but the first photo has a bit of a doughy-looking surface which is how just a bit too much water in the filament manifests on my printer.
With dried filament I see very smooth surfaces with much reduced effects that highlight the layer lines. I thought I had posted photos in this thread but know I have in other PETG HF problem threads. The difference between wet and dry is very noticeable and doughy-looking surfaces seem to be a sign of water content being a little too high.
