Keeps doing filament change

Bambu Lab A Series Bambu Lab A1 mini
1

I up graded to the new BS the weekend, since then I am having problems when printing a single colour item.

It constantly keeps doing purging old filament like every 2-4 minutes.

Is this related to the upgrade, or something else, hoping someone can help.

Also is there a way to roll back to last version ?, and if so do my custom filaments get lost.

TIA

2

what filaments are you using? if the filament cracks and runs out the ams will push the filament forward and then purge the “old “ filament.

1 Like
3

Post your 3MF file please!

4

This is the file on Makerworld

https://makerworld.com/en/models/731462-a1-filament-poop-bin-v2-deflector-scrapper-stand#profileId-763016

Using PLA basic

5

I’ve seen this happen once because there was a tangle in the spool and the printer was trying to correct itself…at least I think thats what was going on. I thought it was possessed it was so weird. Single color print I had done many times before. And yes there was a good tangle on the spool.

6

Ooooh this might be what happened to me, it was purging broken filament. It was a fiber filament that I ended up respooling to fix.

7

I checked the filament and not broken.

8

UPDATE:

Have rolled back to previous version, and it still does the same.

I have printed this before within the last 6 months and had no problems printing.

9

Just downloaded a small print from Makerworld, and it does it on that.

Starting to think it could be some setting I have not seen, of A1 firmware.

10

PROBLEM SOLVED:

Been printing all week with TPU with no problems, on Tuesday I changed the tubing to all reels and continued to print.

Thursday I needed to print in PLA, that’s when the problem started, I did not even think about the tubing, but then it clicked, so I have refitted the old tubing and it’s working as normal.

I would say that this PTFE tubing even with a 2.5mm hole had a lot of friction causing the A1 to think the filament was stuck, as mentioned in the comments above.

This is the tubing I purchased from Amazon that even says it’s suitable for the A1 except for soft material, which worked fine.

https://www.amazon.co.uk/dp/B0DM96N8QF?ref=ppx_yo2ov_dt_b_fed_asin_title&th=1

Thanks for all the advice.

2 Likes
11

Glad you figured it out and let us know.