Will this work with pulltruded filament?

[Kaminariss]

Hello,

I am writing with unusual use case for MMU which is pulltruded filament so I wanted to confirm if my idea is even worth considering.

I am in a middle of perfecting my machine and trying to automate some of the processes. One of them is continuing print when one roll finishes.

Biggest issue printing with PET filament is that usually individual rolls are just around 20g, my current solution is to have filament runout sensor next to print head:

https://cdn.discordapp.com/attachments/167661427862142976/992228984425304165/1656636212134.jpg

Obviously this is kinda tedious process to manually change filaments so I had the idea to employ MMU unit to automate that process for me.

However PET filament is not easy to operate, not only its very stiff but also hollow inside, that introduces several challenges when trying to print it, one of them is to have strong gears that are able to even pull it, I had to change my print head in order to achieve this (currently biqu h2 v2). Second issue is that tip is usually very very sharp and has some troubles coming thru holes that are not chamfered/smooth.

So my question is, will this project be suited for this use case or should i just forget it?

This is how machine currently looks like (prototype): https://cdn.discordapp.com/attachments/167661427862142976/990493613622427738/1656222475328.jpg

This is how it prints (manual change): https://cdn.discordapp.com/attachments/167661427862142976/992282494143561818/VID_20220701_061547.mp4

Unfortunately filament welding is even more troublesome than manually changing it: https://cdn.discordapp.com/attachments/167661427862142976/990882047713239040/1656315085257.jpg

My initial videos about building machine (there are parts with my machine). https://www.youtube.com/watch?v=Pu34ndoL9wI https://www.youtube.com/watch?v=5Hv6GIz_-6I

[EtteGit]

HI!

I think we discussed about it in Discord. Do you have any more question about this or can we close this topic here?