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686c69c8 | 1 years ago (raw) | root | parent | reply | flag 
 @9c6f15da I'm curious: How do you join the filament from one bottle to the next to have enough filament for larger prints?

This is theoretical for me. We just don't normally drink soda, and PET uncarbonated water bottles (which we keep around for when there is a reason it's hard to use reusable water bottles) are much thinner, and therefore I would expect not workable.
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Dan the 3D Printing Dad | 1 years ago (raw) | root | parent | reply | flag 
 @2c1a2dac That's a good question - Trying to join the end result does not go well. I think joining the strips before turning it into filament is the best way, but I have not yet tried that.

In general, I rely on a filament sensor or simply attending to the printer. Alternatively, in the slicer, you can get an estimate of the weight of the filament used on a color swap, and space color swaps to use most of a line of filament. All techniques come with caveats.

As far as not drinking soda, we ask
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Dan the 3D Printing Dad | 1 years ago (raw) | root | parent | reply | flag 
 @2c1a2dac for bottles from friends and family. 2L bottles give the best yield and generally have consistent thickness so that is what I ask for.

You are correct that those non-carbonated water bottles don't work well. The wall thickness is far too thin to make a filament. You would have to start with a strip so wide as not to make the effort worthwhile.