My Wife's Knitting Line Keeper (two versions: magnetic and friction)

This is a simple tool I made for my wife to help her keep track of what step she's on while knitting/crocheting a complex pattern.  She typically uses her apple watch to keep track of simple projects, but on this one, it has a ton of steps. 

This is two pieces that are glued together… notes about gluing below.

The top piece has the opening for reading text… note that the opening is chamfered so the text is easier to read.

(3/23/2023 Update: added a magnetic version)

The Magnetic Version

While the non-magnet version works okay… the magnet one holds better and is more flexible with fewer pages.

I already had a pack of magnets (https://www.amazon.com/dp/B09WZTSQ9Y) so I made the magnet holes big enough for the 8mm x 2mm (technically they're 1.65mm tall).

On my Ender 3 S1, I can bridge okay, but I found that the chamfer printed fine when inverted… so I printed both pieces with the magnet holes facing upwards.. which made them come out way cleaner.

I used a tiny (bb-sized) dot of hot glue to affix the magnets in the holes.

Additionally, I found it was really helpful to take a little bit of sandpaper and smooth out the sides that sit against the paper… if your printer does well with ironing, that would be an alternative to sanding (I'm still dialing in my ironing settings to get consistent happy results).

Gluing (for both the Magnetic and Friction Version)

I use this super-glue on all of my 3d projects and it's worked really well with PLA, PETG, and TPU:
https://www.amazon.com/gp/product/B01MDNS8QB/ref=ppx_yo_dt_b_search_asin_title

Make sure to only apply glue to the raised area on the bottom piece… then line up the top piece (making sure that the chamfered edge is on the bottom) and clamp (or set a weight on it like it did… make sure to check the alignment after clamping to make sure it's still aligned).

Print settings

Here are the settings I used, but it's a pretty simple print, so I'm sure you could alter these however you please:

•  PETG (PLA should work just as well)
• .6 nozzle (but I'm sure .4 will work fine)
• I went 0.15 layer height because I wanted the slopes to have fine detail/transition

For the fiction version, I used a small file to smooth out the raised slopes that hold the paper tight… that way the paper slides in and out easier.