Customizable Necktie

I got the idea after printing this. I modeled new linkages to make it lighter. Fully assembled it weighs about 80g (depending on length).

Requirements

A ∅3mm x 1m rope

3*8mm round magnets (at least 12, add 3 for every additional printed Tie knot)

Analog Compass to universally align the magnets

3D pen to close the open hooks.

Something to shape the molten plastic from the 3D pen with (Like small screwdriver).

(If you don't have a MMU) The time to change the filament roughly every 30min for the first 2.5 hours.

Printed Necktie Instructions

Print Settings

infill > Bottom fill pattern: Pick a cool one, I used concentric.

I would recommend a Smooth build plate especially if you want the Bottom pattern to show up.

all other settings are the standard “0.20mm QUALITY”.

Getting the correct length

After assembly the tie should be about 4% longer so if you need a 500mm tie, make it close to 480mm by removing linkages from the top part. By elongating a cube to your required length you can see how many segments should be removed.

Next split “Tie 1” into objects.

Select the segments that make the top too long but leave segments connected to the top part 

Now merge to make it a single object

Now the Tie is the correct length and you can remove the elongated cube

(If it needs to be shorted more than “Tie 1” you can remove segments from “Tie 2” and carefully move and merge the top part. Make sure the loops don't intersect)

Multicolor for anyone without a MMU 

Go to Printer Settings > General > Extruders and add a extruder.

Go to Print Settings > Multiple Extruders > Wipe tower and Enable it if it wasn't.

Go to Printer Settings > Custom G-code and add: 

M600

This way it will add a manual color change to the g-code every time it should switch to another extruder.

You have to stay with the printer but it is only for the first 5 layers at 0.2mm.

Put the wipe tower in the lower right corner so after a color change there is les travel to the tower.

Adding color

After putting it on your print area. Cut all three objects into Parts at Z: 1.00

Now you can paint whatever pattern you want using the Multimaterial painting Bucket fill tool type. (Bucket fill selects connected body's)

Do make sure your patterns line up after assembly and you only select the hexagons or edges and not the linkages. 

Post printing

Assembling the tie

carefully place the tie pieces in each other it should be strong enough to see if the length is good. (If it isn't, re-print the top piece. remember to check if the pattern matches up.)

Closing the open loops can be done by propping something underneath the area you're working on so the linkages are further apart. Use a 3D pen to close the loops and the aforementioned tools (like a screwdriver) to shape the plastic in a loop.

The Neck piece

the neck part needs to be hung around the neck with a rope preferably one that breaks when too much force is applied.

At 1 is a simple overhand knot and it is there so you can't overtighten the tie. Place in a overhand knot but don't tighten it yet. It should be about 50cm from the short end. 

At 2 is a Slip knot the short end is used to make the knot. 

Place the rope around your neck and move knot 1 while sliding knot 2 until it is around the neck. Tighten knot 1 next to the Neck Part.

If done correctly you can now slide the long side to remove the rope.

Magnets

The magnets are press fit.

Make sure the magnets are all aliened as shown. You can check the orientation with a compass (remember when it repels North it is North). 

Done!

Enjoy the necktie!