Further Nylon testing - Taluman 645 - Tweezer caps

posted 3 Dec 2014, 11:59 by Colin Bell   [ updated 3 Dec 2014, 12:25 ]

During a recent order, I grabbed a reel of Taulman 645 industrial nylon line to try with the Printrbot. The printing temperatures are pretty sensible, and within my max of 245c for the Ubis hot end. This initial test was to see how the material reacted, and is in no way a comprehensive test - that'll come later :)

I always prefer to do something useful even when only testing, and so I thought this would be a good starting point. 

I use several types of tweezer for my electronics work, and the supplied crappy plastic caps eventually wear out due to how sharp the tweezers are.

I printed them at a 0.2mm layer height, at 245c, which produced an immensely strong and tear resistant bond, so I'm hoping I don't need to replace them again anytime soon.

In the pictures, the caps are shown on size 3C and 2A tweezers, which are my most common use ones - I've actually used the same caps now on all (12 pairs!) of my tweezers and they all fit nicely.

As you will see, there is some blobbing on the models - I printed these at normal print speeds of around 30mm/sec and they are very small parts. I think next time I will try slowing down to around half this, and lowering the temp from 245c by a few degrees to see if that gets rid of the blobs.

If you're interested, the caps are available here.

While I had the 645 loaded, I thought I'd try another useful part that required high strength and heat durability, so I selected the Adafruit Flexible Filament guide which had been on my list to try for a while.

The first attempt was with support material...oh man, not with this material, oh dear me no...

The picture you can see to the left is showing the print after 20 minutes of hacking at it with heavy duty pliars and a craft knife.

This print is quite possibly stronger than the rest of the planet and all of its contents.

Once gave up on the above brick, I printed it again (there's also a couple of initial test prints of the tweezer caps in case you were wondering).

This shows that 645 is more than capable of detail prints, producing very strong while still flexible models if they are planned correctly. I printed the parts at 0.2mm layer height at 30mm/s. As with all the Taulman materials so far, it stuck to kapton/glue stick with no warping issues at all, even with my current cold-bed handicap.

You can see there is a whole bunch of stringing going on - I'm going to play with lower temps and slower speeds to try and fix this, but to be honest, I will only use this material for practical parts, where looks won't likely be important.

Although...I wonder if it can be dyed like 618? Hmmmm.....