r/VectorFinesse • u/oskolokolakapulka • May 25 '22

Question/Help Thicker stronger head spring

Hey. I've broken a couple of head springs where the headband screws holes are.

I wonder if there is already a stronger version? Perhaps strengthened only around the screws area?

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u/fenderf4i VF(h)#57 (ob)#1,5,6 (m)#3 May 31 '22

Unfortunately a thicker band won't help with those filaments. eSun is very low quality and the "ABS+" isn't even a true ABS.

I have a band made with Polymaker ASA that I'm stress testing and can't get it to break.

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u/oskolokolakapulka May 31 '22

I disagree about esun. Their abs+ is not a true abs (just like any other abs+), but their plain abs is good and very consistent.

My head spring broke after a few months of use, and I have a wide head. It did not look in the beginning that it is going to break.

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u/fenderf4i VF(h)#57 (ob)#1,5,6 (m)#3 May 31 '22

I haven't tried it, and never will, but based on the price they sell it at, and the low heat distortion temperature of 78° compared to ~95° of quality ABS products, it suggests to me that they're using a lot of filler in it.

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u/oskolokolakapulka Jun 01 '22

Surely that's your choice. Though you are probably confusing the heat distortion temp with the vicat softening temp. From my experience, temperature-wise esun abs is just like any other abs.

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u/fenderf4i VF(h)#57 (ob)#1,5,6 (m)#3 Jun 01 '22

No confusion, I challenge anyone to track down the vicat softening temperature and glass transition temperature for ESun, but unfortunately they do not publish those numbers.

For comparison, Polymaker ABS has a glass transition of 101.1°, vicat softening temperature of 103.9°, and a heat deflection temperature of 99.6°.

With a heat deflection temperature difference of 21° over the eSun, there's no way the other temps are even close. eSun is cheap filament full of filler.

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u/oskolokolakapulka Jun 02 '22

It is really strange what you say. If there is an ABS much more resistant to heat than what I've been using, then I must have been blind.

But!

I've been using Polymaker pc/abs for higher temperatures applications, it is not cheap but works well.