We are moving towards getting some TPU Filament made to test the feasibility of printing parts that will cross link with Polyurea and Polyurethane. A source test lab has agreed to make some trial material.
What tolerance limits should be applied to the 1.75mm filament. I am thinking that a 1.78-1.80 max to avoid jams in the feed conduit and 1.65 min. The most inportant consideration I think would be consistancy at what ever size is chosen.
Any opinions?
nitewatchman
TPU Filament
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nitewatchman
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Re: TPU Filament
Having run my Filastruder for a while now. I can hold +/- .02mm. I would definitely shoot for under tolerance rather than over. If you go over too much the spool will be unusable:( Where as an under tolerance can be accounted for in software. Consistency is the key. Good luck with the trials! Let us know the out come.
-"Simpler is better, except when complicated looks really cool."
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-"As soon as you make something fool proof...along comes an idiot."
-"I have not failed. I've just found 10,000 ways that won't work." ~Thomas Edison
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Generic Default
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Re: TPU Filament
If you need anyone to test it.....
Oh and definitely keep it less than 1.8mm. Trimmer line is 1.65-1.69, very consistent, and it has never once jammed any of my hotends. Undersize is better!
Oh and definitely keep it less than 1.8mm. Trimmer line is 1.65-1.69, very consistent, and it has never once jammed any of my hotends. Undersize is better!
Check out the Tri hotend!
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nitewatchman
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Re: TPU Filament
Received notice yesterday that the lab has drawn the sample and in their words "It looks really good". Sizewise I don't know what that means although I told them that the important controls were max diameter and consistancy. I think that they have drawn between 2 and 10 Kilos so we will see what it is like. Worst case we will grind it and use in our injection molders.Generic Default wrote:If you need anyone to test it.....
Oh and definitely keep it less than 1.8mm. Trimmer line is 1.65-1.69, very consistent, and it has never once jammed any of my hotends. Undersize is better!
I will keep you posted.
nitewatchman
Re: TPU Filament
That does sound exciting...
Waiting with impatience.
Waiting with impatience.
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Re: TPU Filament
My printer can do right up to 2.0mm. After that the filament gets stuck.
Re: TPU Filament
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When on mobile I am brief and may be perceived as an arsl.
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Generic Default
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Re: TPU Filament
That polyurethane would print but it's expensive. The price is the same for a 3mm cord as for a 2mm cord, so using a bigger diameter would be more cost efficient.
Check out the Tri hotend!