| black strong and flexible - [message #44413] Fri, 24 February 2012 05:24 UTC |
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Hey, I just received version two of a print that is supposed to have some really tight interactions with various pieces. In particular, it has a telescoping arm made of two separate pieces. I thought I would see what the dyed plastic looks like so I decided to do this version in black. Unfortunately, some of the tight clearances no longer fit as the dimensions in the newer version are just a bit larger than the undyed one.
Does ordering dyed prints mess up measurements, or was there a random printing error? The largest discrepancy would have to be the shaft of the inner part to the telescoping arm - undyed at 3.8mm, dyed at 4.1mm. Its enough that the dyed shaft doesn't fit in the dyed sleeve at all.
Luckily the undyed arm still fits in the sleeve so I still have a functional prototype, but in order to properly address this issue I need to know if this is due to the dying process or not.
Thanks!
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| Re: black strong and flexible - [message #44432 is a reply to message #44413 ] Fri, 24 February 2012 15:59 UTC |
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The nylon used does absorb water slightly, although probably not to this extent through the dying process. (Equilibrium levels are around 0.5%).
You could simulate this with your undyed part by boiling it in water for a few minutes, however given the size difference described this is unlikely to be the cause.
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