Nylon Warping Advice

[n2x4]

Hi Guys -

I've been struggling with warping nylon prints for the past few weeks. Hoping someone has some suggestions. I've done all the research I can and haven't found an answer that's worked for me yet.

I'm using Taulman 618 1.75mm on my Rostock Max.
Heated bed set at 45C. I've tried Elmers Purple glue stick on glass, 2" wide blue tape on glass, 2" wide blue tape with glue stick on glass. I'm getting warping at the corners, even with a 7mm brim.
Adhesion to the tape was great, unfortunately as the parts warped, the tape would pull off the bed. With glue on glass the brim starts to lift off the bed. Extruding anywhere from 230c to 250c gives the same results. I've also made sure the glass was cleaned with alcohol before I prepared my print surface.

What I haven't tried: drying the nylon before trying to print (I understand this will make it print cleaner, but is it supposed to help with warping?), garolite, mdf, poplar print surface.

Here's some samples of what's occuring:

You can see the color difference in the brim at the front corner. It's lifted from the bed and the part is warping.

[img]http://i.imgur.com/LmztuUF.jpg[/img]

While the warping isn't significant, you can see it's enough to notice.

[img]http://i.imgur.com/JsS8vs2.jpg[/img]

Is this something normal with nylon? Is it something I should account for in my printed object? Maybe add a "post" to the corners to try and keep the corners down?

[Nylocke]

The limited success I had with Nylon I printed at 110 bed temp, and I had no warping. Also when the Nylon is extruded, it should be clear, just like when its in its filament state. Yours isnt clear because its saturated with water (Nylon, like Polycarb, LOVES water)..... You can do the ever popular baking thing were you put it in the oven at min temp for a few hours, or you could try to make a dehydration box for all of your filament made with an airtight box and a dehydrator.

[vile_fly]

How about a chemical method of drying the nylon? Do you think 90-100% isopropyl alcohol would do the trick? It is a very thirsty liquid. Not sure how long it would have to soak, but after it is done, I would pack the spool with lots of silica gel packets in a closed container for storage. I definitely have to try nylon sometime this year after I learn all the in's and out's of the machine settings.

[Nylocke]

I dont know the how Alcohol will affect the water in the Nylon, but I know it probably won't damage the nylon, its got a lot of chemical resistance. The silica gel might work, but if you keep it out for too long it will absorb all the water again, so if you want to do long prints you may have to mount an airtight box with a bunch of silica or a small rechargeable chemical dehydrator onto the top of your MAX...

[lordbinky]

You could always try this

http://www.thingiverse.com/thing:35710