CPE+/PVA -> awful warp

[aag 3]

Something horrible happened. I made a large Ultimaker CPE+ print, and it came out of the printer beautifully (build plate: 110°C, UMS5 with plexiglass cover to retain heat). Then I put the model into warm water (45°C, thermostat + pump) to dissolve the PVA. And now the model warped horribly! It seems that the surface that was against the build plate has contracted and is now all bent. However, the upper surface (opposite to the build plate) is still in shape. What could have happened? How can I prevent that? Any help would be very gratefully accepted!

[Enigma_M4 71]

Hi,

I've read somewhere at the Ultimaker-Homepage, that the water used to dissolve PVA should only be up to 30°C, but they recommend use of cold water.

Greetings

[aag 3]

thanks - but wasn't CPE supposed to be more thermoresistant than PLA?

[Enigma_M4 71]

CPE is a little more heat-resistant than PLA (up to 70°C), CPE+ is said up to 100°C (I've not used CPE+ so far, only CPE), but with water temparature up to "hand warm" (starting temp, no heated bath) i never had problems with after-print warping.

 

[aag 3]

Also, I am not sure if it has anything to do with the water. I submerged it immediately together with the glass plate. Maybe it is just the temperature shock.

[kmanstudios 1,116]

On 4/20/2019 at 11:50 AM, aag said:

Also, I am not sure if it has anything to do with the water. I submerged it immediately together with the glass plate. Maybe it is just the temperature shock.

I would go with this. I would let the print and plate thoroughly cool before submerging in water.