Also, make sure you keep firmware and cura up to date as possible as UM is constantly making improvements to the default profiles.
If you hear lots of little pops and crackles when Nylon is printing then it may have soaked up too much moisture and may need drying out. This can cause all sorts of issues when printing.
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gr5 2,224
Do you have the UM3? Or are you doing this with an UM2?
The PVA and Nylon that UM sells are different from other brands as far as I can tell and they work very well together. Even better than PVA and PLA. I strongly recommend you start with UM brand and use the defaults in Cura. Default temperatures. Default horizontal expansion. But it's okay to print slower than the defaults. I found they worked very well together.
If you are having trouble with something sticking to the bed it's usually because the nozzle is too high above the glass. You can experiment while it's printing the bottom layer by simply pushing up on the glass and if it starts sticking better then just turn the 3 screws an equal amount to move the glass closer to the nozzle.
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