Gel-lay informations

[RonanB 4]

Hi,

I am posting here because I bought some Porolay Gel-lay http://www.formfutura.com/285mm-porolay-gellay.html and I am printing it with a UM2 extended with no modification.

I didn't find informations on this filament, only temperature given by the description (225-235 )C) and no heated bed, and I want to know your parameters and experience if someone already use it.

On my side, I try to print it at 30mm/sec speed and 50 mm/sec infill speed. My temperature is 230°C with a 0.4 mm nozzle and 0.15 mm layer height.

I saw underextrusion on the infill so i might slow down infill speed for the next print, setting it to 30mm/sec. A problem I have is that during extrusion  can hear a sound, like sizzle, and i don't know if it's normal. Maybe the Imaterial is not dry, but i hear that sound since I start using it. Before I used sylver PLA from ultimaker and I cleaned the nozzle with the atomic method so it might not be because  of dirty nozzle.

Speaking of nozzle, since I use it, there are lots of little blobs appear on the outside of the nozzle (maybe sizzle sounds is due to "projection"). Any tips for cleaning it ?

I print first a kind of sphere with the same parameters as a test piece (my goal is to print organs like liver but smaller in a first time). I put no infill and the object was very weak when I deform it. I print a cube with 20% infill to test his strenght but it is not rinsed yet.

I might post pictures later, when i will have more rinsed prints.

Please share your experience, and sorry for my very bad english :-/.

[RonanB 4]

Now i have some pictures of the print.

I print a liver (scale 0.4) and this is what I get after few hours of print :

This is very rigid after printing. I put it in hot water before leaving work and after 15 hours,  I get :

When wet, this material is hightly deformable but breaks when you try to extend it.

The print takes 2 hours with parameters of the previous post. During the print, I increased temp from 230 to 235°C after few layers because of under extrusion on the infill. It solved it but it is better to lower the speed. I am now printing cylinders with different infill % and 30mm/sec definitively fix infill under extrusion at 230°C. I also disabled the heated bed and i didn't put glue stick on the plate, adhesion is still very good (I broke the bottom of the liver when I tryed to remove it from the plate with heated bed + glue :/). After few tries even without heaten bed and glue stick this is really hard to remove from the buildplate.

here a picture of the nozzle during the print. Before printing, it was a little dirty, I don't know what is happening. Do you have any ideas on how to clean it safely and why it happens?

Edited April 8, 2016 by Guest