First Layer issue -3D printing

[aptc]

Hi guys,
I got a first layer issue during printing PLA. I have tried several times but still have same problems. At the beginning the print was quite nice, but after a while, these is are "bumps" on the surface. Some people said it is about the distance between nozzle and the bed. I have done some adjustments on the distance but problem still exists.
I'm using the Flashforge Finder, which has a pre-cut blue tape on the build plate and has no heated bed.
It would be grateful if someone can help me to solve this problem. Thanks a lot.



IMAG1094.jpgIMAG1093.jpg

[JohnnyV]

Please provide more details -

What model are you trying to print?
What slicer are you using?
What settings are you using (temperatures, travel speeds, etc)?
Have you calibrated this material?

We need more information before we can help you.