Difficulties when beginning print

[styrmand 0]

https://drive.google.com/file/d/1Fd9PavVjrM-74ZaT8SyxTn7LdqWG3vOIhg/view?usp=sharing

I have recently bought a second hand Ultimaker Original. The printer is having trouble when starting printing. I have an idea that i helps, if i help the feeder in the beginning of the print.

I haven't assembled the printer myself, som I'm not sure if there is any adjustment possibilities for the feeder. I can se, there is a screw that apparently adjust the pressure on the PLA in the feeder.

I have linked to an image, where you can se how the beginning of my prints look.

Does anyone have suggestions what i can do to improve that?

[xeno 108]

This could be several problems,

is the nozzle diameter set correct, or the feedrate.

the feeder screw can be changed, but too tight will deform the filemant, and could need more force to push through the bowden tube,

too lose and it will loose grip.

check the hobbelt bolt if it is clean, try to make a pic what the filament looks like after it is pushed through the feedr (teeth marks)

and if you are not sure if your Cura settings are correct, you can do a reset of all settings.