Everything seems to be working fine exept for two things:

When I use Auto Homing the print bed only moves 10mm to the opposite direction of the end stop. That causes a lot of problems when starting or pausing prints. Printing itself is working pretty good actually but the homing doesnt work.

Things I have noticed/tried:
-used another cable
-made sure its wired correclty
-pushing the end stop while homing
-try to auto home with the Y end stop unplugged
-invert end stop in marlin (this caused the print bed to move towards the end stop but it never stopped moving)
-tried the end stop noise filter with lvl2 sensitivity in marlin

The second problem is that i suffer a lot from underextrusion I think during the first 20-40 layers. Initial layer and the layers after the first 20-40 are looking great btw.

M119 is your friend

check your endstops

If the logic is inverted the axis can move back 10mm or so..

What its doing is:
Try to move home, but the endstop is triggered. so it doesn't move
back off a bit, this works
rehome slower, but endstop is still triggered so it doesn't move.

thanks for the reply. I have thought about pronterface too. If thats what you mean. But the problem is that my pc is very far from my printer. is there a way to connect pronterface over the wifi/octoprint?

Edit: NVM, I have just found out that those are marlin commands and that I can run them through octoprint too.

Do you have any ideas what might be causing the extrusion problem?

Edited 1 time(s). Last edit at 10/05/2019 10:03AM by Dennis2089.

Ok this is what I got from the command in octoprint after running auto homing:

Send: M119Recv:
Reporting endstop status
Recv: x_min: TRIGGERED
Recv: y_min: TRIGGERED
Recv: z_min: TRIGGERED
Recv: filament: open
Recv: ok P15 B3

(X and Z are at the end stop but Y is not. why is it reporting as triggered all the time? Even when it was unplugged? I even tried another slot. I changed the pins to the pin number from Y max stop and thats giving the same result. Im really out of ideas.

an unplugged end stop is normally treated as triggered

Try the X endstop on the Y plug, perhaps its as simple as a dead switch or cable.

If not there are only two possibilities left. Firmware (not likely) or dead hardware.

Additional EDIT:
I just tried standard marlin 2 bugfix set the motherboard to BOARD_BIGTREE_SKR_V1_3 and serial port to -1 with no other changes

with no endstops attached it shows all min endstops as TRIGGERED as expected
I connect the S pin to the G pin of a MIN and stop and they all change to OPEN, as expected. Tested X-MIN, Y-MiN, Z-MIN all worked as expected.

Edited 2 time(s). Last edit at 10/06/2019 06:52AM by Dust.

Problem solved. Thx

Hi,
How did you solve the problem because I have the same problem.
Thank you

Problem solved

#define Y_MIN_ENDSTOP_INVERTING true