RAMPS+Marlin - Endstops not working - REALLY need help

Hi, this is driving me nuts. Decided to put a Mega+RAMPS in the Delta Linear Plus so that I can use a TFT32 touch screen.

I installed Marlin 1.1.9 and it's all good except only one endstop toggles between "open" and "TRIGGERED" and that's Z- for the probe.

I have spent 4 hours searching and trying stuff and finally I am here to ask for help.
I have gone back to the LCD that came with the Anycubic, a 20 x 4 simple LCD until I can get it working.

Only the Z-MIN works None of the other endstops change state.
I move steppers up and down with "Prepare" menu, bed and hotend both heat up but cannot home.
When I try "auto home," each stepper makes a small jump then stops, probably sensing an already "triggered" endstop.
I have another RAMPS shield and it does exactly the same thing.

I am ready to try anything at this point, well, short of putting the Trigorllia board back in.

Any and all suggestions will be gratefully tried.

Edited 1 time(s). Last edit at 01/09/2019 02:13PM by StlLooking.

A couple thoughts...

• What type of endstops are used for max? Are they bare switches, switches on circuit boards with LEDs, photo-interrupt sensors, or ??
• How many wires are on each switch?
• Do you have a meter to measure ohms/continuity?
• Please attach a copy of your Configuration.h

---

-David

Find me online at:
Thingiverse
Instructables.com
LinkedIn
Facebook

Check out my FolgerTech Prusa i3 (plexi) at MindRealm.net

Check that endstops work with M119. Issue the command and check how the result changes when you press/release endstops with your hand.
Looks like endstop pull-ups are not setup well or endstop inversion setting should be negated.