I am using my own customized version of marlin on RAMPS 1.4. Most recent Marlin 2.x bugfix G28 XY. Once you change the switch position (EZABL Pro) or the wiring re-run the M119 test. Re: Z Stop Always Triggered Post by Ryche » Fri May 06, 2016 5:32 am I talked to Customer Service and they determined the board had a bad pin (the Z-Min port). I have a strange problem with the z-endstop,using mechanical switches. If the endstop sw is pushed in by han I have a 3DTOUCH probe as well. When i press "home" in pronterface,the z axis goes UP just a fraction and stops,and will not go down. UART connection works fine, but X and Y endstops always show as "TRIGGERED". Does anyone have any solutions or suggestions? I am using Marlin 2.0.6.2 that is from MKS site … In open loop systems, endstops are an inexpensive way to establish the actual position of the carriage on all axes. It does not stop when it hits that end stop. I am also using an inductive sensor. M119 always returns TRIGGERED (or OPEN if I flip the connector) for Z min. I'm having a bit of trouble wrapping my head around the configuration of the marlin firmware. I am trying to run Marlin with Ramps 1.4 and three end stops (mechanical) and can't seem to get it configured correctly. Problem: The X axis Endstop is ALWAYS triggering, regardless of the switch state. Is it a firmware setting I need to modify? the endstop pull ups are needed if you use mechanical endstops, comment them out if you have optos if you use mech endstops, only use the 2 outermost connctors on the board (not the + pin) only S and - for optos use all 3 if you send M119 and all is high you need to invert the endstops in marlin This will make the Z Endstop trigger. However, it does stop when I manually trigger the endstop when moving towards the -Y side. I varied sensitivity from 0 to 250, but nothing changed. (tried both states) Other 2 axis work find switching. It also does not change when a switch is attached. This is preventing the motor for moving the -X direction altogether. When the LEDs on the sensor and EZABL board are on z_min should show TRIGGERED. Steps to Reproduce. Expected behavior: Axis home I can onl When I send an M119 command it tells me X is triggered, even when nothing is connected. Y-Axis: Endstop is on the +Y side. Notes. Stops when it hits the endstop. It should look like the screenshot below: When the LEDs on the sensor and EZABL board are off z_min should show open. This may have side-effects if using SD_ABORT_ON_ENDSTOP_HIT. Jumpers on the SKR are closed any I ensured that there is an electrical connection between the DIAG pin and the endstop. When I send an M119 (endstop status code) I recieve: Send: M119 Recv: Reporting endstop status Recv: x_min: open Recv: y_min: TRIGGERED Recv: z_min: TRIGGERED And then when I press down the X endstop with my hand I get: Send: M119 Recv: Reporting endstop status Recv: x_min: open Recv: y_min: TRIGGERED Recv: z_min: TRIGGERED -No change. My first issue is the Z_MIN setting is always TRIGGERED when I run a m119 command. End stops are wired to C (COM) and NC. In the procedure known as “homing,” each axis is moved towards one end until the endstop switch is triggered, at which point the machine knows that the axis is at the endstop (home) position. X-Axis: Endstop is on the -X side. After this command endstops will be kept enabled when not homing. In Pronterface sending M119 gives me x_min: open, x_max: TRIGGERED, y_min: open, y_max: TRIGGERED, z_min: open, z_max: TRIGGERED. 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