It should look like the screenshot below: When the LEDs on the sensor and EZABL board are off z_min should show open. Notes. I'm having a bit of trouble wrapping my head around the configuration of the marlin firmware. (tried both states) Other 2 axis work find switching. It does not stop when it hits that end stop. I am trying to run Marlin with Ramps 1.4 and three end stops (mechanical) and can't seem to get it configured correctly. My first issue is the Z_MIN setting is always TRIGGERED when I run a m119 command. 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. When sending the m119 command.all switches show open except z min,which shows triggered. 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. I am using my own customized version of marlin on RAMPS 1.4. Once you change the switch position (EZABL Pro) or the wiring re-run the M119 test. Steps to Reproduce. This may have side-effects if using SD_ABORT_ON_ENDSTOP_HIT. Most recent Marlin 2.x bugfix G28 XY. If the endstop sw is pushed in by han End stops are wired to C (COM) and NC. I can onl 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 varied sensitivity from 0 to 250, but nothing changed. In Pronterface sending M119 gives me x_min: open, x_max: TRIGGERED, y_min: open, y_max: TRIGGERED, z_min: open, z_max: TRIGGERED. However, it does stop when I manually trigger the endstop when moving towards the -Y side. Is it a firmware setting I need to modify? It also does not change when a switch is attached. Does anyone have any solutions or suggestions? Jumpers on the SKR are closed any I ensured that there is an electrical connection between the DIAG pin and the endstop. I am also using an inductive sensor. The results are actually: SENDING:M119 Reporting endstop status x_min: open y_min: open z_min: TRIGGERED I have tried changing the Z_MIN_ENDSTOP_INVERTING to true, did not work. 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. Problem: The X axis Endstop is ALWAYS triggering, regardless of the switch state. I have a strange problem with the z-endstop,using mechanical switches. UART connection works fine, but X and Y endstops always show as "TRIGGERED". After this command endstops will be kept enabled when not homing. I have a 3DTOUCH probe as well. Expected behavior: Axis home 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. Stops when it hits the endstop. This is preventing the motor for moving the -X direction altogether. When i press "home" in pronterface,the z axis goes UP just a fraction and stops,and will not go down. 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 When the LEDs on the sensor and EZABL board are on z_min should show TRIGGERED. M119 always returns TRIGGERED (or OPEN if I flip the connector) for Z min. X-Axis: Endstop is on the -X side. This will make the Z Endstop trigger. 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