Random Endstop Hit Error Alright Reprap experts, I need your help. I am a total newbie, so I apologize if I am missing something basic here. When beginning a build, I get a "Hit Endstop:Y" message on my LCD screen, and the build continues. I continue to get the same error at random points in the build. The screen flashes when it happens. It occurs whether or not the endstops are connected to the RAMPS board. Unfortunately, the build rehomes, and continues running offset to the original XY coordinates. I am using Marlin with Ramps 1.4 Any and all help is appreciated. Thanks! Ken https://reprap.org/forum/read.php?219,303177,303177#msg-303177 Thu, 12 Mar 2026 09:34:41 -0400 Phorum 5.2.23 https://reprap.org/forum/read.php?219,303177,492961#msg-492961 Re: Random Endstop Hit Error https://reprap.org/forum/read.php?219,303177,492961#msg-492961
I have the same problem as you had. I have 6 NC endstops installed on the RAMPS 1.4 (N.C. with LED which turns on when switch is moved to open).

I am only testing the steppers now, but just on X command (either through pronterface or through LCD control panel) I get "endstops hit"

Quote

start
echo:Marlin1.0.2
echo: Last Updated: Apr  1 2015 22:50:45 | Author: (none, default config)
Compiled: Apr  1 2015
echo: Free Memory: 3134  PlannerBufferBytes: 1232
echo:Hardcoded Default Settings Loaded
echo:Steps per unit:
echo:  M92 X160.00 Y160.00 Z160.00 E200.00
echo:Maximum feedrates (mm/s):
echo:  M203 X300.00 Y300.00 Z5.00 E25.00
echo:Maximum Acceleration (mm/s2):
echo:  M201 X3000 Y3000 Z100 E10000
echo:Accelerations: P=printing, R=retract and T=travel
echo:  M204 P3000.00 R3000.00 T3000.00
echo:Advanced variables: S=Min feedrate (mm/s), T=Min travel feedrate (mm/s), B=minimum segment time (ms), X=maximum XY jerk (mm/s),  Z=maximum Z jerk (mm/s),  E=maximum E jerk (mm/s)
echo:  M205 S0.00 T0.00 B20000 X20.00 Z0.40 E5.00
echo:Home offset (mm):
echo:  M206 X0.00 Y0.00 Z0.00
echo:PID settings:
echo:   M301 P22.20 I1.08 D114.00
echo:Filament settings: Disabled
echo:SD init fail
(command sent)
echo:endstops hit:  X:0.01


Someone shoot me. lol I just probed steppers and found pairs. I had to translate colors. I had error before doing this too. But I think I got them right. I could really use any suggestions as to where to look or what to disable.

Thanks!]]> rmacewen1 RAMPS Electronics Sun, 05 Apr 2015 02:08:38 -0400 https://reprap.org/forum/read.php?219,303177,303640#msg-303640 Re: Random Endstop Hit Error https://reprap.org/forum/read.php?219,303177,303640#msg-303640 The end stops are needed to let your machine know where all of its parts are. When you home your device(assuming you are at endstop_min) sets your printer to position 0,0,0. It then counts the steps to the next position. Without a starting position you machine will never work correctly.]]> cat.farmer RAMPS Electronics Thu, 30 Jan 2014 19:53:03 -0500 https://reprap.org/forum/read.php?219,303177,303586#msg-303586 Re: Random Endstop Hit Error https://reprap.org/forum/read.php?219,303177,303586#msg-303586
Thank you for your help. I believe I have it resolved.

For those who may encounter this issue, this was my mistake:

1. I removed the home position command from the G Code (G28) because I had not installed the endstops.
2. I should have installed the endstops.

Installing the endstops seems to have entirely resolved the issue. It runs beautifully now!

Thank you again for your time and expertise!

Ken]]> chewbaccah RAMPS Electronics Thu, 30 Jan 2014 17:53:22 -0500 https://reprap.org/forum/read.php?219,303177,303480#msg-303480 Re: Random Endstop Hit Error https://reprap.org/forum/read.php?219,303177,303480#msg-303480
I did reload the firmware, but I wonder if the configuration of the endstops in the firmware is wrong for my machine. Is there a specific setting for this type of endstop?

Thank you again for your help.

Ken]]> chewbaccah RAMPS Electronics Thu, 30 Jan 2014 13:52:34 -0500 https://reprap.org/forum/read.php?219,303177,303468#msg-303468 Re: Random Endstop Hit Error https://reprap.org/forum/read.php?219,303177,303468#msg-303468 cat.farmer RAMPS Electronics Thu, 30 Jan 2014 13:31:59 -0500 https://reprap.org/forum/read.php?219,303177,303393#msg-303393 Re: Random Endstop Hit Error https://reprap.org/forum/read.php?219,303177,303393#msg-303393
[www.robotronics.com.au]

Right now, it is not set to auto home, so it homes where I locate the head. During a build, when the "Hit Endstop: Y" is thrown, it homes to wherever it is and continues building offset from the original home location. Interestingly, the "Hit Endstop:Y" is thrown regardless of whether an endstop is connected.

Thank you for your help!

Ken]]> chewbaccah RAMPS Electronics Thu, 30 Jan 2014 11:17:59 -0500 https://reprap.org/forum/read.php?219,303177,303178#msg-303178 Re: Random Endstop Hit Error https://reprap.org/forum/read.php?219,303177,303178#msg-303178 cat.farmer RAMPS Electronics Thu, 30 Jan 2014 00:20:39 -0500 https://reprap.org/forum/read.php?219,303177,303177#msg-303177 Random Endstop Hit Error https://reprap.org/forum/read.php?219,303177,303177#msg-303177
When beginning a build, I get a "Hit Endstop:Y" message on my LCD screen, and the build continues. I continue to get the same error at random points in the build. The screen flashes when it happens. It occurs whether or not the endstops are connected to the RAMPS board. Unfortunately, the build rehomes, and continues running offset to the original XY coordinates.

I am using Marlin with Ramps 1.4

Any and all help is appreciated.

Thanks!

Ken]]> chewbaccah RAMPS Electronics Thu, 30 Jan 2014 00:11:28 -0500