Random Endstop Hit Error

chewbaccah

Random Endstop Hit Error
January 30, 2014 12:11AM

Registered: 12 years ago
Posts: 25

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

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cat.farmer

Re: Random Endstop Hit Error
January 30, 2014 12:20AM

Registered: 12 years ago
Posts: 466

What style end stops? Switch, optical, hall? Does the printer home correctly when you manually home?

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chewbaccah

Re: Random Endstop Hit Error
January 30, 2014 11:17AM

Registered: 12 years ago
Posts: 25

These are the endstops:

[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

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cat.farmer

Re: Random Endstop Hit Error
January 30, 2014 01:31PM

Registered: 12 years ago
Posts: 466

Any chance the boards are shorting against the frame? I don't know of any reason why you would get random false positive readings. Maybe try reloading the firmware.

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chewbaccah

Re: Random Endstop Hit Error
January 30, 2014 01:52PM

Registered: 12 years ago
Posts: 25

Great questions. The photo is not from my machine -- my endstops are not installed. It does happen regardless of whether the endstops are connected to the Ramps board or not. I plan to get them installed on to my machine today or tomorrow.

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

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chewbaccah

Re: Random Endstop Hit Error
January 30, 2014 05:53PM

Registered: 12 years ago
Posts: 25

cat.farmer,

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

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cat.farmer

Re: Random Endstop Hit Error
January 30, 2014 07:53PM

Registered: 12 years ago
Posts: 466

Cool, glad i could help. Just to finish up this thread..
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.

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rmacewen1

Re: Random Endstop Hit Error
April 05, 2015 02:08AM

Registered: 10 years ago
Posts: 1

Hi there.

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
echoteps 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
echoID settings:
echo:   M301 P22.20 I1.08 D114.00
echo:Filament settings: Disabled
echoD 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!

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