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13 votes

Which endstops are most precise?

There are some different criteria that we should use to select a switch type: Precision / repeatability: does the switch trigger at the same place every time? How much spread is there in the trigger ...
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  • 6,446
6 votes
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What is this part and does it have to do with my my z-position is messed up?

Limiter Switch/Endstop That is the lever that is meant to trigger your Z-Endstop. The variant used in your case is on the cheaper end and is meant to look similar to this QIAOH KN12-1 limit switch: ...
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  • 19.2k
6 votes
Accepted

Does moving the z-endstop upwards affect the maximum height of the printable object?

If you move up the end stop such that it raises the nozzle with respect to the build platform you lose height, so basically the answer is yes. But, as seen in your referenced question, your nozzle ...
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  • 30.4k
5 votes

TEVO Tarantula Z-Axis Lowering Too Far After Endstop Triggered

The soldering in the Tevo components is very low quality as I replaced/resoldered most of the end-stops. As the gantry goes down - please ensure that the cable is not pulled over (no contact) and ...
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  • 1,922
5 votes

Z-axis endstop not functioning after Marlin Firmware installation

After gaining more of an understanding of how Marlin works, I decided to look through the the pins file for the motherboard I am using "pins_ULTIMAIN_2.h". Sure enough, It had a the wrong pin number ...
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5 votes

Which endstops are most precise?

Thomas Sanladerer performed exactly the comparison you ask. Check the whole video. The result is that inductive sensors are the most accurate, but they are highly dependent on the bed material chosen....
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  • 3,786
4 votes

Which endstops are most precise?

I don't think there is a simple answer. In my opinion, for a home sensor accuracy doesn't matter. Firmware usually allows setting an offset between the indicated position and the actual position. ...
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  • 4,398
4 votes
Accepted

Endstops will not trigger using Marlin Firmware

try uncommenting the following lines to enable endstop detection on all pins for troubleshooting. ...
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  • 56
4 votes

Z-axis comes down and presses the bed while printing

When the head/nozzle assembly runs into the bed, you need to watch out for: Check for Endstop problems: Is the switch properly wired up? Is the switch working? Is the switch mounted firmly to the ...
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  • 30.4k
4 votes

TEVO Tarantula Z-Axis Lowering Too Far After Endstop Triggered

I'm not familiar with your particular model, so this may not be directly applicable. For many printer models, a swing thru thingiverse.com will find you a replacement z-stop switch mount that uses a ...
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3 votes
Accepted

Home E / extrude until endstop is triggered

You should be able to adapt the "Dual X Carriage" feature for your project. That allows a second print head (on the X axis) to move independently of the "main" X axis motor - and it can also be homed ...
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  • 1,182
3 votes

My DIY printer only boots when all my endstops are triggered. Why is that?

From your fault description of printer logic board losing power when endstops are released it sounds to me like those endstops are shorting VCC to GND when not pressed. That the fault also goes away ...
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  • 274
3 votes

MKS board losing power after endstop installation

Have you tried plugging in the plugging the Z and/or Y end stops into the X position? This could tell you if it's actually the end stops or the board. EDIT: Also, if the Z and/or Y end stops seem to ...
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3 votes
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Connecting Sain Smart Mechanical End Stops to Ramps 1.4?

The multiple connections are redundant. Your picture indicates the wires labelled as "SIGNAL, GND, GND, VCC". This is correct if the board is a "standard" mechanical endstop v1.2. The two middle pins ...
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2 votes

Is cutting the arm off the Z-axis switch a good idea?

While I haven't seen this on a Z axis for a printer personally, there is no reason it wouldn't work, and would improve your repeatability in theory. Removing the arm on the switch is taking away the ...
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  • 417
2 votes

Homing a stepper motor as an extruder using E0/E1 with an limit switch and end stop

The edited question appears to mention that the actual extruders of the print head need to home / limit themselves. The answer is that this is not required. When operating direct or Bowden driven ...
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  • 30.4k
2 votes

Unable to install auto-bed levelling sensor into my Anet A8

The sensor is working correctly, but the signal is inverted. Take the obvious solution: invert the endstop from being normally open to normally closed or vice-versa in your firmware. If you still ...
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2 votes
Accepted

How do the MAX endstops work?

You should see MAX endstops similarly as MIN endstops, or as an additional option to protect the printer: Similarly seen as MIN endstops, you would define in the firmware that you are using them to ...
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  • 30.4k
2 votes

Which endstops are most precise?

I think there are several factors involved in which sensors are best, but the general ordering for me would be Hall, Optical followed by mechanical. All of the types will be subject to some drift due ...
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  • 121
2 votes

My DIY printer only boots when all my endstops are triggered. Why is that?

It ended up I had like super cheap endstops that were actually shorting VCC to GND, as suspected by r_ahlskog. Just bought other ones and now it's working fine.
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  • 183
2 votes

Reprogram Marlin to assign endstop pins to arbitrary tasks [Arduino Mega]

Apparently, given one has already enabled USE_<AXIS>_PLUG (for example <AXIS> = XMIN) in Marlin's ...
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2 votes
Accepted

Ender 3, why only 3 limit switches?

You only need 3 switches to determine/fix the position of the carriage (carrying the hotend) with respect to the printer frame (for X, Y and Z i.e. 3 dimensions). Firmware setup, by defining the ...
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  • 30.4k
2 votes

Ender 3, why only 3 limit switches?

Because it knows the side of the build volume, all it needs to know is one physical location to home from. So knowing {x,y,z} (0,0,0), and knowing x(max) = 230, y(max) = 230, z(max) = 250, and ...
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2 votes
Accepted

Issue with Z homing on Ender 3 Pro with Marlin

I've actually found what the issue was. It turns out that my Z steps were way out of whack (i.e. 4000 steps/mm instead of 400). Apparently, that's the default value in GitHub for version 2.0 of Marlin....
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  • 41
1 vote
Accepted

How to set Home Offsets and Manual Home definitions in Marlin correctly?

Normally you wouldn't use the MANUAL_xyz_HOME_POS at all. Home your machine. Use a caliper or ruler to measure the distance between the nozzle and the edges of the ...
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  • 1,182
1 vote

Y-min stay triggered

This MKS-GEN-L board is in essence a plain RAMPS board, and as such it uses the same pinout apart from some specific pins. Do note the include of the RAMPS pinout in the MKS-GEN-L at the end of the ...
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  • 30.4k
1 vote
Accepted

BigTreeTech mini e3 V1.2 endstop installation

You do not need to connect the red (+) wire of the endstops. The controller board uses a technique to ensure the signal is 3.3 V or ground, see the top left schematics of this link (will insert ...
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  • 30.4k
1 vote
Accepted

Tevo tarantula Z- port burnt

Assuming line 585 of Configuration.h looks like this ...
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  • 5,707
1 vote

Limit Switch problems on RAMPS 1.4 and custom built 3D Printer running Marlin 1.1.0-rc6

Considering you're having issues with the board, and the limit switches appear to be registering, but the board isn't doing anything about it, a first good step would be to update the firmware to 1.1....
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1 vote

Homing a stepper motor as an extruder using E0/E1 with an limit switch and end stop

I think the question has already been answered(if at all possible because the question is still not clear exactly what you mean), but let me try putting this a different way. You have to ask yourself ...
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