Mechanical Endstop v1.2

by MakerBot, published

Mechanical Endstop v1.2 by MakerBot Dec 9, 2010



Mechanical Endstop v1.2 by MakerBot is licensed under the GNU - GPL license.

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Simple, repeatable, reliable

The mechanical endstop is a simple solution to a simple problem. We want to be able to detect when an X/Y/Z stage has reached its minimum or maximum. Instead of messing with flags or complicated light beam interruptors, we use a mechanical switch. If we place the switch in the path of the stage, then the stage itself will simply close the switch when it moves against it. Other than properly positioning the switch, we do not need to modify the stage at all. If you're worried about reliability, you can sleep well at night. The switches we use are rated for 1 million operations before failure. Since we only use the switches once per print, that means you'll be able to do one million prints before having to replace the switch.


Full instructions here: http://wiki.makerbot.com/thingomatic-doc:mechanical-endstop-1-2

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Is TP1 on the circuit stands for the capacitive sensor connection?

here is a working archive of the wiki https://archive.is/UwDFo

That one seems to be dead now

Thanks mate.

Wiki still down, please fix instructions text.

Hi, the wiki is down, is there an other site where i can get more informations ?

What are the changes since Thing 762 (V1.0)?

Would it not make sense to put the resistor and capacitor on the mother board and eliminate this board. = less material to etch, less connectors to cause noise issues.

you could do that. it limits what you can hook up to those ports on the motherboard though. as of right now they're nice, convenient IO.

Well that makes sense. In the next motherboard redesign it may be nice to have the pads for them on the board as an option.

The circuit is so simple that if the switch board and the motherboard had both circuits on it, it would still work fine (it'll just waste a little more power).

So the only thing the Makerbot Team did to this device was replace a opto interrupter with a mechanical switch?

we also switched connectors away from the RJ45. of course we also designed the original opto endstop as well.

Is there anyway for these to work with a cupcake?


There is virtually no difference between this and the opto endstops (besides the sensor mechanism) from how the readings are received. You should not have any problems replacing it with these 8-)

Oh and you need to modify the connector since this uses less wires since there is no anode and cathode terminals.