For endstop it’s common to use SPDT<\/strong> switch (S<\/strong>ingle P<\/strong>ole D<\/strong>ouble T<\/strong>hrow) more information here<\/strong><\/span><\/a><\/p>\n <\/p>\n <\/p>\n <\/p>\n <\/p>\n <\/p>\n <\/p>\n <\/p>\n <\/p>\n <\/p>\n In the official smoothieboard endstop documentation \u00a0 \u00a0 \u00a0 http:\/\/smoothieware.org\/guide-endstops<\/a><\/strong> And when you see your smoothieboard , you can guest when endstop is hit the \u00ab\u00a0O Volt<\/span>\u00a0\u00bb go to the Signal pin<\/strong><\/span><\/p>\n <\/p>\n If you beginner to wiring endstop in input of microcontroler may be you ask at yoursef two question.<\/p>\n – Why use only 2 wire and don’t use 3 wires Ground (-)<\/span><\/strong> \u00a0 Signal<\/strong><\/span> and VCC<\/span> (+) ?<\/span><\/span><\/strong><\/p>\n The answer or there question are not specific for smoothieboard, the technology use is same when connect switch SPDT or pushbutton in input of electronicboard ( arduino, 3d printer board, etc … )<\/p>\n <\/p>\n <\/p>\n Use 3 wire is Ok, it’s works<\/strong><\/span> – when endstop don’t hit, the signal pin of \u00e9lectronic receive <\/p>\n <\/p>\n <\/p>\n <\/p>\n <\/p>\n For each endstop, it’s better to\u00a0connect C to Signal and NC to Ground because<\/span> this means the digital input pin ( endstop connector ) will be connected to Ground in it’s normal state and cut from Ground when the button is pressed. This approach is less prone to noise than the reverse. See here<\/a> for more information.<\/p>\n Another positive effect of this approach is<\/strong><\/span>, that if a wire breaks for some reason you get the same signal as if the endstop is pressed. That makes sure that even with a damaged wire you are not able to overrun the endstop.<\/p>\n [\/et_pb_text][et_pb_text admin_label=\u00a0\u00bbText\u00a0\u00bb background_layout=\u00a0\u00bblight\u00a0\u00bb text_orientation=\u00a0\u00bbleft\u00a0\u00bb use_border_color=\u00a0\u00bboff\u00a0\u00bb border_color=\u00a0\u00bb#ffffff\u00a0\u00bb border_style=\u00a0\u00bbsolid\u00a0\u00bb]<\/p>\n Below \u00e0 explain of\u00a0James Lewis<\/a>\u00a0the creator of\u00a0https:\/\/www.baldengineer.com\/<\/a>\u00a0and\u00a0http:\/\/addohms.com\/<\/a><\/span> youtube chanel<\/span><\/strong><\/span><\/p>\n![\"info-endstop-eng\"](\"http:\/\/www.makerslide-machines.xyz\/wp-content\/uploads\/2016\/07\/info-endstop-eng-1.jpg\")
<\/p>\n![\"doc-endstop-smoothieboard\"](\"http:\/\/www.makerslide-machines.xyz\/wp-content\/uploads\/2016\/07\/doc-endstop-smoothieboard.jpg\")
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\nhave this drawing \u00a0and it’s write \u00a0 \u00ab\u00a0Wiring a basic NC endstop<\/strong>\u00a0\u00bb<\/p>\n![\"vue-endstop-smoothieboard\"](\"http:\/\/www.makerslide-machines.xyz\/wp-content\/uploads\/2016\/07\/vue-endstop-smoothieboard.jpg\")
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Why use only 2 wire and don’t use 3 wires Ground (-)<\/span><\/strong> \u00a0 Signal<\/strong><\/span> and VCC<\/span> (+) ?<\/span><\/span><\/strong><\/span><\/h4>\n
![\"ENDSTOP-3-WIRE\"](\"http:\/\/www.makerslide-machines.xyz\/wp-content\/uploads\/2016\/07\/ENDSTOP-3-WIRE.jpg\")
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\n– when endstop push, the signal pin of \u00e9lectronic card receive 5Volt to send information \u00ab\u00a0endstop push\u00a0\u00bb<\/p>\n
\n0 Volt to send information ‘endstop don’t hit<\/p>\n
\nIt’s works, just have 3 small\u00a0disadvantage<\/span><\/strong><\/span><\/p>\n\n
\nA little more money and time to prepare<\/li>\n![\"touch-plate\"](\"http:\/\/www.makerslide-machines.xyz\/wp-content\/uploads\/2016\/07\/touch-plate.jpg\")
<\/li>\nWhy use normaly closed endstop and use \u00ab\u00a00\u00a0\u00bb Ground to send the information endstop push ?<\/strong><\/span><\/h4>\n
<\/h4>\n
What need to know when use only 2 wire for connect switch or push button to microcontroler board ?<\/span><\/span><\/h4>\n