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[Solved] Z axis wont go down on 4.2.7 mainboard with bl touch firmware (ender 3)


OdgeBodge
(@odgebodge)
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Hi, ive just bought a v4.2.7 mainboard and i cant get it to work with bl touch (v3.1) with any firmware i try. The printer works as expected on the not bl touch firmware. Ive attached a video of what happens when i try to auto home.  The Z axis doesnt move downwards when the printer is auto homing.

 

Ive also added an image of the mainboard if that helps (removed the display connector because its in the way)

https://imgur.com/Epgr34H

 

thanks in advance 🙂

This topic was modified 5 months ago 2 times by OdgeBodge

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Eli liu
(@eli-liu)
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I am not sure if the kind of circuit wiring would work for Creality firmware or not.

This guide will help you go through it. Please read the BL touch section with patience. 

https://forums.creality3dofficial.com/creality-3d-printer-firmware-download-guide/


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Eli liu
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For the answer, you need the adapter for this BL touch.


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Pghoperafan
(@pghoperafan)
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@odgebodge

i have precisely the same issue, the same printer, same BL touch, same motherboard and I’m losing my already frazzled mind.  I’ve tried several firmware updates, but nothing has yielded success.  If you do find a resolution, please let us know.  I’ll do the same.

thanks,

operafan

 


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3nderUser
(@3nderuser)
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Why not black/white connected to G and OUT as it supposed to be??


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OdgeBodge
(@odgebodge)
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@pghoperafan sorry for the late reply i forgot to check this but the solution i found was to just compile marlin myself and i havent had an issue since. I just used auto compile on this site and put in the right settings but you have to pay for a subscription to use it 🙁 https://marlin.crc.id.au/ (the premade ones for the board and printer didnt work at all)

also if you wire it like i do be sure you dont accidentally wire it wrong, i had to swap around the wires on the connector since how it came the mainboard just started smoking when i turned it on but thankfully i was fast enough to turn it off that nothing broke.

This post was modified 4 months ago 3 times by OdgeBodge

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OdgeBodge
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@eli-liu i didnt manage to get it to work with the adapter either 🙁 i just ended up using the firmware builder on the marlin firmware service and that worked perfectly.


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