Ender 3 V2 with BLtouch Z axis will not decrement #1273
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main board 4.2.2 firmware Ender3V2-422-BLTUBL-MPC-20240125.bin The Z-axis servo seems disabled. It only moves in the positive direction and will not go all the way down to the bed. I feel like there is a fault tripped somewhere and I can't figure out where. I've got all source and am looking through it to figure out why I can't get things to work. Suring auto home BL goes red then moves to X Y limit then center of bed then pin is pushed out twice then BL turns blue and moves in Z pos direction. Every time I home Z the hot end is moved up in the X+ direction and I can't get it to move downwards. even using Pronterface com. Any ideas? |
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Replies: 4 comments 4 replies
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Z-axis cannot be moved below 0 value - if printer correctly homes Z then this position is set as "0". You'll need to set Z offset to move "below" 0 (in fact, it just lowers the 0 physical position). |
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I can not home the Z axis successfully as it fails which means the printer doesn't know where it is in space. When I set the Z-offset to a negative number there is no change in behavior. I feel I have tripped a software fault for the z axis. when M999 is employed on pronterface it doesn't clear the error. Could the BLtouch be broken? I checked all wiring and continuity and everything is working. I can't find where in the Marlin code a fault is being tripped so I can create the proper conditional statement or disable the error. No bed crashing is going on . |
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The probe is wiring incorrectly or in an incompatible way. Using the color of the original BLTouch wiring as a reference, check the white and black wires. |
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brown red yellow black white on the board connector and BL touch. Continuity checked but now I'm soldering into the pins and will reassemble connector and retest continuity. BTW I like your firmware which I have compiled my own version as I want to play with it. From the moment I boot the Ender I can't home or move downwards I had it wired wrong but it was fixed and that is why I think the sensor is bad and why I'm using a better connector with soldered wiring just in case it is poor connections. |
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Mriscoc was right and in the end it took me spending some time creating good connections, soldering the pins and now everything is working |
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brown red yellow black white on the board connector and BL touch. Continuity checked but now I'm soldering into the pins and will reassemble connector and retest continuity. |
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G V In G Out |
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BTW I like your firmware which I have compiled I had it wired wrong but it was fixed and that is why I think the sensor is bad. |
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brown red yellow black white
G V In G Out
on the board connector and BL touch. Continuity checked but now I'm soldering into the pins and will reassemble connector and retest continuity. BTW I like your firmware which I have compiled my own version as I want to play with it.
From the moment I boot the Ender I can't home or move downwards
Where in the code is the z axis error triggered? Initialization? Is that why you think it is the wiring?
I had it wired wrong but it was fixed and that is why I think the sensor is bad and why I'm using a better connector with soldered wiring just in case it is poor connections.