BL-Touch Doesnt seem to work?
So I've been using my ender 3 pro for a few months now, and love it... but I found that having to constantly level the bed was doing my head in, so purchased a BL-touch to try and help me save some time.
Installed it pretty easy.. except for not being able to get the software for it (the creality site didn't seem to have a .hex file) but no biggie. I managed to get hold of one (Ender-3Marlin1.1.6BLTouch) and flashed the board.
Since installing it, its been a nightmare. I have followed the instructions in the manual, regarding auto home, setting up the z offset ect, but it seems like no matter what I do, every time I print, it just prints at a random height?
First few times it printed at about 5mm from the board (even though I reset the offset each time) then print 4 it actually dragged on my printing board and damaged it.
I've spent all day today trying to figure it out, and I have to come to the realisation, it doesn't matter what z offset I put in, it just prints at a random height?
Any ideas guys?
I had pretty much the same problem on my Ender 5 except I had no issues with firmware, Creality had it for the upgrade to a 4.2.7 silent motherboard. The BLtouch was a nightmare, I could level the bed manually with a dial gauge, bed was perfectly flat with no warping at all, then run the BLtouch bed leveling and my print's first layer would be terrible, thin in spots nearly scraping the bed, thick in others and not sticking. I gave up after a week of frustration and having to turn off bed leveling every time I needed to print.
The BLtouch cable can be at issue if it's routed anywhere near a step motor or the hotend. Try turning the BLtouch so that the connector is away from the hotend and shielding the cable or replacing the flat cable with a twisted one. It's worked for some.
Did you use the adapter board? I've heard it can make a difference as well...
I returned the BLtouch, bought silicone spacers to replace the leveling springs and now the bed holds level really well. Just crank down on the pads so there's good resistance and they grip pretty good, not losing position to vibratio/heat like the springs can. I'm thinking about getting the solid aluminum spacers to just lock the level in permanently, just haven't decided yet.
I don't know why I couldn't get the BLtouch to work properly, it was like it sent bad information and read the bed wrong. I returned it before I found out about the noise issue with the cable so that could have been the problem, I upgraded to direct drive so the cable ran right by the extruder stepper. I've heard that the EZABL works better but I don't have any experience with it.
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Same problem here. Any advice?