Creality Hi - MAJOR Z-homing problem

Creality Hi Printer
1

I’m having a major issue with the Hi and the Z-homing. When I try to start a print, which initiates the homing procedure, the Z-axis starts by raising itself completely, does the triple alignment, then drops to roughly 10mm from the bed. All is well until this point.

When the printer does the next stage of the Z-homing, which is when it lowers the nozzle to the build plate, it doesn’t stop. It’s pushing so hard that it’s pushing the X-gantry into an angle, side-to-side and front-to-back. The belt also starts skipping at this point, and the only way to stop it is to power off the printer.

The problem started when I had a cutter issue (the magnet in the extruder body came out). I did the fix on the extruder, put it all back together, then the Z-homing issue presented itself. I checked all PCB connections and all was good, but I did find that I had pulled the wires from the filament cutter sensor PCB, causing 2 of the 3 wires to touch. I did some searches and some people said that they just removed those wires. I tried that, but the problem persists.

Any suggestions?

2

I think it’s a sensor failure. Creality K2 Plus Strain Gauge Accessori per stampanti 3D – Sensore di livellamento automatico del letto ad alta precisione per stampante 3D K2 Plus, calibrazione automatica dell’asse Z, facile da : Amazon.it: Commercio, Industria e Scienza

3

I have a similar issue. My XY axis would get off track during the Z calibration, specifically on the down trip from tapping the top Z sensors. It would be as severe as one side being nearly an inch different from the other, causing it to crash into my plate. It’s not always that severe, and it occurs intermittently. Sometimes I have no issues, and sometimes it’s just enough to start hitting my parts, knocking them off the plate. I have been dealing with tech support for about 2 months and no solution yet. The latest part they sent me was the Nozzle Strain Gauge. Not sure how this could be the issue because this issue happens before the nozzle touches the plate during calibration, and when it happens during prints, it’s usually an hour or two before the issue starts. I’m also not having issues with the first layer. It either happens during calibration or an hour or more into the print. I know this isn’t a solution to your problem, but I just wanted to share that you’re not alone in this problem.