Hi everybody,
I need help identifying the source of my problem with the Z direction movement of my gantry. It doesn’t stop anymore. It started in the middle of a print by scratching a deep gash into my bed, and now, everytime I simply try to home it, it wants to go down forever. I need to switch it off then.
I filmed it in this video: https://youtu.be/934Wq8a5d-w
Where do I even start to look here? Thanks in advance for any help from Germany, MakerMardy
Hello,
There are so many possible reasons.
Have you set the Z offset correctly?
Did you reinstall the latest firmware after performing a factory reset?
The Z offset was perfect throughout the first half of the print, during which it suddenly started doing this. I haven’t reset the firmware yet, will try that later, thanks!
Have you made any hardware changes?
Assuming no the likely problem is the proximity switch on the toolhead. Raise the gantry 100mm or so. Move a metal build plate up and down below the toolhead. Does the LED on the proximity switch on and off?
I don’t own a SV08, but it looks like it’s trying to level the gantry.
I would raise the Z all the way to the top & then do a Homing to see what happens.
Great tip, thank you, @cardoc. Wasn’t the source of the problem, but that made me understand the process of homing in the Z direction. I tested the proximity sensor and then exchanged it with the one from another head I have, and the behavior of the Indicator LED inside the proximity sensor as well as the homing process stayed the same.
That made me exchange the entire head. And now it WORKS AGAIN! Old proximity sensor, different rest of the head. Still no clarity as to the source, but that narrows it down to something on the circuit board inside the head. I’ll keep experimenting. Thanks everybody!
Sounds like your toolhead board has lost the ability to “read” the proximity switch.
I don’t see the toolhead bord at the Sovol store.
How old is your printer? You might get Sovol to provide a replacement under warranty.
Even if you are not covered by the warranty, you can write to Sovol to order a replacement part.
In this case, you will have to pay for it.
check you nozzle!
the first versions of the nozzle do not have a setscrew and can disassemble themselve with these issues. This will cause exactly what you video shows because it cannot lower the gantry far enough anymore to trigger the probe.
This has cost me a build plate and a clean underpants
Yes, exactly, thank you @wrusman , that seems to be exactly what happened.
In this picture, the pushed-out nozzle can be seen next to a newer hotend (with setscrew). I’ll exchange the two. The adventure continues!
