Calibrating problem in heigth

[Willtock 1]

Hello guys,

i'm quite new to 3D printing world, i've just bought an UMO+ and build it. But i'm already facing problems that makes impossible for me to print anything. I precise i THINK there's no assemblage problem.

Here are my two problems :

-when i try to calibrate the plate's heigth with Cura, the plate always goes down no matter on which button (Up or Down) i click. I try this with different versions : 15.04.2, 15.04, 15.01, 14.12, 14.09. No one worked correctly. But i can move it down and up with the controller. You can find a video of the problem here :

-my second issue is that when i use "Auto home" function, my printer made this good, but when i start printing something, the plate goes down, and it starts printing with 36mm too much heigth, so the plastic falls from too high. When this happens, i see "Z = 0" on the controller, and when i stop it and use the "Auto home" function, it now indicates me "Z = - 35.09" (which is the anormal distance between the plate and the printer's head). This is always the same distance no matter the heigth of what i print. You cand find a video of the issue here :

I've already post a message on the french community, but in order to be read by more people i also post here.

Thanks in advance for helping me solve this issue!

[neotko 1,417]

Can you post the first 50 lines of that gcode just to remove that from the possibilities of what causes that?

[Willtock 1]

The Gcode is clean, i am sure of that because one french user tested it, and it worked.

I don't have it on me now, i'll post it there this evening.

[neotko 1,417]

https://ultimaker.com/en/marlin/view/15283-ultimaker-z-axis-not-zero-after-homing?page=1#reply-105684

Maybe that's your problem?

Also. Just a weird idea. Maybe the z steps are changed and it's moving more phisically than it should? I would reset settings on the panel and update the firmware.

[Willtock 1]

Yeah this sounds very close (if not exactly the same). I'm in contact with Makershop, is that the right way to get another panel if it is the real cause of my issue? Or should i contact directly Ultimaker staff?

About the settings and firmware, i always create a new machine and update firmware before every test.

[neotko 1,417]

I suppose that (I'm really not sure) you could disconnect the panel and print by usb. Usb printing can give problems since usb can have power changes, but for the purpose of the test you could send the gcode by cura usb with the panel disconnected and see if it makes the same error or it doesn't.

[Willtock 1]

When you say "panel", are we speaking about the same thing?

Electronic panel

Because without this, i can't even connect the printer with USB.

Edited August 4, 2015 by Guest

[neotko 1,417]

Heh no. That's the main board indeed.

[neotko 1,417]

I thought when I did read that other post that the op fixed it by changing the ulticontroller. I did understand it wrong I suppose

[Willtock 1]

To me, the ulticontroller is a receptor concerning the display and an emettor concerning the button, but in no matter a processor for taking decision and saving datas. But please do tell me if i'm wrong!