Home Z axis just go higher and higher. X and Y OK

[sebi9]

Hello,

with G28 X0 Y0 , it works well to home X and Y axis,

But for Z axis : G28 X0 Y0 Z0 it just goes higher and higher

So, when I print, It prints 2 cms above the level.

With G29, it goes higher too.

Could you help me?

ps :
Z axis is in the right sense on the printrboard (checked twice with pictures on the website), and probe sensor is working well.

Thank you!

[frankv]

You have a broken wire between the Z sensor and the Printboard.

[sebi9]

even if the light works well on the sensor?

Other question : if I put more slowly the printing speed, do I need to put the extrusion speed lower?

[frankv]

[RetireeJay]

[Mooselake]

For a test you can manually set the Z position with the power off (like rest the extruder on a piece of copier paper somewhere around the center of the bed), comment out the G29 and any reference to homing Z (like Z0 on a G28), and try to print.

The firmware will assume that the Z position at power on is Z0 (that's how you print without any home switches). You can't compensate for a tilted bed, but it'll help you figure out what's broke, and might get you going until you can sort out the probe issue and/or get a replacement. It could be worth a try.

Kirk

[2Mylent]

To know if this comes from the Z-Probe technician Printrbot made me do:
1) M119 for the state of EndStop (note the results)
2) disconnect switch Y
3) cabler Z-Probe on the Y connector
4) M119 again (compare with previous results)

[sebi9]

It's OK, I use it before Y stop. I remove G28 and G29 on cura, I begin at the right level, and I do a skirt while I adjust manually the Z height to be at the exact height. It works well.

[Mooselake]

Open a ticket with the place you bought it from, and get a new probe under warranty.

Kirk