Unanswered Print head pressing on Bed for first layer

Hello everyone,

My robo3d has been printing fine all along but recently the print head has been pressing on the bed while printing the first layer... however, it'll raise and print as usual for the 2nd, 3rd, 4th etc layers.. I can see the printer head drawing the outskirt and first layer but no filament could be dispense because the head is pressing right against the bed.

I've tried adjusting the Z rods, and tried several different eeprom settings on Z but after it "auto-calibrates" prior to printing the print head will press back on the bed again...

Please advise.

Regards,

 

Hi Mark,

My initial Z offset was just the default settings, 0mm.

I forgot to mention, this is a new computer im setting it on.. however i did copy the exact settings. When I plug it back into my old computer, it printed fine again. Both my computers use mattercontrol 1.4.

 

How weird. Mine did that for a while and I ran it through the manual level calibration cycle again and it seemed to fix it.