Mini:

Printed a test print fine plus a larger job was printing fine when I left.

Mini #2: 

Printed a test print fine but failed an ABS print due to the print not sticking.  I adjusted the Z-offset from -1.37mm to 1.7mm to get the first layer bead to look more like the desired shape (flattened instead of round).  I believe this was off since we got the printer.  Sorry for the delay figuring out how to adjust this setting (silly me for thinking the auto-leveling took care of this).  It now seems to match the first layer appearance of the other Mini.

Prusa:   

Printed a PLA test print fine but also had a bed adhesion issue with ABS.  I found that the Z-offset had changed since I rebuilt the head (it was around -2.? mm and I found it at -1.2).  The ABS print was doing well after the change when I left.  I also noticed that the Y-belt does not seem as tight as it should be and the machine makes a rubbing sound every now and then.  Something to look into next week! 

Taz 3:   

 Printed a test print fine.

Taz 5:   

Found the X-axis carriage off level with the bed so I re-adjusted that.  Also, I tried some tricks I found on the web to fix the Z-axis binding issue that the printer has been having.   I leveled the bed and was able to print a 3 hour job fine.