Perimiters interrupted print poorly.

Not quite sure how to describe it. I'm having a couple of issues with printing. My first problem being with perimiters that are "interrupted" as in have a screw hole in them or some other type of hole. If you look at the first print a little overhang curling aside, the layers before and after any "interruptions" have a smooth surface. It's the layers with "interruptions" that print poorly. It's almost like it doesn't easily begin again after moving past the "interruption"

Pic 1

Secondly, the top layers arent 100% fill like they should be.
Pic 2

Printing Makerbot PLA @ 190, 30mm. Have a Direct Drive Extruder with a MK7 Gear, Nema 17, and a Ubis Hot End. Nozzle is .35 and layers are .20. Heated Bed's on 60.

Any ideas on what I should look at?

Here are details from M503

Send: M503
Recv: echo: Steps per unit:
Recv: echo: M92 X78.74 Y78.74 Z4000.00 E96.46
Recv: echo: Maximum feedrates (mm/s):
Recv: echo: M203 X30.00 Y30.00 Z0.50 E30.00
Recv: echo: Maximum Acceleration (mm/s2):
Recv: echo: M201 X1800 Y1800 Z1800 E1800
Recv: echo: Acceleration: S=acceleration, T=retract acceleration
Recv: echo: M204 S1800.00 T600.00
Recv: echo: Advanced variables: S=Min feedrate (mm/s), T=Min travel feedrate (mm/s), B=minimum segment time (ms), X=maximum XY jerk (mm/s),  Z=maximum Z jerk (mm/s),  E=maximum E jerk (mm/s)
Recv: echo: M205 S0.00 T0.00 B20000 X20.00 Z0.40 E5.00
Recv: echo: Home offset (mm):
Recv: echo: M206 X0.00 Y0.00 Z0.00
Recv: echo: PID settings:
Recv: echo:  M301 P22.20 I1.08 D114.00
Recv: ok

Edited 2 time(s). Last edit at 09/11/2015 04:50PM by FA-MAS.

How are your z-axis screws attached to the stepper motor?

They're connected with properly printed couplers like the one in the picture. They printed well before, I'm not sure why they're not printing equally as good again. I've watched them during print, doesn't look like they're slipping or sliding at all.

Edited 1 time(s). Last edit at 09/11/2015 08:12PM by FA-MAS.

When doing manual z-moves do you see any wobbling? Also, what kind of printer do you have?

1. Could be as simple as adjusting the speed (acceleration and jerk check too) and temp.
When the line ends at a hole the ilament has to go somewhere, if the nozzle changes direction 180° it can leave a small blob - which on small parts can cause the temp in the area to stay higher for longer.
Try printing the part as a double, this way there is more time to cool down, if the parts look much better you know it is a temp or cooling down issue.

2. Looks like the width of the infill is set too thin, try 10% more than what is set for outside perimeters.
If you have not done a full calibration of your extruder and stepping do so to avoid troubles in the long run.

Also try different speeds, slightly like 10mm/s faster or slower.
I noticed depending on the color and brand filament reacts quite differently to the extrusion speed.
I have a grey ABS that simply looks like crap if you print too slow, while some PLA really does not like high printing speeds at all.
My white PLA is a good example of that, whith the same speed as for other PLA types the surface looks like ground up chalk, only at very slow speeds the surface becomes a bit smoother.