'basket weave like' extruding problem

I recently made some modifications to my I3, adding an aluminum Y carriage, changing the belts from 0.08" to GT2, pulleys from 20 teeth to 16 teeth, and recompiling the Marlin firmware to configure the settings properly for the new belts and pulleys.
I did go from version 1.0.0 to version 1.0.2 of Marlin.

Now, I'm seeing an odd issue when printing, I am seeing a repeating pattern where the printer is not extruding, it almost looks like a basket weaving pattern.

I think that the extruder may not be pulling the filament consistently. I can see some filament coming out of the nozzle when this is happening, but it is not as much as it should be, it seems to be curling up immediately.

Here is a picture:


I did change to a new spool of filament, and built a PVC (1/2) spool holder, but things do not seem to be binding there (as far as I can tell).

I made no physical changes to the extruder, only whatever is different in the firmware.

Original Firmware settings

Marlin1.0.0
echo: Last Updated: Nov  3 2015 17:02:20 | Author: (John, default config)
Compiled: Nov  3 2015
echo: Free Memory: 3795  PlannerBufferBytes: 1232
echo: Hardcoded Default Settings Loaded
echo: Steps per unit:
echo:  M92 X78.74 Y78.74 Z2560.00 E105.00
echo: Maximum feedrates (mm/s):
echo:  M203 X400.00 Y400.00 Z2.00 E45.00
echo: Maximum Acceleration (mm/s2):
echo:  M201 X1400 Y1400 Z100 E80000
echo: Acceleration: S=acceleration, T=retract acceleration
echo:  M204 S1400.00 T5000.00
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)
echo:  M205 S0.00 T0.00 B20000 X13.50 Z0.30 E5.00
echo: Home offset (mm):
echo:  M206 X0.00 Y0.00 Z0.00
echo: PID settings:
echo:   M301 P19.86 I1.00 D98.93
echo: SD card ok

New Firmware settings

SENDING:M503
echo: Steps per unit:
echo:  M92 X100.00 Y100.00 Z2560.00 E105.00
echo: Maximum feedrates (mm/s):
echo:  M203 X400.00 Y400.00 Z2.00 E45.00
echo: Maximum Acceleration (mm/s2):
echo:  M201 X1400 Y1400 Z50 E5000
echo: Acceleration: S=acceleration, T=retract acceleration
echo:  M204 S1000.00 T2000.00
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)
echo:  M205 S0.00 T0.00 B20000 X20.00 Z0.40 E5.00
echo: Home offset (mm):
echo:  M206 X0.00 Y0.00 Z0.00
echo: PID settings:
echo:   M301 P22.20 I1.08 D114.00

I am hoping that someone may have some suggestions.

EDIT: I should add, that I am printing with the extruder temperature set at 185C.
The first spool of filament I used came with the printer.
This one, I ordered from Amazon (http://amzn.com/B017REHJA0), reading through the reviews today, and it seems that some people had to raise their temps up to 205C in order to print with it.

Thanks!
-Al

Edited 1 time(s). Last edit at 02/14/2016 02:29PM by awdorrin.

Did you check the extruder drive gear for dirt/debris? It looks like your filament is slipping at some points.
Maybe the idler gear has a flat spot?
-Olaf

I installed a tensioner on the extruder several weeks ago, after having issues with the filament slipping.
I did look for material on the gear, and played with adjusting the tension up and down, and did not notice any change in the pattern.

Long week at work, but finally had a chance today to experiment some more. It does appear to have been a temperature issue.
I raised the temperature from 185C to 195C and I am amazed at the difference so far. Looks much smoother and printing very well so far.