Kossel Pro settings

[SteveIsHeer]

Has anyone been able to successfully dial in the settings for the Kossel Pro using PLA? I'm having much difficulty getting the extrusion rate tuned and as a result it fails on the infill function. I'm seeing great perimeter extrusion but the infill becomes messed up after the first layer of infill prints. All later layers seem to not be extruding enough.

[JoeJ]

It looks like the entire print stopped extruding, not just the infill. Maybe due to a clog? I would try running at a lower default printing speed and also maybe try increasing the temperature by 5-10 degrees. That will help the filament flow easier.

[SteveIsHeer]

I sorted the issue out. Turns out the hotend thermistor had a broken wire inside the heat block. I had to replace the thermistor and now it works again!

I still have an issue that I'm having a hard time sorting out. I am trying to use start gcode script to move the print head off to the side while heating up to avoid oozing in the middle of the bed plate only to have it drop and start printing in the middle of a pile of oozed plastic. (I don't get much ooze but any at all in line with the nozzle when it lowers to start printing gets picked up by the hot nozzle and I don't like that!) Problem is the Temperature tab setpoints trigger the hotend to start heating immediately at the beginning of the created gcode from the slicer and thus is already starting to ooze slightly while still running the auto bed level routine. I am trying to start the heat process AFTER the auto bed level routing is complete. If I don't put an entry in the temperature setpoint for layer 1 then the hot end only heats to approx. 170 and never reaches the temp I tell it to reach in the script. Same thing happens if I create a setpoint to set the extruder temp to 0. Since this slicer is built in, I can't find any other way to accomplish this. Here is the start gcode I am trying to implement:

G28 ; home all axes
G29 Z9.7 ; level bed with correct Z-offset
G90 ; set absolute coordinates
G1 X80 Y-90 F7800 ; move to front right corner
G1 Z5 F1000 ; move nozzle close to bed to keep ooze minimal
M109 S205 ; set extruder temperature and wait till target temp is reached <<<This doesn't execute because the slicer has already started heating
; G4 P60000 ; wait another 60 seconds for nozzle length to stabilize
G1 X90 Y-80 Z0.25 ; drop down to .25mm from bed and over 10mm to avoid dropping into any oozed plastic before a wipe
G92 E0 ; reset extrusion distance
G1 E10 ; Anchor to bed with a 10mm extrusion
G1 X90 Y-70 F7800 ; and wipe

Here is the first bit of exported gcode the slicer creates to show what I mean:
(Simplify3D slicer puts the first 5 lines ahead of my start gcode script in its output gcode)
G90
M82
M106 S255
M140 S27
M104 S0 T0 <<<---Tried setting the Temperature for layer 1 to 0 to replace the 205 I had there before but my M109 command only gets me to the 170 temp
G28 ; home all axes
G29 Z9.7 ; level bed with correct Z-offset
G90 ; set absolute coordinates
G1 X80 Y-90 F7800 ; move to front right corner
G1 Z5 F1000 ; move nozzle close to bed to keep ooze minimal
M109 S205 ; set extruder temperature and wait till target temp is reached <<<This doesn't execute because the slicer has already started heating
; G4 P60000 ; wait another 60 seconds for nozzle length to stabilize
G1 X90 Y-80 Z0.25 ; drop down to .25mm from bed
G92 E0 ; reset extrusion distance
G1 E10 ; Anchor to bed with a 10mm extrusion
G1 X90 Y-70 F7800 ; and wipeG92 E0

Anyone know of an easy way to accomplish this?