OK…seriously…what the F is this bull crap??? I never had a problem like this before.
Looks like poor fusion between layers. How thick are you running? Nozzle diameter? Material? Temps. The more detail you give the easier to troubleshoot.
With the gaps on the first layer below the spaghetti layer I would say under extrusion due the skipping causing the wrong die swell at the nozzle hence pour fusion. Skipping can be under temps, clogs, boden tube debris, clogged hob, or wrong hob idler tension.
Natural ABS running at 240C. I have printed at 240C with natural ABS before. I already have it at 114% flow rate. It is an EZ-struder extruder in a bowden setup on a Rostock Max.
I think the Onyx heating bed might warp a bit when it heats up.
My heated bed is running at 100C, by the way.
Could ABS shrinkage from cold air possibly explain this?
Do you have glass over your bed? Your ABS shouldnt be shrinking that much that quickly. Try bringing your bed up to 115-120 for your first few layers. How think are your layers? If your going too thick and not getting a good press you can see this.
I think material is fine . Your machine has skipped steps or any one belt might have slipped or loosen
Looks like slipping to me. Check your drive gear for debris and clear it with a exacto or brush.
@Joe_Spanier I do not think those temps are even remotely possible for this heated bed with borosilicate glass. I never needed more that 100C before. This roll is more than half way done.
The extruder’s hobbled pulley does not Look like it is clogged, but it is an EZ-Struder so that does not say much. The thing does not have much grip.
@NathanielStenzel I wedged a but under the spring to increase the holding force. It helped.
That is what happens when you start to print thicker layers without dramatically increasing temperature.
It could be thicker extrusion width, thicker layer height or faster speed. Bottom line, your new filament isn’t coming out hot enough to bond to the previous layer.
Yeah, by guess would be skipping steps or slipping on the filament, but those are just guesses. Under extruding
Ok. I think I figured it out. It seems that I have messed with the settings and increased the flow from 104% to 114%. After putting the temperature at 260C instead of 240C, it decided to print better. Not the best, but better. The thing is, I think I had tried printing at 250C for 104% flow and that did not work. The humidity sure is a killer right now and this printer is not making it any easier on me. The moment I open a window, the prints will be wrecked.
To make matters more complex, I may need to tighten the mounting for nozzle #2. It may be hitting the print and throwing off the coordinates. Sadly, Cura seems to be ignoring the absolute position instruction and making it so I can’t home and resume. Here is my start Gcode.
;Sliced {filename} at: {day} {date} {time}
;Basic settings: Layer height: {layer_height} Walls: {wall_thickness} Fill: {fill_density}
;Print time: {print_time}
;Filament used: {filament_amount}m {filament_weight}g
;Filament cost: {filament_cost}
G21 ;metric values
G90 ;absolute positioning
M107 ;start with the fan off
G10 Z0
G28 X0 Y0 ;move X/Y to min endstops
G28 Z0 ;move Z to min endstops
G1 Z15.0 F12000 ;move the platform down 15mm
G92 E0 ;zero the extruded length
G1 F200 E4 ;extrude 3mm of feed stock
G92 E0 ;zero the extruded length again
G1 F{travel_speed}
M117 Printing…
Have you proven that your thermistor reading matches the real temperature of the filament as it comes out? Raise temp to 280C. Your filament is a long way from degrading if it won’t even stick to previous layers.
@Matt_Kraemer for safety reasons, I think I put in a 260C limit on my hot end. What you are suggesting though is that my thermistor in my hot end is failing?
No, not necessarily failing, but just offset from the actual value. You need to verify it with a non contact thermometer. Also, just because your heater block is a certain temperature doesn’t mean your nozzle or filament ever get that hot.
For fast thick layers 1mm wide on my e3dv5 I print at 290C and the filament isn’t even close to burning.
@Matt_Kraemer I do not think I increased the speed or flow that much to cause a need for that much more temperature to transfer the heat energy per cubic centimeter of filament.
There is a cura plugin based on this concept, so I understood what you meant. I read all about it.
For clarity, I knew what you meant After you said you did not think my thermistor was failing.