Plastic heating problems

K8200 3D Printer K8200 - Your printer, creations, and ideas for imp
1

Hi everyone,

I have noticed that my last two prints have had problems with the plastic. When it draws the shape around the printed object, no plastic is coming out of the printhead until the very end. Also, as the printhead is printing, sometimes there are small blobs of plastic mixed with continuous lines. It’s as if the printhead isn’t hot enough or the extruder is pulling the plastic filament back too far.

Any suggestions?

Thanks in advance.

2

Hard to say what is going on.
A picture may help
If you are printing PLA the temp should be around 190.
It sounds like the hot end is to hot.
Check the position of the thermistor.

3

look at the filament tension, turn it up with the screw at the top of the extruder.
it will force the filament to get taken by the bearing and get a better unifrom pression.

also try to add thig Gcode command just befor the printing begins : G1 E10 F400 ; prime the nozzle

let me know plz !

4

[quote=“xnordz”]look at the filament tension, turn it up with the screw at the top of the extruder.
it will force the filament to get taken by the bearing and get a better unifrom pression.

also try to add thig Gcode command just befor the printing begins : G1 E10 F400 ; prime the nozzle

let me know plz ![/quote]

Which line is the start of the print? Is there a way to identify it?

5

[quote=“stevemagicianful”][quote=“xnordz”]look at the filament tension, turn it up with the screw at the top of the extruder.
it will force the filament to get taken by the bearing and get a better unifrom pression.

also try to add thig Gcode command just befor the printing begins : G1 E10 F400 ; prime the nozzle

let me know plz ![/quote]

Which line is the start of the print? Is there a way to identify it?[/quote]

hi sorry for the delay.
here s an example of my G code

G21 ; set units to millimeters M190 S60 ; wait for bed temperature to be reached G28 ; home all axes G90 ; use absolute coordinates G21 ; set units to millimeters G92 E0 M82 ; use absolute distances for extrusion M109 S245 ; wait for temperature to be reached G1 E10 F400 ; prime the nozzle G90 ; use absolute coordinates G92 E0 M82 ; use absolute distances for extrusion G1 F3900.000 E-3.00000 G92 E0 G1 Z0.300 F15000.000