K8200 problems with filament feed

Hi - When I try to print, the K8200 goes through all the motions, except that the feed motor kicks & bucks & will not feed the filament, as for some reason, the filament seems to get stuck as a plug in the isolating tube, and as a previous correspondent mentioned, it is extremely difficult to clear. Even when it has been cleared & I re-try, the same thing happens, despite the extruder being at 190 degrees C OK.
Also, for some reason, when returning the extruder to HOME positions, the X & Z axes HOME buttons, in manual control, work fine, but the Y axis HOME button merely advances the extruder about 2 mm AWAY from its HOME position at each touch. Can anyone suggest any ‘fixes’ for these problems, please. I am getting towards my wits end. Thanks

Did you change the firmware of the controller?
If so, which Arduino version did you use for compiling and uploading?

Sounds like you have a non working firmware.

[quote=“fodenfella”]Hi - When I try to print, the K8200 goes through all the motions, except that the feed motor kicks & bucks & will not feed the filament, as for some reason, the filament seems to get stuck as a plug in the isolating tube, and as a previous correspondent mentioned, it is extremely difficult to clear. Even when it has been cleared & I re-try, the same thing happens, despite the extruder being at 190 degrees C OK.
Also, for some reason, when returning the extruder to HOME positions, the X & Z axes HOME buttons, in manual control, work fine, but the Y axis HOME button merely advances the extruder about 2 mm AWAY from its HOME position at each touch. Can anyone suggest any ‘fixes’ for these problems, please. I am getting towards my wits end. Thanks[/quote]

Dumb question, the K8200 stock / default extruder is for 3MM filament, are you using 1.75MM?

[quote=“danielchow”][quote=“fodenfella”]Hi - When I try to print, the K8200 goes through all the motions, except that the feed motor kicks & bucks & will not feed the filament, as for some reason, the filament seems to get stuck as a plug in the isolating tube, and as a previous correspondent mentioned, it is extremely difficult to clear. Even when it has been cleared & I re-try, the same thing happens, despite the extruder being at 190 degrees C OK.
Also, for some reason, when returning the extruder to HOME positions, the X & Z axes HOME buttons, in manual control, work fine, but the Y axis HOME button merely advances the extruder about 2 mm AWAY from its HOME position at each touch. Can anyone suggest any ‘fixes’ for these problems, please. I am getting towards my wits end. Thanks[/quote]

Dumb question, the K8200 stock / default extruder is for 3MM filament, are you using 1.75MM?[/quote]

[quote=“ichbinsnur”]Did you change the firmware of the controller?
If so, which Arduino version did you use for compiling and uploading?

Sounds like you have a non working firmware.[/quote]

[quote]I did not change the firmware, in fact, I am afraid I do not really know how to do that. I am merely using the code from the building/using instructions from Velleman. I was trying to print out the circuit board cover, which is the first task after building, & I don’t really understand about Arduino & its uses, either. [/quote].

I recently reconsidered your first post.

Your Y axis problem can be caused by a wiring fault in the endstop wiring.
Unplug the Y endstop plug and measure if it is conductive when the switch is NOT pressed.
If there is no connection recheck the wiring for open circuit or connection of the wrong pins on the microswitch.

The Endstop circuit operates in “normally closed” mode.
So it should be a closed circuit if the switch is NOT pressed and an open circuit if the switch IS pressed.

btw. for black filament try slightly higher temps. (around 200 - 210°c)

Thank you - I’ll try that.

[quote=“ichbinsnur”]I recently reconsidered your first post.

Your Y axis problem can be caused by a wiring fault in the endstop wiring.
Unplug the Y endstop plug and measure if it is conductive when the switch is NOT pressed.
If there is no connection recheck the wiring for open circuit or connection of the wrong pins on the microswitch.

The Endstop circuit operates in “normally closed” mode.
So it should be a closed circuit if the switch is NOT pressed and an open circuit if the switch IS pressed.[/

Thank you. I’ll give that a try.