Almost there.... and strange behaviour

Repetier

The reason is simply that you make your fat line before heating the extruder and cold extrusion is disallowed cause it would not work any way. Put it after heating the extruder.

wait ist just a message from firmware that it has finished all commands and wants something to do. Is ok.

boelle

my start G-code heats the extruder.... 

; [mm] mode

G21

; absolute mode

G90

;Home

G28

;Turn on electronics fans

;M42 P? S255

; Heat up bed

M140 S60

G1 X0 Y90 F5000 ; Go to the middle of the front

;Get close to the bed

G1 Z0.05

;wait  for Z to move down

G4 S30

;heat nozzle and wait for it to reach temp

M109 S180

; make a thick line to prime extruder

G1 X50 E5 F200 

;lift Z 

G1 Z0.3

Repetier

Ok, i got fooled by repetiers send ahead which shows heating after command beeing send, but ok it should not get executed before heating is finished.

You should in any case add a

G92 E0

before using extruder. There is also a variable stopping long extrusions but that is normally set to 100mm or so not 5. You could set if you can extruder 10mm with manual control.

boelle

ok, will add the G92 E0 just before the Fat line

will also check how much i can extrude manual... 

it will be at weekend at tonight is going to be assembly of new extruder with better thermistors than before

The variable you talk about that must be in firmware right? or have i by mistake set it in my start G code?

Repetier

Yes, I mean this

/** Prevent extrusions longer then x mm for one command. This is especially important if you abort a print. Then the

extrusion poistion might be at any value like 23344. If you then have an G1 E-2 it will roll back 23 meter! */

#define EXTRUDE_MAXLENGTH 100

boelle

it's set to 160 so should not be a problem.... will test in weekend