[Filament "drops" falling from extruder while the head travels]

Hi Didier!

Yep retraction is enabled and the values on the UM2 lcd screen are:

Retract length: 5.50mm

Retract speed: 35mm/sec

Yes i know that is experimental but i'v tried with the "old" 15.06 and with the stable 15.04 and the stringing is still there!

[Filament "drops" falling from extruder while the head travels]

Hi, i'm using latest Cura 1.99 build 17112015 and i'm facing this little "problem".. it's not causing bad prints but i think that is anyway something strange, nothing similar hasn't happened until now, here's an image to explaint what i'm seeing:

what can it be??

[KISSlicer / 14.07]

I've got the same problem, Did you manage to find a solution to this?   I've been trying all evening but no joy yet.

 

Nope, i've switched back to Cura but @inventabuild 's reply can be useful.. worth a try ;-)

[KISSlicer / 14.07]

Hi all!

I'm trying to use Kisslicer with my UM2 using the prefix and postfix from @das_enginer

 

G21 ;Metric Values

G90 ;Absolute Positioning

M82 ;Extruder to Absolute

M106 S0 ;Fans Off

G28 ;Home All Axes

G1 X5 Y10 F9000 ;Move Head to ~Origin

G1 Z20 F9000 ;Raise Bed to Head

M140 S ;Set Bed Temp

M190 S ;Wait For Bed to Reach Temp

M109 T0 S ;Set & Wait Head Temp

T0 ;Select Extruder 1

G92 E0 ;Zero Extrude L

G1 F100 E18 ;Forward 18mm @ 100mm/min

G1 F50 E28 ;Extrude 10mm @ 50mm/min

G92 E0 ;Zero Extrude L

T0 ;Select Extruder 1

M104 S0 ;Head Temp Off

M140 S0 ;Bed Temp Off

G91 ;Relative Position

G1 E-1 F300 ;Retract 1mm

G1 Z+0.5 X-20 Y-20 F9000 rop, Move Head

G90 ;Absolute Position

but when the print starts the nozzle is to close to the heated bed, in fact it touches the bed, why??

UM2 firmware is 15.02.1.