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Wrong Gcode for dual extrusion

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Hi, we were having some issues on dual extrusion printing.  Even when we get to find a solution it would be usefull to know if there is a better way to solve it or if someone else has passed through the same.

Problem 1. After a extruder switch, the new one extrudes a not expected line of material over the object and then starts printing normally.

Problem 2. When printing start layer number 1, the main extruder extrudes a lot of filament. This happen always, even when the main extruder shouldnt be working on that part of the code. On that cases, it continue printing with the wrong extruder only in that layer.

The first problem was on every switch and the second only on the first layer.

- what we did to solve the two things

Solution to problem 1.

- On "PreSwitchExtruder.gcode"

we replaced: G1 E1.92300 F1800.00000

with:               G1 F1800.00000

     

- On “PostSwitchExtruder.gcode”

we replaced:   G1 E2.92300 F1800.00000

with:                 G1 F1800.00000

Solution to problem 2.

On the Gcode, after “Layer1”, we deleted the line

"M126 T0 ; value = 225".

_______________________________________________________

After modifing these things, the print results were good. We dont know if its supposed to be that way or its a bug   of the cura to gcode generator. If someone can tell us why the gcode is created this way, any information and/or an alternative solution to our problems we'll be grateful.

Here some pictures

20160210143429.thumb.jpg.0fb7cfa3bd860cd3744772f12530eb3c.jpg

20160210143428.thumb.jpg.3d0542e34ad842729ffeea3bed2a6746.jpg

5a33181fa8dd8_20160210143428(1).thumb.jpg.ca3997c9af2539055ef738ab7d456a75.jpg

20160210143424.thumb.jpg.43406611e5642350e101f5b937c36e11.jpg

dual_vase_shot.thumb.jpg.e885471188cedb348a385b6790637235.jpg

tree_frog_dual.thumb.jpg.58ac199335c865c1e6481ca5d1e49667.jpg

20160210143429.thumb.jpg.0fb7cfa3bd860cd3744772f12530eb3c.jpg

20160210143428.thumb.jpg.3d0542e34ad842729ffeea3bed2a6746.jpg

5a33181fa8dd8_20160210143428(1).thumb.jpg.ca3997c9af2539055ef738ab7d456a75.jpg

20160210143424.thumb.jpg.43406611e5642350e101f5b937c36e11.jpg

dual_vase_shot.thumb.jpg.e885471188cedb348a385b6790637235.jpg

tree_frog_dual.thumb.jpg.58ac199335c865c1e6481ca5d1e49667.jpg

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