seperate retraction at Tool change

[Zennix]

It would be very helpfull for dual nozzle prints to set a different retraction for normal retraction and tool or layer change retraction.
My Felix 3.0 printer works great with a retraction of 4 mm at normal moves with one nozzle. But this is to short for a two nozzle print I have got oozing.
When I set the retraction to 12mm the oozing is ok, but the print takes much longer because all retraction in normal moves needs more time.
My feature request is the possibility to set retraction distance during the layer to 4mm and the retraction distance at a tool change to 12mm.

Thanks / Greeting / Thomas

[dennisjm]

This is very related to the purgewall feature. There is another thread or two on why purge walls don't work with S3D. You can _almost_ do it with the tool change and layer change gcode scripts but one of the main issues is that you don't know which tool your changing to. So in this case, you don't know which tool to retract and which tool to advance in the script.

So anyway +1 to purgewalls and also +1 to better gcode customization so you could do something like this or purgewalls or other custom needs if you had the desire.

[lkeppner]

I just upgraded my Airwolf HD to a dual extruder yesterday and have been playing with several prints. The sample gcode scripts provided were created with Cura and allow for the recommended 7mm retraction AND a 20mm retraction on tool change. This works wonderfully. However, in Simplify there is no retraction distinction for tool changes and I am having significant oozing with the non-printing head which them leaves a lot of debris on my part when crossing the perimeter. I am adding my request also to this thread to allow us to specify a tool change retraction setting.

I see there is a tool change code script and if this could be used to implement this feature, I would add it if I knew the necessary code.

[spineytoad]

have you gotten the tool change figured out? I got this script from the developer
G92 E0
G1 E-10 F3000
T[new_tool]
G92 E0
G1 E10 F3000

I also added a dual head extruder to my airwolf, I have been trying to find someone that has had success with simplify3d and the airwolf, is it working good for you?