Retraction
Mixed extrusion has one problem from the beginning: when retracting and undo retraction the speed is divided by the number of extruders used. What is necessary for extrusion is bad for retraction, because the speed gets either to slow or to fast when swiching the number of extruders with the weight feature. Using retraction must drive the motors always with the full predefined speed to avoid blobbing or losing steps. A quite easy approach to handle this retraction with full speed could be matching values for the speed received from the printer with the commands (e.g. G1 e-XX S903) and the speed predefined in RETRACTION_SPEED and RETRACTION_UNDO_SPEED in the firmware. If both values are the same then the retraction is handled with full speed by every extruder, in any other case it's just the given speed divided by the number of extruders. The autoretraction should have full speed for retraction anyway. It would be great if you could change this in the firmware.
Thanks in advance.
Thanks in advance.
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