I have been trying to get my flashforge dreamer to use left extruder for print and right for support material for some months now, and as yet I have not been able to achieve this. I think I have tried everything and a bit more. I am slowly coming to the decision that either Simplify 3d cannot do this [which may explain the complete lack of tutorials on this important topic] or something I am doing is wrong... or not doing. The latest attempt was an answer in forum
"1) first, make sure you are using the stock S3D profile (Help > Configuration Assistant)
2) then set the extruder configuration to "Both Extruders"
3) go to the Supports tab and change the support extruder and dense support extruder (if using dense supports) to whatever you want"
This did not work either::( Just in case I tried setting the support extruder in left as right and the next try was setting the right extruder support as right, Again only right printed. I have also tried many .stl files just in case something was wrong with what I was using.
I would appreciate any help to sort this out