Flashforge Creator Dual / Pro How to fix Dual Extruders dragging across prints.

[Geoff]

Hi Guys,

**Update

This thread also contains in the posts below information on how to fix this problem on the NEW flashforges too.

Any of us with the FF or makerbot dual extruder models know the pain. Print anything wider than the distance between the two nozzles and "Griiiind" you get the nozzle drag on the print. This can cause both bad prints, it can mess your hotbed levelling up and at worst, knock your print right off the platform while printing.

There is a very simple fix to this. It requires your stock allen key set for the Flashforge. One for the cooling fan and a small one for the nozzle height adjust.

Photos show the original FF extruders, but even the new ones are pretty much the same, or at least for this procedure.

Undo the two screws keeping the Fan in, just put it to the side (we have no need to unload filament or remove the motor.)

What you are looking for is this little sucker...



Now the obvious first question I had is "Oh man.. how am I going to get these perfectly level?" Answer is ...

I have to be brutally honest here. I made no measurements. I checked no levels.. I simply took a best guess.

First time I tried, I loosened the hex, then I pulled/twisted the nozzle so hard, it pulled almost all the way out! So I thought.. oh no, I messed up here! I only wanted it to move a TINY bit.. now it's completely out!

Turns out, they CAN'T go in too far. Just push the nozzle head up as far as it goes and stop just before you touch the black plastic that's covering the bearing and extruder gear, then do the same to the other one .

The idea is to have one slightly higher than the other (and I do mean slightly! like 0.05mm) Once this is done, run a calibration in your machine from the front panel to make sure it's printing on the bed properly from both nozzles and they are aligned.

I did this personally when the head was mounted on the machine - the photo is just of my spare head, to save me the bother of unscrewing my machine to take a shot

For the more particular people, See the Blue Circle? Now look above the circle. See that little gap between the end of the nozzle and the actual feeder? that's your measurement space there - its much easier to measure that than the nozzle heights.