Printing with wrong extruder head.... what's wrong?

[Dwayne Schnell]

I'm using a Replicator 2X, Firmware 7.6. Makerbot Desktop 3.8.0.480

I've duplicated the "standard" profile and modified a few speed and temperature settings. That's it. 

I select my model and use the info box to choose the left extruder (for the red color of choice). When I preview - looks good (red). When I load it into the printer (via SD card), and start printing - it heats the right extruder, then prints the little straight line at the front with the right extruder (black), then goes through the motion of printing the base, but nothing comes out (assuming it is now using the left nozzle, which didn't get heated up, and fails). Using a regular profile works as expected.

Anyone ever seen this? Solutions? (besides switching the filaments around, etc).

[House Fly]

I had the same issue upon upgrading to 3.8, went back to 3.7 and all is back to norm. I'm pretty new to 3d printing, so I may be way off on this.. Try an older file that was sliced with 3.7, it worked for me, but anything in 3.8 did exactly as you described. did a little digging in the profiles, and kept comming across the left as extruder "0" and the right as extruder "1" in 3.7. In 3.8 the same profile after slicing would come up as left extruder "1" and right extruder "2".
Again, I'm new to all this so mabye the issue is deeper then that, and not just overlooked code.

I'd be interested in finding a solution as well.

[Dwayne Schnell]

Interesting… 3.8 gives me normal results any other time - it is in the duplicated profile that things get messed up. I will have to dig some more. I’m learning more about gcodes and slicing with Slic3r and ReplicatorG… no success yet there either. I’ll update here as needed.

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[Dwayne Schnell]

So here's what I've found:

The duplicated profile does not give the correct g-code for the left extruder. I don't know why (bug).

I exported the same object using the default standard, and the duplicated profile (as gcode instead of x3g) and compared them in a text editor. The tool change and temperature settings were for T0 instead of T1 - there's the problem. Somehow the duplicated profile doesn't respect the extruder choice per object.

I manually edited the gcode, then processed it with ReplicatorG. Then tried printing - but my gantry wouldn't home properly (kept crashing) - I didn't investigate why - I didn't change any homing gcodes.

So I reverted to simply modifying the standard profile to match my desired settings. (I'm trying TPE).

And, after a few clogs and messing around with the soft filament, I was able to half print a small test house object. Pretty good (it came off my bed - I will try helper discs or raft next time). The stuff is flexible, yet really strong - even with 2 walls and 10% infill. I could not destroy it (only 5/8" square though, so hard to get a good grip).

Anyway.... That's where I'm at.

[House Fly]

Thanks for the update, that's pretty similar to what I found, I'll try as you did to edit the profile, and change the homing.
I'll post results