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Cleaned out both extruders. Put everything back together, checked settings, leveled the plate, and the printer is doing the exact same thing! It is acting like it is printing, but no filament is coming out. Any ideas?

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What filament are you using and what temperature is the extruder set at?

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When you load filaments is it coming through?

If yes, What slicer are you using? I started straight with simplify 3d, my errors that caused this was:

1) wrong material selected (temperature was 50C too low)

2) I had the fan on max for abs starting at level 1; which cause it to cool too quickly and it would clog the extruder.

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That’s what I’m thinking, not machine, but slicer settings.

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I use Simplify3D and PLA at ~230 and ABS at ~205.

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Did you swap those?

You need to use 205 for PLA and 230 for ABS.

Did you load your filament through the firmware? Does the filament flow freely while loading?

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Nope - I used to use 230 for ABS but recently my prints were coming out bad. Some threads suggested ~200 so I set it to 205 and haven’t had a problem. I think my problems could be due to a a change in room temperature.

For example - ABS vs. PLA: Pros and Cons of Each 3D Printing Filament

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Is your filament diameter greater than 1.75mm? If it’s not feeding through at all your filament may just have a buldge in it.

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I have somewhat the same issue. The print start perfectly then after a while (random) the print behaves like everything is OK but no filament is coming out. This happens with ABS and PLA using simplify 3D or flashprint… Loading the filament works perfect and the filament freely come out… I suspect the spool being too hard to spin… So at a certain point the extruder cannot get filament anymore. I am trying now with a new spool holder… I also suspected my printer not to be week leveled (not the bed, the printer itself). So I changed where the printer is lying… Note: this happens only on my left extruder…

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205 is not hot enough for ABS

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I don’t know what you tell you - I must be able to bend the rules of physics then:

http://imgur.com/a/jIwZr

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The PFTE tube inside the nozzle may be the problem,

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If plastic is coming out of the extruders when loading bed could be too close to the nozzle try reloading with the bed further from the nozzle. Also 230 is way too hot for PLA I normally run between 180 and 190 depending on brand

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Today I did some big prints with my new spool holder and the issue seems to be gone… The spool I made can be seen here : http://www.instructables.com/id/Spool-Holder-for-Flashforge-Creator-Pro-FFCP/

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Can you push filament through manually?

If you can then my best guest is the filament drive gear. It may have crude on it and can’t grasp the filament to push it through or alternatively the gear that pushes the filament up against the drive gear isn’t tight enough that the drive gear can’t grasp the filament.

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I am using Flashforge’s PLA filament. The extruder is set at 220.

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I can push it manually, then it stops. I just took everything apart, did not brush off the drive gear as it looked ok, soaked extruders. When I put it back together, loaded the filament, and one small strand came out and stopped!

If the gear that pushes the filament up against the drive gear isn’t tight enough, how is that fixed? Can it be tightened somehow?

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Are you sure you lined the drive feed back up correctly when you put it back together. If it is off it will not feed correctly.

Is the stepper motor running?

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You can push it manually through before it stops going through? Or are you saying that when you push the filament through manually it is fine but when the printer tries to feed it through it will stop?

If it is the first I would imagine there is still a clog. If it is the second then I think the spring to the extruder is miss-aligned or the bolt needs to be tightened a bit more. Could also be the drive gear is getting worn and needs to be replaced.

Have you checked out the troubleshooting section onthis page: Flashforge Professional 3D Printer Manufacture - 浙江闪铸三维科技有限公司.

Also just a side thought, have you tried printing with a different filament? Bad filament could be the culprit too.

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Not sure what you are trying to show me here but that black rectangular cube you printed does not look very good if you are trying to prove to me 205 is an excellent temperature to print ABS. You are most definitely having bridging issues. You should probably use a cooling fan for bridging if you are not. How could it possible hurt to use a higher temperature? But whatever works for you. PLA melts at a much lower temperature than ABS so it would make more sense if you use 205 for PLA and 220-240 for ABS.