Well, to start i am no expert as i have only one other 3d printer and i can create files for it to print fine. I have been creating files for an anet a8, or a prusa i3 clone if you will with no issues. I adjusted the esteps when it got it and thats it. Now i have a Flashforge that i got used and i cannot get a decent print that i want out of it. I have uploaded a 20mm cube to astrprint, and used their settings for a flashforge and it prints fine. but when i use the same file i used to create a print for the i3 model, it doesn not print right on the flashforge. I have excanged gears, cleaned them, cleaned the exrtruder, changed temps, tinkered with filament size, used makerbot, replicator g, OctoPrint-GPX on a pi, directly connected usb. I have tried everything i can think of and it still underextrudes. I got one file with the machine and can print that ok too, but i cannot create a file other than a test cube at 100% infill that will print right. I know the filament is ok because i have the other printer and it works fine. Same file just different format. I suppose the firmware is different between the two, but i am at wits end! the red print i stopped halfway to make sure the inside was filling right, so i know the printer is capable, but why cant i get a good print otherwise?
SOC3D
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Tell me if I’m summarizing this right: You can create a print file for your flash forge of a test cube at 100% infill and it prints fine. If you try to import a new model with the same settings it doesn’t print? Are you trying more than one model? Can you upload the model or x3g file you are trying to print?
Good Morning,
First, don’t get too discouraged with the Flashforge. Once you get it working right you’ll be amazed at how well it works!
When you say you are using the same file, do you mean exactly the same sliced file, or the same STL but sliced with the appropriate settings for each printer? The file type for the Flashforge should be a .x3g file while for your Prusa it should be a .gcode file. You should be using the appropriate slicing process for each one. If you are trying to use the exact same sliced file to print on both you will have some issues. I assume you already have this part correct, but just verifying 
Depending on what slicer software you use you will probably see a setting named something like “flow rate” or compensation. This is a multiplier setting used to push more or less filament through than the default amount. For example, if you set it at 1.1 (110%) it will push 10% more filament through than it normally would. While it may not fix the problem, one quick test you could do is to increase this value, reslice, and see if it changes the under extrusion problem.
Another option is to test a different slicing software to see what happens. The MakerBot desktop software works great for the Flashorge printers, and it’s free! Select the “Replicator Dual” device from the settings menu if you are using the Flashforge Creator Pro.
Good luck!
Best Regards,
Matt
