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Hello, we have some problems with our FFCP.
It seems like there is no consistent extrusion at the layer start or after travel moves.
Here are some pictures:
https://drive.google.com/file/d/0B_j...ew?usp=sharing
https://drive.google.com/file/d/0B_j...ew?usp=sharing
https://drive.google.com/file/d/0B_j...ew?usp=sharing
As you can see, there are some layers that start ok and some that don't.
Any ideas what could be causing this?
it's a very small area - could have been an inconsistency in the filament maybe.
It is happening with every filament and almost every print.
Hi
Are you trying to print a completely solid wall? It's not real clear what the print really is ....If you are, that is a very difficult task for a slicer / printer.
Bob
No, it's not the slicer. The problem is that after travel moves there is no extrusion for a few moments. Not all the prints have this problem, but when I print multiple objects on the same plate this happens.
Hi
Let's back up a bit:
The slicer generates the gcode. The code is sent to the printer. The firmware executes the gcode.
If something is not happening then:
1) The gcode told it to do what it is doing.
2) The gcode did not get sent to the printer.
3) The firmware is not executing the gcode.
If the extruder motor is not moving when it should, then it's got to be one of the above. If the extruder *is* moving and noting is coming out, that's a bum extruder.
Bob
The cause is almost sure mechanical. We will probably need to change some parts in the near future. We made a detour and set the layer start points at random points to minimize the effect. In the photos the start point is at the same point each layer.
Hi
Ok, so:
What kind of printer is it?
What kind of extruder is it?
What hot end is it?
What filament are you using?
What temperatures are you running?
What extrusion speeds are you set to?
Is the extruder motor moving or not?
If not:
What kind of stepper drivers are you running ? ......
Lots of possibilities and very little information to go on.
Bob
I mentioned in the first post that it's a Flash Forge Creator Pro, 2015 model. It has printed almost 1000 meters and I guess that it needs some service.
I didn't write a lot of information because we tested all possible settings in Simplify3D. We also have custom PID and JKN values.
Was hoping that someone else with FFCP had printed something similar (hollow cylinder) with same point for layer change and was curious if this effect appeared.
Hi
Since you already have the problem solved ( = you know you have a broken extruder and need to strip it down), it might have been useful to present that fact earlier.
Bob
Thank you for the interest, we compromised to resolve the problem, but it's not the best solution. I presume it's mechanical because we tested a lot. We will make that model again, and will post the printing settings tomorrow.Quote:
Originally Posted by uncle_bob
Hi, If I may continue the thread for a bit, I have a similar problem in that I am getting NO extrusion from certain files. I can print any of the sample files provided with the printer but keep having issues with downloaded files from other sites. I can load filaments with no problems, the platform and nozzles heat up without any issues and the nozzles wipe before commencing the print run but then zilch! I am using Simplify 3D to create the codes, but can't see any issues with the set ups at all, just zero extrusion. The machine is fairly new, only a dozen prints so far but any suggestions would be gratefully received.
David
sounds like you're using the wrong s3d template.
What machine do you have and what template are you using ?
And where are you getting the models that don't print ?
It's a Flashforge Creator Pro dual-head and using the default settings for the machine. Only using the right hand extruder and standard settings for ABS. The models are usually from Thingyverse, a crescent wrench and a whistle etc, just some things that I can use to illustrate the process of 3D printing.
Ah yes, the simplify 3d profiles are not that great.
Try using the generic replicator dual profile. I've found it's a lot more reliable than anything that actually says 'flashforge'.
I've had the same issue with the flashforge profiles, it all looks great but the printhead just stops on the dge of the paltform and nothing happens. Since switching to the generic replicator dual profiles, never had a problem.
And the pro differences are all mechanical, nothing that's effected by the simpler profile.
Thanks for that - I'll sit down this evening and give it a whirl. I'll post any results on the thread. Regards
Also in S3D, for instance when you are set for ABS and right extruder. Got to the advanced and make sure everything there is also saying "right" extruder. I have had it where part was on right to print with but heating and a couple others were on left so it heated the left and tried to print but it thought it was supposed to use the right to print and nothing happened. Not sure how it happened (probably me) but one corrected it was fine.
I am using the Flashforge Creator Pro profile on my 2016 model and it is ok except I do not like how it does its purge before print.
Trying the Replicator dual profile is a good idea.
Yep - I checked all that about the right extruder and all seems in order. I have gone back to Replicator for the moment until I can install a new graphics card and use OpenGL instead of the standard HP graphics drivers. Both S3D and Flashprint seem to require those, in fact Flashprint won't even run because it can't find OpenGL!