TheDullCarbide

I originally posted this in the wrong section: I've been having that dreaded clogging while printing Colorfabb PA-CF. I have a 0.4mm hardened nozzle in an E3D V5 head, printing with 0.2mm layers. I found somebody in Reddit who hit the nail on the head. He said that when the extruder retracts, the fibers that were inside the 0.4mm hole stick to the end of the filament as it pulls back. Then when the extruder primes again, those fibers don't always re-align with the 0.4mm hole and sit on top of it sideways, clogging it. Now if this happened with an unfilled filament, that sort-of tail would just remelt in the nozzle. Since the carbon fiber doesn't melt, it just clogs the hole. The guy on Reddit said that the key is to keep the filament moving forward. I tried this by turning off retractions and only using combing (even though Colorfabb says it can handle retractions) and I've done multiple >3h prints now without clogging. Also, being this filament is so hard, it handles very well without retractions and leaves very minimal stringing. I hope this helps you as much as it helped me. Now if only I could afford another spool...

I've been having that dreaded clogging while printing Colorfabb PA-CF. I have a 0.4mm hardened nozzle in an E3D V5 head, printing with 0.2mm layers. I found somebody in Reddit who hit the nail on the head. He said that when the extruder retracts, the fibers that were inside the 0.4mm hole stick to the end of the filament as it pulls back. Then when the extruder primes again, those fibers don't always re-align with the 0.4mm hole and sit on top of it sideways, clogging it. Now if this happened with an unfilled filament, that sort-of tail would just remelt in the nozzle. Since the carbon fiber doesn't melt, it just clogs the hole. The guy on Reddit said that the key is to keep the filament moving forward. I tried this by turning off retractions and only using combing (even though Colorfabb says it can handle retractions) and I've done multiple >3h prints now without clogging. Also, being this filament is so hard, it handles very well without retractions and leaves very minimal stringing. I hope this helps you as much as it helped me. Now if only I could afford another spool... EDIT: Just realized this was posted in the completely wrong section. I reposted it in the materials section now. If an administrator wants to delete this, please do.

I ended up just calculating where the M600 should be and threw it in the Gcode manually because I needed to get my job over with. I also noticed that the Gcode always starts at layer -6, even with rafts of different heights. I did not try it with brim, skirt, or none yet.

I've been using Cura 15.04.6 with my Monoprice Maker Select Mini V2 (uses Marlin flavor) for about a year because I liked the simplicity. I recently downloaded Cura 3.5.0 because I had a project that involved embedding a steel washer in the print and the "Pause" plugin never worked on 15.04.6. Long story short, I figured out that my printer doesn't recognize the M0 or M1 command. It does, however, recognize M600 with no arguments as a pause command. I was able to use the "Change Filament" plugin on 3.5.0 with the filament retraction set to 0 to get the printer to pause, but it would never pause at the correct layer. The Problem: My print needs to pause after layer 40 is printed according to the "Layer View" slider in Cura. When I use the "Change Filament" plugin and input layer 40, the M600 line is inserted immediately BEFORE layer 39. G0 X48.262 Y59.406 ;TIME_ELAPSED:1526.877893 ;LAYER:39 G0 X48.262 Y59.406 Z9 M600 ; Generated by FilamentChange plugin ;TYPE:WALL-INNER G1 F2400 E1197.38525 G1 X48.259 Y59.394 E1197.38566 I would need this instruction immediately BEFORE layer 41. But wait, there's more: My print includes a 4 layer thick raft (base layer, interface layer, and 2 surface layers). I am aware that Cura uses negative layers in the Gcode for raft layers, but my Gcode starts at Layer -6: G92 E0 G1 F2400 E-4.5 ;LAYER_COUNT:64 ;LAYER:-6 M107 G0 F3600 X45.596 Y49.207 Z0.3 ;TYPE:SUPPORT-INTERFACE G1 F2400 E0 G1 F900 X45.825 Y48.995 E0.01557 This would make the first layer of the part Layer -2. Now, it is important to remember that the "Layer View" in Cura calls the base layer of the raft Layer 1, so when I say I need to stop after Layer 40, I'm assuming the base layer of the raft to be Layer 1. So to recap: 1. The "Change Layer" plugin places the M600 line BEFORE the layer that comes BEFORE the one inputted to the Post-Processing dialog. 2. The comments before each layer in the Gcode start at -6, despite a raft that is 4 layers thick. 3. The "Layer View" in Cura says that the base layer of the raft is Layer 1. Attached is the full copy of the Gcode with Layer 40 in "Change Filament" plugin's dialog. Thanks in advance for your help, Tyler MSMV2E3D_Washer Test 2.gcode