Hello.
I apologize if this question has already been answered, but I couldn’t find it. The problem is this:
my Creality Hi Combo printer doesn’t feed filament when printing with CFS. CFS loads filament when commanded. However, when I issue a command, either in manual mode or while printing, CFS doesn’t feed filament into the print head. The flag on the filament buffer moves down and stays there, preventing CFS from feeding filament. The extruder tries to draw filament, but since there’s no filament feeding, it slips.
Replacing the buffer with a new one didn’t help.
Updating the firmware also didn’t help.
I only use Creality filament.
Printing without CFS works without problems.
Has anyone encountered this issue? Can anyone advise me on how to fix it?
Hi! Does the printer show any error code or other info when the issue occurs? You can check if there are solution on Creality Wiki - Creality Hi & Creality Hi Combo 3D Printer User Guide | Creality Wiki. Maybe this will help. Check if the PTFE tubes are connected properly with the buffer.
Best regards!
Hi. The PTFE tubes are connected according to the instructions. The printer doesn’t display any errors, and everything seems to be printing fine. However, the filament isn’t being fed by the buffer, causing the feed gears in the print head to slip.
I couldn’t find any similar issues on the wiki, so I asked for help here.
Thanks.
if you disconnect the PTFE tube from the hub and send a extrude command, What happen?
Nothing. The print head is trying to retract the filament. But because the CFS isn’t feeding the filament, the gears are slipping.
Basically, if you disconnect the PTFE tube from the filament buffer at the top, the filament doesn’t pull the buffer flag, and it stays in the down position. The CFS feeds filament for a while, then reports a buffer error. If you manually raise the buffer flag, the CFS stops feeding filament.
If you disconnect the PTFE tube from the buffer at the bottom, the CFS feeds filament indefinitely.