My printer does an excellent job of printing smaller parts around 1 to 2 inches in diameter. However, it will not reliably print larger parts, say 5 inches in diameter. I did not have that problem initially. However, i can't seem to print anything of any size. Sometimes the extrruder motor stutters, then stops extruding unitl I reboot by turning off and then re-initializing the printer. Other times, the printer will print the raft and several layers of the part then just stops extruding until I reboot. I have eliminated possible binding in the Bowden tube, by feeding the filament directly from the spool. I have also tried changing the Z offset and temperature with no obvious improvement.
Has anyone else had similar problem and did you find a solution?
Have you tried to calibrate the printer? I had the issue for big parts, on the edge it would be a problem. Now it's ok.
(I think everyone should do it actually, but it's not that easy, I did the paper thing, it was not really reliable, I had to calibrate, test and calibrate again)
[quote][size=2][color=#999999]Arvi89 post at 2017-2-16 01:56[/color][/size]
Have you tried to calibrate the printer? I had the issue for big parts, on the edge it would be a pr …[/quote]
Yes, I have recalibrated several times. I have also played with the Nozzle Offset. It seems that the problem only occurs for large Y values.
I did an experiment printing a small 3/4 inch diameter part at three locations; centered, small Y value, and large Y value. The part printed fine at small and centered, but just stuttered at the larger Y value location.I suppose it could be an intermittent connection in one of the stepper motor wires. Or, It could even be a software or firmware problem.
I will continue to experiment.
[quote][size=2][color=#999999]JerryOBradley post at 2017-2-16 02:42[/color][/size]
Yes, I have recalibrated several times. I have also played with the Nozzle Offset. It seems t …[/quote]
I found the problem. The 16 wire cable that goes to the extruder had some broken wires. They were making contact at low Y values but opening up and shutting off power to the extruder motor at higher Y values. Submitted email to Cetus3D Support and awaiting a replacement cable.
Just for future reference the Cetus is a direct not a Bowden tube printer. The tube you referenced is just a guide and has really no effect on filament feed other than to direct the path. On a Bowden tube printer the extruded would be at one end of the tube and the nozzle at the other