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Extruder skipping
Ater many hours of printing i have started having problems with the extruder motor skipping. It cannot extrude at the rates it used to be able to. Last time i printed i had to limit volumetric flowrate to 5mm^3/s and it would still skip. I have tried the following:
1) Tried to swap the stepper driver to one from another motor.
2) Tried to use another socked with same and swapped driver
3) Replaced the extruder and stepper motor. (I had an LGX lite and am now using an orbiter 2.0)
4) Made sure that the config uses the 0.85A that the manual for the Orbiter specifies.
5) Replaced all cables from the board to the extruder
6) Reflashed firmware and reinstalled RatOS on a different Pi
I know its not clogged nozzle either, i can remove the nozzle entirely and still have it skip. I can hold back the filament with relative ease and it becomes easier the longer it tries to extrude.
I'm wondering if its the mainboard or the power supply....when i measure the power into the board from the PSU its all 24V. I'm at the end of my rope. Please help
1) Tried to swap the stepper driver to one from another motor.
2) Tried to use another socked with same and swapped driver
3) Replaced the extruder and stepper motor. (I had an LGX lite and am now using an orbiter 2.0)
4) Made sure that the config uses the 0.85A that the manual for the Orbiter specifies.
5) Replaced all cables from the board to the extruder
6) Reflashed firmware and reinstalled RatOS on a different Pi
I know its not clogged nozzle either, i can remove the nozzle entirely and still have it skip. I can hold back the filament with relative ease and it becomes easier the longer it tries to extrude.
I'm wondering if its the mainboard or the power supply....when i measure the power into the board from the PSU its all 24V. I'm at the end of my rope. Please help
Solution
I think I've figured it out. Took apart the hot end and tried to remove all the plastic in it. When i heated it up to remove the plastic i found that i could not get the blunt end of a 1.9mm drill into the tube that goes between the hot end and the heat brake. Something had hardened at gotten stuck in the tube. After using the sharp end of the drill and manually clearing out the worst of it, it can now extrude PLA at a rate of 25mm^3/s using a temp of 210C. So it seems that it was clogged in the tube and not the nozzle thanks to all who gave me advice 
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