More Ender 3 troubles, and as usual it is the damn extruder again. I went to print some brackets (2nd print on this printer of a non-test item) and it failed miserably. I could see that it was going to have problems since the extruder was slipping so I tried adjusting the tension on the extruder up and down. There was no happy medium, if it didn't slip, it was popping. This is after flashing the firmware with Marlin 2.0 and then TH3D, adjusting the vref of the extruder (now at 0.815v which seems too hot for it but with it lower it was lacking the torque needed). I have also printed a different extruder with an adjustable spring tension (which is backed all the way off now since the stepper is unable to keep up), and swapped the extruder gear with something more aggressive (36 tooth). The extruder was re-calibrated after the mods, and was about 14mm off which is quite a bit - though I accounted for that in the firmware and when I re-checked it was about spot on. I am going to measure the stepper however I doubt it is faulty.
Compounding things, the Kossel is back to it's old tricks also with bad level shifts so I cannot rely on that either. I think I need to swap the extruder on the Ender 3 with a Titan since the stock stepper lacks the torque to push the filament, but damn if I don't also need to swap the hot end too since it is garbage to begin with, and I suspect part of the trouble with the under extrusion due to the design of the Boden setup and the hot end. I have been unable to get the stock hot end adjusted tightly enough to say put, so it ends up leaking which leads into more problems. It's been weeks since I have been able to get a decent print for an actual project out of my printers so I need to start solving some of these problems, and that cannot be done in this case with the stock parts I think.
I have the parts to do these upgrades on the Ender 3, but lack a reliable printer to make the mounts for them. So looks like I need to go back and give the Kossel some attention and a brain transplant to get it back in operation reliably * so I can then get the POS Ender 3 upgraded to the point of usability. Amazing that I Ender'ed up with two lemons, but now I have to double down on making some damn lemonade...
* I may have lucked out though, I'm trying to print a simple mount for the new hot end on the Kossel. It is a quick print so hopefully it can do it without shifting layers.
After attempting to run a print with the new hot end, I found that the stock Ender 3 temp probe which I moved over to the new hot end was not working accurately and seemed to be reading low, it was probably the source of much of the problems. I swapped it with he probe from the new hot end and found temps were much closer to reality now. Hopefully I am getting closer to a functional printer.
Compounding things, the Kossel is back to it's old tricks also with bad level shifts so I cannot rely on that either. I think I need to swap the extruder on the Ender 3 with a Titan since the stock stepper lacks the torque to push the filament, but damn if I don't also need to swap the hot end too since it is garbage to begin with, and I suspect part of the trouble with the under extrusion due to the design of the Boden setup and the hot end. I have been unable to get the stock hot end adjusted tightly enough to say put, so it ends up leaking which leads into more problems. It's been weeks since I have been able to get a decent print for an actual project out of my printers so I need to start solving some of these problems, and that cannot be done in this case with the stock parts I think.
I have the parts to do these upgrades on the Ender 3, but lack a reliable printer to make the mounts for them. So looks like I need to go back and give the Kossel some attention and a brain transplant to get it back in operation reliably * so I can then get the POS Ender 3 upgraded to the point of usability. Amazing that I Ender'ed up with two lemons, but now I have to double down on making some damn lemonade...
* I may have lucked out though, I'm trying to print a simple mount for the new hot end on the Kossel. It is a quick print so hopefully it can do it without shifting layers.
After attempting to run a print with the new hot end, I found that the stock Ender 3 temp probe which I moved over to the new hot end was not working accurately and seemed to be reading low, it was probably the source of much of the problems. I swapped it with he probe from the new hot end and found temps were much closer to reality now. Hopefully I am getting closer to a functional printer.
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