So I've been working on my Rostock since July and it hasn't yet worked 100%, I have been dealing with the bowden extrusion system since August and its sort of driving me crazy.
Here is what I have been doing:
- original configuration: greg/wades extruder (hearingbone gears) with a bowden clamp using zipties. This didn't end up working as the bowden tube kept popping out during prints.
- 2nd configurations: greg/wades extruder (hearingbone gears) with bowden clamps using both zipties and M4 nuts. This fixed all the problems with the tube popping out of place. The problem with this set up was that the plastic extruded was not enough and the layers were thing and crunchy, not attaching well to eachother at all. I then conducted research and found out my NEMA17 stepper for the extruder did not have enough torque for consistent extruder
Fast forward to now, new configuration:
- Greg/wades extruder (hearingbone gears) with bowden clamps using zipties and M4 nuts, now with a 76 OZ-in NEMA17 stepper. I am still getting the same problems as before. It seems that the two M4 nuts on the extruder end and the hotend end together create enough friction to cause the filament to jam for a short period which leads to the hobbed bolt grinding the filament, when the filament is grinded like this it pushed backward until the hobbebolt locks on to it again.
76 OZ-in should be enough to crank through (especially at 215C for PLA) I am having trouble figuring out what to do.
Here is my setup:
- Printrboard Rev B Marlin 1.0
- Makergear hotend with 0.35mm nozzle
- 2mm ID / 4mm OD PTFE tube for the bowden tube.
- The tube is mounted using clamps that hold M4 nut threaded around the tube with zipties for insurance. The bowden tube on the extruder side has the nut threaded a ways down such that the bowden tube is right up to the hobbed bolt, on the hotend side the clamp mounts the tube such that it is right on top of the hole. Could the fact that my bowden tube is threaded so far down on the extruder side be causing the problems?
- Extruding 1.75mm PLA from Ultimachine
Here is what I have been doing:
- original configuration: greg/wades extruder (hearingbone gears) with a bowden clamp using zipties. This didn't end up working as the bowden tube kept popping out during prints.
- 2nd configurations: greg/wades extruder (hearingbone gears) with bowden clamps using both zipties and M4 nuts. This fixed all the problems with the tube popping out of place. The problem with this set up was that the plastic extruded was not enough and the layers were thing and crunchy, not attaching well to eachother at all. I then conducted research and found out my NEMA17 stepper for the extruder did not have enough torque for consistent extruder
Fast forward to now, new configuration:
- Greg/wades extruder (hearingbone gears) with bowden clamps using zipties and M4 nuts, now with a 76 OZ-in NEMA17 stepper. I am still getting the same problems as before. It seems that the two M4 nuts on the extruder end and the hotend end together create enough friction to cause the filament to jam for a short period which leads to the hobbed bolt grinding the filament, when the filament is grinded like this it pushed backward until the hobbebolt locks on to it again.
76 OZ-in should be enough to crank through (especially at 215C for PLA) I am having trouble figuring out what to do.
Here is my setup:
- Printrboard Rev B Marlin 1.0
- Makergear hotend with 0.35mm nozzle
- 2mm ID / 4mm OD PTFE tube for the bowden tube.
- The tube is mounted using clamps that hold M4 nut threaded around the tube with zipties for insurance. The bowden tube on the extruder side has the nut threaded a ways down such that the bowden tube is right up to the hobbed bolt, on the hotend side the clamp mounts the tube such that it is right on top of the hole. Could the fact that my bowden tube is threaded so far down on the extruder side be causing the problems?
- Extruding 1.75mm PLA from Ultimachine