Voron 2.4 Clockwork 2 + E3D Revo extrusion problem

[arthurlv]

Hi,

I have completed my Voron 2.4 but I'm struggling with an extrusion issue. Every time I try to print something, it works fine at the beginning but eventually it clogs and stops extruding or at least with minimal output. I can also hear the extruder clicking and skipping. Once I remove the filament mid print, clip the filament and put it back in the extruder, it seems to back to normal for a while.

I'm using an E3D Revo with a 0.4mm nozzle and I built a stealthburner with a Clockwork 2 extruder. To be totally honest I'm not sure to understand how the clockwork works exactly and what the thumbscrew pressure adjustment is supposed to do. Obviously I've tested numerous positions but it doesn't seem to be doing much.

I've also uploaded 2 videos. The first one printing a 40 min 3D Benchy and the second one where I extrude filament at 5mm/s to clearly demonstrated the extruder clicking hopelessly. I've added the settings for the extruder as well.

Thanks a lot for your help guys !!

Arthur

---

[extruder]
step_pin: PE2
dir_pin: PE3
enable_pin: !PD4
## Update value below when you perform extruder calibration
## If you ask for 100mm of filament, but in reality it is 98mm:
## rotation_distance = <previous_rotation_distance> * <actual_extrude_distance> / 100
## 22.6789511 is a good starting point
rotation_distance: 22.6789511 #Bondtech 5mm Drive Gears
## Update Gear Ratio depending on your Extruder Type
## Use 50:17 for Afterburner/Clockwork (BMG Gear Ratio)
## Use 80:20 for M4, M3.1
gear_ratio: 50:10 #BMG Gear Ratio
microsteps: 16
full_steps_per_rotation: 200 #200 for 1.8 degree, 400 for 0.9 degree
nozzle_diameter: 0.400
filament_diameter: 1.75
heater_pin: PA2
## Validate the following thermistor type to make sure it is correct
sensor_type: Generic 3950 ##ATC Semitec 104NT-4-R025H42G
## "EPCOS 100K B57560G104F"
## "ATC Semitec 104GT-2"
## "NTC 100K beta 3950"
## "Honeywell 100K 135-104LAG-J01"
## "NTC 100K MGB18-104F39050L32" (Keenovo Heater Pad)
## "AD595"
## "PT100 INA826"
sensor_pin: PF4
min_temp: 10
max_temp: 270
max_power: 1.0
min_extrude_temp: 170
#control = pid
#pid_kp = 26.213
#pid_ki = 1.304
#pid_kd = 131.721
## Try to keep pressure_advance below 1.0
pressure_advance: 0.05

## Default is 0.040, leave stock
pressure_advance_smooth_time: 0.040

 

[spriggsy]

Hi,

I have completed my Voron 2.4 but I'm struggling with an extrusion issue. Every time I try to print something, it works fine at the beginning but eventually it clogs and stops extruding or at least with minimal output. I can also hear the extruder clicking and skipping. Once I remove the filament mid print, clip the filament and put it back in the extruder, it seems to back to normal for a while.

I'm using an E3D Revo with a 0.4mm nozzle and I built a stealthburner with a Clockwork 2 extruder. To be totally honest I'm not sure to understand how the clockwork works exactly and what the thumbscrew pressure adjustment is supposed to do. Obviously I've tested numerous positions but it doesn't seem to be doing much.

I've also uploaded 2 videos. The first one printing a 40 min 3D Benchy and the second one where I extrude filament at 5mm/s to clearly demonstrated the extruder clicking hopelessly. I've added the settings for the extruder as well.

Thanks a lot for your help guys !!

Arthur

---

[extruder]
step_pin: PE2
dir_pin: PE3
enable_pin: !PD4
## Update value below when you perform extruder calibration
## If you ask for 100mm of filament, but in reality it is 98mm:
## rotation_distance = <previous_rotation_distance> * <actual_extrude_distance> / 100
## 22.6789511 is a good starting point
rotation_distance: 22.6789511 #Bondtech 5mm Drive Gears
## Update Gear Ratio depending on your Extruder Type
## Use 50:17 for Afterburner/Clockwork (BMG Gear Ratio)
## Use 80:20 for M4, M3.1
gear_ratio: 50:10 #BMG Gear Ratio
microsteps: 16
full_steps_per_rotation: 200 #200 for 1.8 degree, 400 for 0.9 degree
nozzle_diameter: 0.400
filament_diameter: 1.75
heater_pin: PA2
## Validate the following thermistor type to make sure it is correct
sensor_type: Generic 3950 ##ATC Semitec 104NT-4-R025H42G
## "EPCOS 100K B57560G104F"
## "ATC Semitec 104GT-2"
## "NTC 100K beta 3950"
## "Honeywell 100K 135-104LAG-J01"
## "NTC 100K MGB18-104F39050L32" (Keenovo Heater Pad)
## "AD595"
## "PT100 INA826"
sensor_pin: PF4
min_temp: 10
max_temp: 270
max_power: 1.0
min_extrude_temp: 170
#control = pid
#pid_kp = 26.213
#pid_ki = 1.304
#pid_kd = 131.721
## Try to keep pressure_advance below 1.0
pressure_advance: 0.05

## Default is 0.040, leave stock
pressure_advance_smooth_time: 0.040

Hi there - did you end up working this out?

I have a similar issue with CW2 so would be keen to understand anything you learnt.

I presume you have had a good look at this: https://ellis3dp.com/Print-Tuning-Guide/articles/troubleshooting/extruder_skipping.html

Cheers

 

[55mdmoy]

If extruder starts clicking, during the middle of the print, then I wonder if you have either a temperature drop which is clogging the print nozzle
or something else that is preventing filament from feeding smoothly. Could also be a potential problem back at the filament spool where the filament
is jammed on the spool (sometimes happens with loosely wound filament or filament that has so much slack that loops of filament on the spool tangle
with each other, so that filament won't feed to the extruder, and it just grinds-in-place. I had this problem when I had a filament-spool holder that was
a bit too "frictionless", so that I tug on the filament from the printer/extruder would cause a lot of filament to unwind, which then caught up on itself
on the spool.

So, either way, the filament either isn't getting through the toolhead/nozzle fast enough or filament is not getting to the extruder fast enough....

M

p.s. have kit-built Prusa Mini+ and Voron 2.4r rev C with bondtech extruder, Revo head, CW2/Stealthburner, Tap, and SFS2 filament sensor....

 

[Maddog]

Hi,

I have completed my Voron 2.4 but I'm struggling with an extrusion issue. Every time I try to print something, it works fine at the beginning but eventually it clogs and stops extruding or at least with minimal output. I can also hear the extruder clicking and skipping. Once I remove the filament mid print, clip the filament and put it back in the extruder, it seems to back to normal for a while.

I'm using an E3D Revo with a 0.4mm nozzle and I built a stealthburner with a Clockwork 2 extruder. To be totally honest I'm not sure to understand how the clockwork works exactly and what the thumbscrew pressure adjustment is supposed to do. Obviously I've tested numerous positions but it doesn't seem to be doing much.

I've also uploaded 2 videos. The first one printing a 40 min 3D Benchy and the second one where I extrude filament at 5mm/s to clearly demonstrated the extruder clicking hopelessly. I've added the settings for the extruder as well.

Thanks a lot for your help guys !!

Arthur

---

[extruder]
step_pin: PE2
dir_pin: PE3
enable_pin: !PD4
## Update value below when you perform extruder calibration
## If you ask for 100mm of filament, but in reality it is 98mm:
## rotation_distance = <previous_rotation_distance> * <actual_extrude_distance> / 100
## 22.6789511 is a good starting point
rotation_distance: 22.6789511 #Bondtech 5mm Drive Gears
## Update Gear Ratio depending on your Extruder Type
## Use 50:17 for Afterburner/Clockwork (BMG Gear Ratio)
## Use 80:20 for M4, M3.1
gear_ratio: 50:10 #BMG Gear Ratio
microsteps: 16
full_steps_per_rotation: 200 #200 for 1.8 degree, 400 for 0.9 degree
nozzle_diameter: 0.400
filament_diameter: 1.75
heater_pin: PA2
## Validate the following thermistor type to make sure it is correct
sensor_type: Generic 3950 ##ATC Semitec 104NT-4-R025H42G
## "EPCOS 100K B57560G104F"
## "ATC Semitec 104GT-2"
## "NTC 100K beta 3950"
## "Honeywell 100K 135-104LAG-J01"
## "NTC 100K MGB18-104F39050L32" (Keenovo Heater Pad)
## "AD595"
## "PT100 INA826"
sensor_pin: PF4
min_temp: 10
max_temp: 270
max_power: 1.0
min_extrude_temp: 170
#control = pid
#pid_kp = 26.213
#pid_ki = 1.304
#pid_kd = 131.721
## Try to keep pressure_advance below 1.0
pressure_advance: 0.05

## Default is 0.040, leave stock
pressure_advance_smooth_time: 0.040

i have the same hardware and I had same problem Using non-high flow nozzles. Since you did not indicate your print speed, nozzle type or extruder current I can only guess.
My default extruder current was set for 0.3A. I increased it to 0.4A and it was way better but not perfect. It still clicked on long prints so I had to increase current to 0.6A and it works perfect on most prints Up to about 166mm/sec.
Try increasing the current. I am looking into high flow REVO nozzles and upgrading to Galileo 2 To get past 166mm/sec if possible. Will see which one helps more.

 

[majic79]

Why are you using the generic 3950 thermistor for the Revo extruder? I've been chasing no-end of issues, and as soon as I put the ATC thermistor in and retuned PID, it's improved massively