Has anyone seen this happen to the extruder Stepper motor before? I am running 100mm of PLA through the nozzle for calibration when I took this video.
https://youtu.be/hqTWKGdONog
To me that appears to be caused by the filament clogging slightly which causes the extruder to make that noise. I would do a cold pull on the filament to clear as much as you can out of the nozzle.
i did see that once when the tension on the idler of the extruder was too high and it could not extrude at the speed i was trying to. try to dial it back a notch - both the tension and the speed and see if it works better.
if you extrude over the limit either your filament will grind away or the stepper is loosing… (or the gear will loosen) - so i would say that is the best option… but i had this only when temp was too low, nozzle clogged or one time when my printer pulled itself through the room as the fillament was tangled on the spool.
The extruder is skipping steps because it doesn’t have enough torque to push the filament, usually because some external factor is causing resistance. Is it just feeding through the bowden tube or is it going into the hotend?
@Adam_Steinmark it is Bowden tube style
Sorry I should have been more clear. I see that, what I was asking is the bowden tube attached to anything.
Do you thing that switching extruder stepper drivers to slow decay is good idea? If there is skipping.
@Jukka-Pekka_Ylitalo if the driver is deteriorating don’t swap it with another driver on the board, drivers are pretty cheap so just replace it.
@Adam_Steinmark my Stepper drivers are good. I just mean should i change my driver to use slow decay mode on extruders. To get more Torque to push Filament trough my hot end.
@Adam_Steinmark Oh, my mistake, It is going to an E3D V5 clone. and yes it is attached to the hotend at the time the video was taken. I have only had about 1K of filament printed through it. But I suppose that really doesn’t make a real difference.
Two things from experience.
Poor calibration pololus.
Flow exceeded, dropped by 20% and climbed slowly. You have e3d.
Try again but disconnect the bowden tube from the hotend so it just pushes out the other end of the bowden tube and see if you get the same result. If so, it’s likely a problem with the motor or driver.
Oh and like @jose_luis_martin if you using drivers that didn’t come pre-installed on your board, you’ll definitely have to tune the current.
@Brad_Barrone I should also add that I am using a .4 nozzle and I was extruding at 185C at the time.
Check the force of the motor with fingers, you have to make force to stop it, if it is on the contrary low intensity. Another experience was in prusa i2 the pololu with much temperature, with ventilation to solve it.
@Brad_Barrone Very low temperature, possible hotend jam with speed.
I’d agree with @jose_luis_martin . Check to make sure you can push the filament through the hotend with a moderate force. If you’re using a lot of force or it won’t feed you’re printing at too low temperature.
@Adam_Steinmark I will try these tests later on today. I will be sure to report my findings. Thanks for your insights and opinions, they help very much.
185C is a bit on the low side for PLA. Depending on the brand you may need to increase the temperature.