My extruder gears are squeeking during extrusion
Not sure why exactly. It sounds like they are squeeking against plastic, so I suppose they might be squeeking against the filament. FWIW, the print speed is set in the slicer at 300mm/sec (I'm using a volcano), so I'm not sure whether that has anything to do with it or not.
Anyone else encountered this?
Re: My extruder gears are squeeking during extrusion
Not sure why exactly. It sounds like they are squeeking against plastic, so I suppose they might be squeeking against the filament. FWIW, the print speed is set in the slicer at 300mm/sec (I'm using a volcano), so I'm not sure whether that has anything to do with it or not.
Anyone else encountered this?
I saw your post with volcano print, so i guess you using 0.89mm extrusion and 0.3mm layers?
If so is more than normal, your extruder is skiping because you are far higher than the volcano limit
300 * 0.3 * 0.89 = 80.1mm^3/s
So you are tring to push 80mm^3/s when the limit is +/-40mm^3/s on volcano (2x more!), as filament cant go through the nozzle at that speed, the noise you hear is the dents from gears eating the plastic and skiping.
Use 150mm/s max at that config and your extruder will be more happy.
Note if you use 150mm/s you will have to increase temperature to ensure plastic melt, if you go a little down like 30mm^3/s you don't need to increase temperatures.
If you use 0.6mm layer height the max speed you can use is 75mm/s for a reference. So always do the math: speed * layer height * extrusion width must be less than 40mm^3/s
Re: My extruder gears are squeeking during extrusion
So far, through experimentation, I've found that setting the "max volumetric speed" under filament settings in slic3r, it will override all other print settings, apparently with a single speed, which does not work very well, because the infill speed needs to be different than the perimeter speed.
So, if I don't use that, I next need to find what controls the filament speed.
Re: My extruder gears are squeeking during extrusion
So far, through experimentation, I've found that setting the "max volumetric speed" under filament settings in slic3r, it will override all other print settings, apparently with a single speed, which does not work very well, because the infill speed needs to be different than the perimeter speed.
So, if I don't use that, I next need to find what controls the filament speed.
Don't use auto speed, always go manual.
Check filament -> Advanced
Re: My extruder gears are squeeking during extrusion
So far, through experimentation, I've found that setting the "max volumetric speed" under filament settings in slic3r, it will override all other print settings, apparently with a single speed, which does not work very well, because the infill speed needs to be different than the perimeter speed.
So, if I don't use that, I next need to find what controls the filament speed.
Don't use auto speed, always go manual.
Check filament -> Advanced
I don't see anything there:
Re: My extruder gears are squeeking during extrusion
I seem to have already hit a wall with slic3r, so I just now downloaded simplify3d and will be trying that....
Re: My extruder gears are squeeking during extrusion
As near as I can tell from looking at simplify3d, the speed of the filament in the extruder is an imputed value, determined by the program as a function of layer height, layer width, and target print speed. It doesn't seem to be broken out as a separate value. I presume the same is true for the current version of slic3r, which is why I don't see it listed as a separate value.
Apparently, it's incumbent upon the user to not set a faster speed than can be extruded, given the width and height.
Re: My extruder gears are squeeking during extrusion
I had a strange squeaky noise that I traced to the extruder, especially prevalent when retracting. I discovered that the extruder motor gear was not aligned with the filament. Grub screw was tight, so I apparently forgot to check alignment when building. Once aligned, the squeak went away.
Re: My extruder gears are squeeking during extrusion
Not sure what you are tring to achieve, but as told before there are many limits: Software, firmware, hardware and material. You must ensure a good ecosystem and probably you need to override the firmware (recompile)
Re: My extruder gears are squeeking during extrusion
In retrospect, maybe I should have gotten the 40w heater cartridge instead of the 30w one. I set a target temperature of 210C for PLA, but during the fast extrusion, the thermistor reports that only 199C can be sustained. Of course, if I slow the extrusion rate down enough, the temperature is then able to catch up.
I re-ran PID autotune, thinking that might be the probem, but the same results.
Re: My extruder gears are squeeking during extrusion
In retrospect, maybe I should have gotten the 40w heater cartridge instead of the 30w one. I set a target temperature of 210C for PLA, but during the fast extrusion, the thermistor reports that only 199C can be sustained. Of course, if I slow the extrusion rate down enough, the temperature is then able to catch up.
I re-ran PID autotune, thinking that might be the probem, but the same results.
Easy, increase temperature by 10ºc, so print at 220ºc or even 225ºc.
Also use a sock if you not already
Re: My extruder gears are squeeking during extrusion
In retrospect, maybe I should have gotten the 40w heater cartridge instead of the 30w one. I set a target temperature of 210C for PLA, but during the fast extrusion, the thermistor reports that only 199C can be sustained. Of course, if I slow the extrusion rate down enough, the temperature is then able to catch up.
I re-ran PID autotune, thinking that might be the probem, but the same results.
Easy, increase temperature by 10ºc, so print at 220ºc or even 225ºc.
Also use a sock if you not already
I did try setting it at 220C, but I twice got firmware alarms of a "thermal runaway" condition, which shut down the print both times. Go figure.
I'll try the sock.
Re: My extruder gears are squeeking during extrusion
In retrospect, maybe I should have gotten the 40w heater cartridge instead of the 30w one. I set a target temperature of 210C for PLA, but during the fast extrusion, the thermistor reports that only 199C can be sustained. Of course, if I slow the extrusion rate down enough, the temperature is then able to catch up.
I re-ran PID autotune, thinking that might be the probem, but the same results.
Easy, increase temperature by 10ºc, so print at 220ºc or even 225ºc.
Also use a sock if you not already
I did try setting it at 220C, but I twice got firmware alarms of a "thermal runaway" condition, which shut down the print both times. Go figure.
I'll try the sock.
You can set a more agressive temp compensation at firmware and a higher limit for thermal runaway