Prusa yellow pla + prusa mk3 + 0.25mm nozzle = extruding issue  

Re: Prusa yellow pla + prusa mk3 + 0.25mm nozzle = extruding issue

What slicer are you using?

The first thing I'd try is dialing back the speed to 50% using the front dial mid-print. If that fixes the problem, increase it to where it starts again and adjust your print speeds. In general, slow things down. Once you get it printing consistently, you can experiment with upping speeds and temps to find the right balance. Infill patterns also vary in how thick they lay down at various speeds. You could try another pattern if it's always clicking on fast infill.

Re: Prusa yellow pla + prusa mk3 + 0.25mm nozzle = extruding issue

I'm having the same issue, prusa yellow + 0.25mm nozzle. But yellow PLA (any brand) has always had issues printing (any printer) for me, it's always slightly different from other colours that I have a 'yellow' preset in slic3r that's just a bit hotter and slower than the usual pla preset.

Re: Prusa yellow pla + prusa mk3 + 0.25mm nozzle = extruding issue

The clicking is often the result of the extruder feeding filament in faster than it can be melted and pushed through the hotend. This causes the filament to slow or stick in the extruder mechanism, and the gears slip with a clicking noise. At least, that's my understanding and it matches my observations.

If you guys are willing to try something, I seem to have eliminated almost all extruder kicks using Slic3r. Test this yourselves to see if it helps.

1. Create a new Print Settings profile by opening up an existing one and saving it with a new name. This is the profile we'll experiment with.
2. Change Print Settings->Speed->Max volumetric speed to 11.5. This sets an upper speed limit on how much filament gets shoved through using the combination of nozzle size, speed, line width, layer height, acceleration (and probably more) that you specify. It acts as an overall system braking limit. 11.5 is the value for the E3D V6 as stated by E3D that I was able to find. This can likely be tweaked, but use this for now. This alone might take care of most of the feed issues.
3. If you have a particular filament that is still jamming, select a similar filament profile under Filament settings and save it with a new name (e.g. Prusa Yellow). Change Filament Settings->Advanced->Max volumetric speed for that filament to a lower value. If it's a PLA filament, that value is probably 15 now. Notice that this is higher than the 11.5 (or so) the E3D V6 is capable of handling, which likely explains why some filaments run up against this limit and cause clicking. You'll notice that other filament profiles use values from 1 to 10. If you set the print setting profile to 11.5 in the step above, the throughput should be limited. If still you run into a problematic filament, try setting it to below 11.5 (e.g. 8). I always crank this setting way back on filled or flexible filaments.

Try a print and see if you still have the clicks. If not, you can try adjusting the filament value in step 3 upwards until it starts clicking again, then back off. If you have a need for speed, you could also try slowly upping the print settings value upwards from 11.5 until you figure out your printer's limits. The preview in Slic3r is really good for observing the effects these settings have on gcode generation. Export the generated gcode, then play around with the view options.

This way, you'll be able to simply select that filament profile without having to make other printer adjustments.