While experimenting, I found that slowing down your solid infill settings a bit really helps...if this is your case. Is this happening on all layers, or just solids? Also, a pic of what you are experiencing would really help.

Pretty basic question, but have you calibrated your extruder recently? Does your filament diameter setting match the filament you are currently feeding?

http://www.reddit.com/r/3Dprinting/comm … d_volcano/

But that's with PLA. Still hard to believe.

mdrVB6 wrote:

guy over on reddit who was printing 0.90 layers at 25 mm/s with the 1.2 nozzle.

That'd be 31.5mm^3/sec, assuming 1.4mm widths. Was he printing the same material as you?

The general limit on a v6 is about 15 mm^3/sec. I get occasionally missed steps when I push towards 20. I think 35-40mm^3/sec would be a good limit for Volcano, since the melt zone is roughly doubled.

As a bump, I finally had a chance to get a Volcano set up. With a stock SD3 + Lawsy extruder, best I can do is 85mm/sec, 0.8mm nozzle, 0.5mm layers, MG94 ABS at 250C.

That's 35mm^3/sec, or about 2 grams a minute - not counting acceleration/deceleration phases and travel moves. Actual average is about 1.2g/min, or a 50 gram object in 42 minutes.

CF, you seem to be misunderstanding some fundamentals here. Its not all about feed rate, that's only one part of the equation.

true print speed = feedrate * layer height * layer width

jhead = 100mm/sec * .3mm * .4mm = 12mm^3/sec
volcano = 25mm/sec * 1.2mm * .9mm = 27mm^3/sec

Therefore Volcano is more than twice the speed of your j-head. Not to mention 1.75mm prints faster than 3mm when it comes to Volcano, as confirmed by E3D.

You're right, I should have relate it to the volume of plastic. I remember reading somewhere about this calculation but it included the fact that the sides of the layer are round  so more like (_)  Have trouble finding it again.

true print speed = feedrate * layer height * layer width

jhead = 100mm/sec * .3mm * .4mm = 12mm^3/sec
volcano = 25mm/sec * 1.2mm * .9mm = 27mm^3/sec

Therefore Volcano is more than twice the speed of your j-head. Not to mention 1.75mm prints faster than 3mm when it comes to Volcano, as confirmed by E3D.

I use the same speed for infill and perimeters to get a tolerably print and for the top use the 30% speed setting.

1.2mm nozzle, 0.8 & 0.9 layer

How adventurous are you feeling?  Want to try something some settings that push 60- 80 mm^3/s and see if you can pull it off?

PS: where is your fan on that E3D heatsink?

I realize that I am not near the volume you are pushing.  That was the very first thing I printed just to dial in my infill settings.
You know me I am willing to try anything once I have had a very rushed schedule lately and most of my (printer) time has been dedicated to the cyclops.  I just needed one of my printers up and running so I quick tossed the volcano on my #2 printer.  Tomorrow it will spend the day printing to get caught up.
As far as my fan goes???? The bulldogXL's have a fan mounted horizontally under the motor that blows through the mount forward and onto the E3d.  If anyone else is using this setup it is important to remove the E3d fan or run it backwards.  Otherwise the two fans push against each other and stall the moving air.  The result is inadequate cooling and is something Adrian and I tested a little over a year ago.