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Polygonhell wrote:I'd disconnect the bowden tube (AT THE EXTRUDER not the hotend since on the V6 the bowden tube runs into the body), set the temperature to 250 and try feeding the filament by hand to see what it feels like. It could be clogged, or it could just be under reading temperature by a significant margin. If you have extra PTFE tube lying around, you could cut a short length off it and use that so you don't have to push the filament all the way through the long Tube. At 250C with ABS there will still be significant resistance, but you should be able to feed plastic by hand relatively easilly.

FWIW my V5's and my Kraken, with what I believe is the same thermistor all under read by over 20C when using the recommended thermistor in the firmware, so 220C is really just 200C. I use a custom thermistor in the firmware tuned to give a correct reading at printing temperatures.

If you can;t feed by hand at that temperature, and it's still clogging you'll probably have to disassemble it, it's not heard of for particles to be embedded in the filament, or maybe something left over from the machining of the nozzle.

Also if I put the target temperature at 250 it cant reach it for some reason. It hovers around 247

[youtube]http://www.youtube.com/watch?v=xr02pG58gaU[/youtube]

Polygonhell wrote:I'd disconnect the bowden tube (AT THE EXTRUDER not the hotend since on the V6 the bowden tube runs into the body), set the temperature to 250 and try feeding the filament by hand to see what it feels like. It could be clogged, or it could just be under reading temperature by a significant margin. If you have extra PTFE tube lying around, you could cut a short length off it and use that so you don't have to push the filament all the way through the long Tube. At 250C with ABS there will still be significant resistance, but you should be able to feed plastic by hand relatively easilly.

FWIW my V5's and my Kraken, with what I believe is the same thermistor all under read by over 20C when using the recommended thermistor in the firmware, so 220C is really just 200C. I use a custom thermistor in the firmware tuned to give a correct reading at printing temperatures.

If you can;t feed by hand at that temperature, and it's still clogging you'll probably have to disassemble it, it's not heard of for particles to be embedded in the filament, or maybe something left over from the machining of the nozzle.

So according to the thermocouple my extuder is actually at 127c when it thinks its at 240c

dsl158 wrote:

Polygonhell wrote:I'd disconnect the bowden tube (AT THE EXTRUDER not the hotend since on the V6 the bowden tube runs into the body), set the temperature to 250 and try feeding the filament by hand to see what it feels like. It could be clogged, or it could just be under reading temperature by a significant margin. If you have extra PTFE tube lying around, you could cut a short length off it and use that so you don't have to push the filament all the way through the long Tube. At 250C with ABS there will still be significant resistance, but you should be able to feed plastic by hand relatively easilly.

FWIW my V5's and my Kraken, with what I believe is the same thermistor all under read by over 20C when using the recommended thermistor in the firmware, so 220C is really just 200C. I use a custom thermistor in the firmware tuned to give a correct reading at printing temperatures.

If you can;t feed by hand at that temperature, and it's still clogging you'll probably have to disassemble it, it's not heard of for particles to be embedded in the filament, or maybe something left over from the machining of the nozzle.

So according to the thermocouple my extuder is actually at 127c when it thinks its at 240c

That's unlikely to be accurate, at 127C you'd never have extruded anything.
I find the best place to take the temperature of an E3D id at the interface between the aluminum heater block and the brass nozzle.

Polygonhell wrote:

dsl158 wrote:

Polygonhell wrote:I'd disconnect the bowden tube (AT THE EXTRUDER not the hotend since on the V6 the bowden tube runs into the body), set the temperature to 250 and try feeding the filament by hand to see what it feels like. It could be clogged, or it could just be under reading temperature by a significant margin. If you have extra PTFE tube lying around, you could cut a short length off it and use that so you don't have to push the filament all the way through the long Tube. At 250C with ABS there will still be significant resistance, but you should be able to feed plastic by hand relatively easilly.

FWIW my V5's and my Kraken, with what I believe is the same thermistor all under read by over 20C when using the recommended thermistor in the firmware, so 220C is really just 200C. I use a custom thermistor in the firmware tuned to give a correct reading at printing temperatures.

If you can;t feed by hand at that temperature, and it's still clogging you'll probably have to disassemble it, it's not heard of for particles to be embedded in the filament, or maybe something left over from the machining of the nozzle.

So according to the thermocouple my extuder is actually at 127c when it thinks its at 240c

That's unlikely to be accurate, at 127C you'd never have extruded anything.
I find the best place to take the temperature of an E3D id at the interface between the aluminum heater block and the brass nozzle.

That area is about the the target temp but the actual nozzle seems a little low because its at 180c

Polygonhell wrote:

dsl158 wrote:

Polygonhell wrote:I'd disconnect the bowden tube (AT THE EXTRUDER not the hotend since on the V6 the bowden tube runs into the body), set the temperature to 250 and try feeding the filament by hand to see what it feels like. It could be clogged, or it could just be under reading temperature by a significant margin. If you have extra PTFE tube lying around, you could cut a short length off it and use that so you don't have to push the filament all the way through the long Tube. At 250C with ABS there will still be significant resistance, but you should be able to feed plastic by hand relatively easilly.

FWIW my V5's and my Kraken, with what I believe is the same thermistor all under read by over 20C when using the recommended thermistor in the firmware, so 220C is really just 200C. I use a custom thermistor in the firmware tuned to give a correct reading at printing temperatures.

If you can;t feed by hand at that temperature, and it's still clogging you'll probably have to disassemble it, it's not heard of for particles to be embedded in the filament, or maybe something left over from the machining of the nozzle.

So according to the thermocouple my extuder is actually at 127c when it thinks its at 240c

That's unlikely to be accurate, at 127C you'd never have extruded anything.
I find the best place to take the temperature of an E3D id at the interface between the aluminum heater block and the brass nozzle.

This is so frustrating so its at the right temp or enough to melt abs and it still wont extrude

Okay, heat your hotend up to printing temp. Take a piece of ABS filament and touch the brass nozzle from the outside. Does it melt?

KAS wrote:Okay, heat your hotend up to printing temp. Take a piece of ABS filament and touch the brass nozzle from the outside. Does it melt?

Yes

The nozzle must be firmly pressed against the steel heatbreak. If plastic oozes between the heat break and the nozzle, it will jam.

Pull off the nozzle while everything is hot. Take the PTFE tube out. Cut a 1 foot section of filament and shove it in from the top and bottom.

If the filament doesn't make it through, get a very small drill bit and drill into the clog. Then try pushing the filament through by hand again.

dsl158,

Did you resolve your clogging issue with the E3D V6? I had the same problem and seemed to have resolved it.

1. Temperature - I set it at 230c; however, I think I can go lower than that, I just haven't lowered the starting temp yet
2. Bowden Tube - If you haven't already, replace the Rostock Max V2 stock bowden tube w/ the one you got with the E3D V6. I personally don't think it makes a difference E3D V6 people really want their stuff installed when they provide support
3. Bowden Tube - Chamfer the end of the bowden tube that fits into the E3D V6. I used a hobby knife, but I would have used a small pencil sharpener if I had one. The end will look like this \_/. This allows it to seat fully and leave less of a gap between the hot portion and cooler portion
4. Retraction - Less than 2mm. I start at .5mm retraction and worked my way up to about 1.7mm, which is where it is at now. The 'soft' filament won't retract back up to the 'cool' portion of the hot end and solidify where the tube meets the hot end. (note: This is probably the part I dislike the most, I'd prefer having more retraction)
5. There was a setting in Matter Control that set a 'pause' for low surface area layers. I turned that off. I was having problems with the hot end clogging when that happened.
6. Fully clear the clog:
What I do to clear the clog is to do this:
1. Remove the bowden tube and filament from the E3D v6
2. With a piece of scrap filament I will manually push it through until a small amount is extruded.
3. Then, holding the filament very still, I bring the temperature down to about 170c
4. Once it hits 170c I'll quickly pop the filament out.

What I'm looking for is to see if I"ve pulled any additional filament that may have gathered directly above the hot portion and below the bowden tube. I'll do this a couple times until I'm satisfied that I've got any residual filament out.

When putting the bowden tube back in, it must be seated all the way down; zero play up-and-down on the tube. It may take a couple tries to get it fully seated. If it doesn't fully seat, it will definitely jam again.

I was having problems printing anything at all. After doing the above actions I've had zero problems. Just completed a set of 32 parts and 50 hours of printing w/out any problems at all.

Finally, the E3D V6 are fairly responsive if you jump into their support system. They seem to truly want folks to have a good experience with their product.

Good luck!

Sean