So it looks like you can assist flow rate via scribing in addition to  thermal wrapping the barrel.
The other idea of avoiding  problematic masterpatch means restricted additives.
Is this just an issue of the friction becoming less as the additive slicks the barrel or maybe the
gummy plastic just does not adhere to the barrel.  I do have worries on the effect of additives wrt to torque and bending the barrel, motor is ruggard.

If anybody considers scribing, be careful and go lightly. I kept scribing a grove for several minutes, too much.

Yes the cutout does weaken the barrel such that impatient starting will twist it.  Been there done that.  Now I let it get up to temp and then wait an additional 10-15 minutes before starting the motor.  I'm thinking of putting a buzzer with a switch that will hook to the PID on the "up to temperature" pins or whatever it is called so that when it gets to temp, I will hear the buzzer, be able to then turn it off and then start a timer to let it finish heating.

Welding a pipe to part of the barrel would help, but would add possibly a fair amount extra cost to the whole assembly if elmoret doesn't have a welder as he would have hire out that step to an external welder which isn't cheap.

-os3dp

My quick pull apart extruder was simply modified by mounting the the motor wooden mount on a flat piece that bolts onto the main board.

The extruder is very sensitive to the friction in the barrel. Just a little scratches change the flow rate a lot.

the bent barrel straighted to the motor with washers on side.

Like I said above: If the stall protection board is configured correctly, the motor cannot generate enough torque to bend the barrel. If the barrel is bent it is possible that the bend cause the inner surface to be polished or otherwise altered. Running with a bent barrel is bad news. How did it get bent? Also you can't really straighten the barrel with washers.

What about the initial run of the included ABS that was in the instructions? Did you skip that? Why?

No.

The motor should not be able to "strain" more, it has a current limiting board which limits torque. You should be in current limiting at torques only 20-40% higher than normal running torque.

Generally no, depending on your spool diameter. You can get a faster gear motor for it, though.

Can the winder cope with 36in/min?

1/2 ABS and HDPE (shredded milkbottles on a large throated hopper, got about 5inch /min Filament brittle, snaps on bending.

ABS and about 1/3 recycled ABS print scraps. Go a dark brown filament,  Flow eventually stopped.

ABS and yellow/red masterpatch  from OSP in 1:32 weighed ratio. Beautiful filament with prober bendability, but 17g/hour.

And this quick flow 130g in under 20 minutes, ABS with 1:10 ratio diy masterpatch (too weak).

So I will have to file back the barrel.

I attempted to make masterpatch using CMYK ink on cornflour/starch for the powder and added about a tablespoon to 30g of ABS softened in acetone.  I put a 1:10 ratio in as I knew this was weak, but just got a background colour in the natural. Also bits of the masterpatch did not melt with this fast flow.

Yes I have tried wrapping the upper barrel and raising the temperature 10C. I will wrap a bit more.

People have recommended cleaning the barrel (some folks use a blowtorch) and running natural ABS to eliminate the masterbatch as a variable. Have you done that? Have you at least tried a run of natural ABS without colorant?

There have been exactly 9, including you. That is not a "lot", it is less than 0.5%!

elmoret (v1.3) - Problem happened after ~1500 hours of use, 95% MG94, 3% other ABS, 1% PLA, 1% ABS+black or green colorant. Prior to the clog, nothing my MG94 had been run for several hundred hours. Disassembled, removed plastic plug, reassembled. Problem has not resurfaced for ~200 hours since, extruding MG94 at temperatures from 180 to 190C. In the link, I detailed everything I observed - including the fact that after the barrel cooled, I could rotate the auger with a wrench - indicating the plastic was not even touching the walls of the barrel anymore. The jam occurred after heating up from cold - not after running for a period of time.
IanJohnson (v1.0) - problem happened after running Asaclean. Replaced barrel, problem did not resurface.
insta (v1.0) - problem happened after ~100 hours (5kg). Ran nylon pellets which seem to have pushed clog out.
digitydogs (v1.3?) Ran MG94 ABS and PLA for 200-500 hours, several jam/clean cycles to no avail. Two machines exhibit this behavior, two do not. One of the two exhibiting the jam ran GITD filament right before the jam, one of the machines that does not exhibit this behavior has run 50lbs of GITD filament.
kitcarguy (?) Ran GITD filament in the first few hours of use, jam occurred. Disassembled and cleaned twice, problem went away.
kszwab Improper assembly, problems stopped after correct assembly.
Ggalisky (v1.5)- Experienced 1-4"/min with MG94 and GP35 at 1.75mm diameter. Went up to 16"/min after clearing the clog, no issues since.
ericpaulbishop (v1.4) Experienced "dramatic slowdown", found that higher temperatures triggered it sooner, found that wrapping the barrel helped.

So then:
Myself, Ian: Cleaned barrel, no further issues.
insta - Purged with natural Nylon, no further issues.
digitydogs - Barrel replaced, no further issues. Also of noted that he has processed over 2000lbs of material.
kitcarguy - ran glow in the dark masterbatch, known to cause issues. Cleaned barrel, no further issues.
kszwab - improper assembly, no further issues after proper assembly.
Ggalisky - got a random plug of plastic stuck to the auger, cleared it, no issues since.
ericpaulbishop - experienced slowdowns, found wrapping barrel resolved it.

Yes.

What cases?

I do do customer surveys, randomly. Feedback is almsot universally positive. If I hear of someone having trouble, I try to help them. I'm trying to help you - I still haven't heard a complete list of the polymers and master batches you've tried to extrude. I also don't have an answer to the questions posed above. I'll repeat them here for clarity:

It is hard to troubleshoot and help users without a full set of information, but I'm trying.

Folks tend to post to forums when they have problems/questions, not when everything's going swimmingly. For example I love my Macbook Pro, but I don't post to forums about it. On the other hand I can find thousands of folks posting about the problems they're having with their Macbook Pro. Does that mean the Macbook Pro is bad? Of course not, they sell hundreds of thousands of the thing so a few folks reporting issues are a very small percentage of the population. Often times, those issues are self inflicted - water damage, downloading malware, not updating software, etc. Anyway:

There's tons of folks enjoying their Filastruder. Some examples:

http://hackaday.com/2014/11/24/custom-f … lastruder/
https://www.youtube.com/watch?v=TMi4F-RXKLI
http://www.filastruder.com/pages/testimonials
http://www.soliforum.com/topic/10862/pcabs/
http://www.soliforum.com/topic/10731/abs-3mm-extrusion/
http://forum.seemecnc.com/viewtopic.php?f=80&t=6285
http://ggabrielson17.blogspot.com/2014/ … er-is.html
http://www.soliforum.com/post/97499/#p97499
http://www.soliforum.com/post/88187/#p88187
http://www.soliforum.com/post/46570/#p46570
http://www.soliforum.com/post/56808/#p56808

That's just some off the top of my head.

Looking back over the previous forum pages there were a lot of people with slow extrusion issues.
Did they all get resolved? The dialog seemed to end without an acknowledgement of resolution in many cases.
Did you communicate with them by PM or email.

Perhaps at this two year anniversary you could do a customer survey as to how they are doing. For thousands of satisfied customers there does not seem to be much comment on this forum. Where are they all?
All of us want your venture to be as successful as possible.

Cheers.

elmoret wrote:

I've never quoted 300g/hr.

http://www.soliforum.com/topic/10892/speed/  just refound it

No, you found me saying that a couple users (out of thousands) with heavily modified Filastruders (not stock) and 3mm diameter filament (easier to extrude) report (but may be confused/dishonest) 1kg in 3 hours.

That is not me saying that the typical rate is 300g/hr. I have never said that.

No one has attempted this. It may make things better, or may make things worse. Have you tried the things the very experienced users in this thread recommended? (run natural ABS without colorant, increase temperature)? How about the things very experienced users have recommended in other threads? (clean the barrel)

I've never quoted 300g/hr.

http://www.soliforum.com/topic/10892/speed/  just refound it

I've scribed out my barrel so I am hoping for better than 17g/hr. It took a couple of hours to get the grooves as thick as possible with a right angled scriber.

The new barrel replacement that I received did not look like, on the inside , the typical black iron
piipe that you get at the hardware store. It looked like the inside had been sand blasted with rough grit.
That would be an excellent way to really rough up the insde of the barrel evenly if you have access to a sand blaster.
I was actually thinking of blasting the inside of my barrel sometime with rough grit to see if it would increase
my extrusion rate.

So 12 inches per min is a good rate.

Myself and others recommended not doing that. At this point it's clear you're not interested in following advice, so why post questions here? I genuinely don't understand what you hope to accomplish by asking for advice, getting it, then doing the opposite.

I do very much appreciate and value your advice.
I am university educated  and had a 20 year (short career) in IT research (no phD but basic computer science govt funded applied computer science). I say this in hope of gaining a bit more respect from you.

Regards the motor, Have you tired what I am doing? I probably am wrong, but why not try?
The paper linked implies something is there. Your point is noted of course, I will confirm it soon.
The noise is a major issue, given all day operation, its closeness, and the small amount of power < 60watts, this is a lightbulb.

Yes I stuffed up the flange geometry and would have saved my time and yours, sorry.

Still there is no actual internal end of auger to end of nozzle  dimension and its tolerance and subsequent effect on flow rate.
Remember there are three pipe threading tasks/ nozzle tightening to get within 1/8 inch tolerance of whatever this internal
vital dimension is. If people are having flow problems this dimension could be a quick check.

I have always tried to wait alt least 10  minutes at reported working temperature. I am experimenting with
different plastic mixtures so I am voiding any implied guarantees.  I have a setup  where I can unbolt the
motor and put a wrench onto the auger to feel the current torque, whilst the heater is still on. At times the
torque was guite large, yet the last full abs + 32:1 masterpatch was light to the pull. Still the motor grinded away
without the gears spitting teeth in all these cases.