Interesting, i had quite some problems getting it to stick, but i was using glass with PVA glue...
yellowshark 153
I do not have a UM, I have a 3ntr. They are very similar in design although the detail of the drive system is different - no idea if this would impact ease of use I terms of feeding in the filament but I suspect not.
yellowshark 153
I do not have a UM, I have a 3ntr. They are very similar in design although the detail of the drive system is different - no idea if this would impact ease of use in terms of feeding in the filament but I suspect not.
Edited by Guestyellowshark 153
Interesting, i had quite some problems getting it to stick, but i was using glass with PVA glue...
I wonder if you are measuring the temperature of the bed or the glass? On my printer the temp sensor measures the bed not the glass plate. So to have the plate at 80 I set the bed to 88, checking with an IR thermometer.
It might be worth trying some changes to nozzle to bed distance, although I just went ahead with my PLA setting and it worked fine.
You could mail Colorfabb and ask if they were using a glass bed and if so what adhesive they used.
Maybe I was lucky but I never have any problems with PLA adhesion and nGen worked fine first time too.
yellowshark 153
Interesting, i had quite some problems getting it to stick, but i was using glass with PVA glue...
I wonder if you are measuring the temperature of the bed or the glass? On my printer the temp sensor measures the bed not the glass plate. So to have the plate at 80 I set the bed to 88, checking with an IR thermometer.
It might be worth trying some changes to nozzle to bed distance, although I just went ahead with my PLA setting and it worked fine.
You could mail Colorfabb and ask if they were using a glass bed and if so what adhesive they used.
Maybe I was lucky but I never have any problems with PLA adhesion and nGen worked fine first time too.
yellowshark 153
Ok I printed another two copies of the hydraulic cylinder shown above. This time I pushed the temp from 245 to 255. I also raised the speed from 30mm/s to 40mm/s. This time the layer adhesion was so much better. The first I ran with 50% fans and pushing in the cylinder hard I eventually got a single layer separation at a point I would call a "point of weakness" where the circumference narrows.
The second print I ran at 20% and when I gave this print the same physical abuse it remained perfect. Cannot recall if the discussion on nGen had a view on best fan rate
Hi, I've been experimenting a little with nGenFlex.
So far, the only way I can get reliable bed adhesion is with BuildTak (which is what ColorFabb recommend). Using the S3D settings recommended by ColorFabb.
Head temp: 255
Plate temp: 85
Fan: 0%
Just an update - I'm giving up with this stuff for the time being :(
After some good results with small parts, I thought I'd go for a bigger print (around 15 hours running at 30mm/s at 260 degrees)
It's failed at the same point 3 times now - it seems to be around the 2 hour mark where the material jams in the extruder.
What seems to be happening is that as the material is fed through the extruder it twists, and after around 2 hours it's twisted so much that it eventually coils and jams in the extruder.
This is in an UM2+
yellowshark 153
Thanks for the update @sammo. My longest so far is 2hr 42min and that was fine. I have a 3ntr. I think both drive systems are architecturally the same but are implemented differently. I will see if I can do a longer print next week
I discovered that the tension on my extruder was more towards the top than towards the middle of it's range. So I'm going to give it one more attempt with the extruder tension turned up some more and see if that helps.
I'd really love this stuff to work, the tests I've tried with it have been very encouraging.
Success!
I think it was a combination of two factors causing me problems, firstly the tension on the extruder needs to be firm and secondly, with a full roll of the material it was coming unravelled slightly and wrapping around the spool holder.
Printed a pistol grip with 40% infill over 15 hours (checking regularly for the filament getting caught up) and it's come out very well I'd say.
Running at 260 degrees at 30mm/s I had a little bit of stringing between the open section at the top - Unfortunately I cleaned it up with a scalpel before I took the photo's so you can't really see. Running at a lower temp would help a little there but I'm not unhappy with the way it turned out.
40% infill and 1.2mm walls makes the grip fairly solid but still with a little give in it and it feels very nice to hold.
The slightly shiny finish on the black NGEN Flex and a combination of running at 260 has worked quite well to hide the layer lines (this was printed at 0.16mm layer height with a 0.4mm nozzle).
Anyhoo... I'm happy with it and I'll be experimenting some more.
Edited by Guestyellowshark 153
v. nice print, glad to hear you solved the problem
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00D00B 58
Hi,
Thanks for this review ! What UM model do you use ?
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