Change to sizing of Taluman nylons?

[yellowshark 153]

Hi, recently I tried 645 for the first time and for a few prints everything went well. I was pleasantly surprise that it stuck to the bed on my first attempt.

Then I got under-extrusion then an almighty filament jam that took ages to sort out. I read that many people have had problems using Taulman on Bowden tube printers and I was certainly suffering from sections of it being too wide and grabbing inside the Bowden tube.

I heard the other day, from a reputable source, that Taulman have recently reduced the filament width by 0.05mm to try and help with the problems.

Has anyone have on knowledge on this? Is it true? Have the new sizes fed through the supply chain yet to hit Europe? How do you know you reel is the new size?

 

[yellowshark 153]

I heard today, direct from the horses mouth, that following the uptake of 3D in Europe and Ultimaker users trying nylon, Taulman retooled and the size is now set to 2.85 with a maximum of 3.00. It seems that originally a lot of units (in the States?) were using 4mm ID bowdens. My UK supplier offered to replace my spool and we agreed to wait until their imminent new delivery in case their stock contains any of the old measurement. It appears that the label has not been changed to say 2.85. so it is not obvious what you have.

I am going to print a width gauge and run the spool through it when it arrives in about 2 weeks

 

[skint 62]

Keep us posted Shark, id be interested in trying this out if they get it sorted.

 

[yellowshark 153]

Will do Skint. I have a Canadian customer who gets back from Florida in 5 weeks time and he wants some stuff to be waiting for him, so getting this sorted is high on my priority list.

 

[jino 0]

I've just completed two 40-hour prints with 645 with no problems, so it is at least possible to get reliable large prints with it, if you get a bowden tube with good tolerances.. I've ordered the new Bridge filament also, will be interesting to try.

[yellowshark 153]

Perhaps you could update us with your Bridge experiences Jino.

I am using 645 because of its bio-chem properties

What bed and extruder temps did you use for the 645?

 

[DidierKlein 729]

Hi,

A bit of topic sorry but i'm looking at nylon and i was wondering if the fumes are annoying or not?

I read http://www.taulman3d.com/645-features.html which claims that the fumes are not toxic but does it smell?

The do say that you have to ventilate the room so i was wondering.

My Ultimaker 2 is in the room next to my daughter's bed room i don't want her to breath something bad...

 

[yellowshark 153]

From my limited use of 645, maybe 6 hours printing, I detected nothing and the workshop was not ventilated. The same applies to t-glase but that was with very limited usage.

 

[thirdsurface 0]

I have tried a couple prints with the bridge, printing at the standard 3.0 diameter and .4 nozzle. It extrudes fine, but I can't get it to stick after about 5 layers. Always starts to pull up in the same corner but I know the bed is level

I'm using a heated bed at 100 and hairspray; I also tried on garolite with Elmers, but no luck.

What else can I try?

 

[yellowshark 153]

Well you could try a lower bed temp.. When I was trying t-glase unsuccessfully I read a post from one guy who was using around 40 degrees with success and another guy who was using 110 degrees. Now that makes no sense but it could be you are running the bed just too hot. Unfortunately, at least the last time I looked, the Taulman website makes no comment on bed temperatures.

I ran 645 successfully with 60degrees.

 

[thirdsurface 0]

Thanks for the tip, I thought of the same thing during my last print, because 70 degrees is also apparently no good either.

I did have the foresight to print a massive brim on the object, and I ended up taping the entire thing down with Kapton.

haha whatever works.

I'll try lowering the temp again on my next try.

 

[jino 0]

Hi, now I have finally tried the bridge also. For me the filament is 2.85mm, if you also have that diameter you should change the diameter setting in the printer or it will not extrude enough material. Make sure the nozzle is very close to the surface.. I usually adjust the height on the fly while it is printing the brim. The lines on the brim should flow into each other..

Bridge is the best nylon I have tried yet. I have only tried small prints, but I can use glue stick on glass! It appears to be sticking a little better and also warps less, like it says on the Taulman webpage. I use a 5 line brim and 40 degree buildplate. 247 degree nozzle.