I wanted to try to print with water soluble PVA.
So far results have been less than spectacular. It seems I have destroyed at least one nozzle, maybe two.
I am trying to use the second nozzle for pva, the first one with PLA.
Is anyone having any success printing PVA support structures with the K8400, and if so, how are you doing it?
You can’t print PVA with a boyden extruder. It will clog your nozzle almost every time.
Is it that impossible and bad?
May a shorter fedder in the extruder wont give that much pressure on the filament?
Or where is the problem with the bowden one?
Ok, thats very discouraging, but its nice to get an explanation at least!
Is there some other filament type I can use for support that is easy to remove then?
It doesn’t have to be water soluble, just easier to remove than PLA.
I didn’t test it but I read a review about a new PLA filament from Polymkr (Polysupport) to print support. It’s PLA but they say it doesn’t stick so it’s easy to remove. Read [color=#408040]here[/color].
I have ordered a roll of that Raby a couple of Days ago and it was expensive $36 for the roll and $26 for the shipping. But i was currius enouph to order a roll just to test it out 
// Marlark
Hi Marlak, keep us posted when you test it to know if it’s worth the investment.
Will do! It should arrive in a couple of Days. According to FedEx it should arrive here on the 28th. How accurate that is i donno.
// Marlark
HIP is soluble in D-Limonene. I have some and it prints similarly to ABS, but I haven’t sussed out all the issues with it. Velleman sell it so it should work fine, but then again there’s a lot of things that don’t quite work as intended on the Vertex.
[quote=“Marlark”]
Here we go 
time for some testing.[/quote]
How flexible is it?
So far on the 2 tests i have done … i have had a couple of issues. Funny enouph the first one was just simple speed, temp and multipliers settings changes to fix. Second test Went alot better untill my primary printhead decided to get stuck so had to take it apart and remove the filament part that had a blob part on it. But the print Went well up to that Point. It is more flexible then PLA but not alot. It is more brittle. very easy to take apart witch is the object of the filament type. i found out that it need alot more heat then PLA or else it wont flow good enouph.
So with other Words id say it is something between flex and PLA more closer to pla. But yes it is flexible but not alot. Im wondering if it is a compound mix between pla and pva. Just a gues but would strangely enouph make sense.
Time to put my printhead together again and redo this
// Marlark
ok I have managed to print my first complete print with PolySupport YAY!!! I have learned alot. That is for shure.
After some tinkering around. I got a working setup. Now i can finetune it. I know i have the multiplier a litle to low so going to raise that for my next one and i am going to put in dense layers to make the bottom hangover walls more pritty . But now atleast it works. Going to post some Pictures later. Not the most pritty Pictures but prof of working consept atleast. Gonna share the settings i use for this also for those that want to try this. But i have to say i am fairly impressed. Dead simple to remove the support material
// Marlark
It is not the best print i ever made but beeing the 3rd attempt on polysupport i Think it turned out fairly ok.
Thanks for posting. I think polymakr are one of the best filament makers out there and their stuff is always worth a try. Looks like you got a pretty clean print after you’ve removed the supports.
Adding a ooze shield and dense support layer makes it a very nice result and a very handy support structure solution. Unbel simple to remove the support and not to hard to print eather. It act very simular to PLA exept that you need a litle hotter printhead and a very short retraction setting.
I used this
Temp 225C
1,3 mm Ret dist.
25 mm/s Ret speed
1,1 Ext Multiplier compared to my 0,9 for PLA
I have tweeked the Support Infil perc and dense infil perc depending on the width and height of extrusion.
Tool change ret is at 12 mm and i use 10mm/s ret speed. and i have a extra restart dist at -0,5 but that is something im looking at atm. together with the Prime pilar.
time for some testing.
