This topic contains 1 reply, has 2 voices, and was last updated by 
BHudson 6 months, 1 week ago.
-
Posts
-
Even though I have had quite a few problems with my Robox and already had to replaced it once, I really love it! However, while PLA works perfectly, ABS is really difficult to get right.
My main problem is that material is sticking to the nozzle during print and therefor failing. I have to sit and watch my printer complete at least a couple of layers before I can be sure that it should be able to print the object. The problem is that it’s sometimes struggles to remove the leftover material either that’s extruded before print or during print. The result is that it’s dragging a lot of ABS around while printing: http://i.imgur.com/lkclUh7.jpg
So… normally I set something to print, then I have to pause it, remove the material that it wasn’t able to remove before starting and then resume. The “Tip Wipe” works well with PLA, but not always with ABS: http://i.imgur.com/w848WX7.jpg
The problem w that if I’m, not pausing the print, removing the material this happens: http://i.imgur.com/sPioig8.jpg
Are other people struggling with this? Now my nozzle and print bed looks like this: http://i.imgur.com/Gn5urMb.jpg
What is the proper way to clean the print bed? I’ve wiped it with Isopropyl alcohol 70/30, but I can’t see to be able to remove the “mark” from my previous print. Should I just leave it like this?
Another question I have is about cleaning the nozzles. Is there a problem that they are covered in ABS? Should I clean them in some way and how? I’ve heard that they are covered with some non-sticky material that should prevent material from sticking to them. Is there a proper way to clean the nozzles and re-apply the non-sticky coating?
-
This topic was modified 6 months, 1 week ago by
NeoID.
@neoid That is pretty normal for ABS. It seems to like to stick to the nozzle more than most materials. I have the same issue and for that reason have disabled the lock on my Robox units so that I can grab that mini-purge before it wrecks the print.
The best way to clean the nozzles is to scrub them while at print temperature with a brass or aluminum wire brush. I heat the print head manually and then turn off the printer and pull the head off to clean it. Then I put the head back on, turn on the Robox, and let it cool.
You cannot reapply the non-stick coating. It is applied when the nozzle is made. It should not come off unless you are scraping the nozzle with a steel instrument or overheating the print head.
The bed should be cleaned with isopropyl alcohol. The patterns are normal; if you notice that you have oil or other leavings on the bed, that is what the alcohol is for. If the rough surface of the bed starts to get smooth again, you can rough it up with some 300 grit sandpaper or a kitchen scouring pad.
I operate two Betas and one Production Robox.
See my 3D Hub site at https://www.3dhubs.com/phoenix/hubs/ben -
This topic was modified 6 months, 1 week ago by
You must be logged in to reply to this topic.
