Parts knocked over

[klauschen 0]

All my parts that I print on my Ultimaker S5 are being knock over. I tried different material and both print heads. At the same time the print nozzle's spit out small pieces of material onto the plate. This started about a month ago. Possibly after I installed Ulitmaker 6.1.1.    Any suggestions?   Thank you,  Klaus

[gr5 2,173]

sometimes the nozzle can hit the part pretty hard when you have overhangs but your part should stick very very well such that it doesn't get knocked off.

 

What material are you printing?  PLA?

 

[klauschen 0]

PLA and PETG. It does it with both materials. I releveled the plate and it still does it at different points of the part.

Thanks for your response, Klaus

[gr5 2,173]

Are you using any kind of glue or spray on your glass bed?

 

Clean the bed very well.  Probably best to remove it from the printer, clean it with scrubbing brush or spatula and hot soapy water.  Then clean it again with glass cleaner to remove any extra oils and soap.  Then put it back on the printer without getting your finger prints on the glass.

 

Next there are so many options.  Magigoo?  hairspray?  glue stick with water?  But my favorite is elmers wood glue mixed in a jar with 10 to 20 parts water with 1 part glue.  Regular elmers glue should work well if you don't have the wood glue.  Put the lid on the jar and shake it up well then open and apply a thin layer onto the glass bed.  I use an old crappy paint brush and rinse the brush for a few seconds after each time.  Heat the bed to 60C or hotter until it dries completely.  You should be left with a very very thin layer that is almost invisible.

 

Now print on that.  Your parts will stick really well.

 

Also if you have parts that are more than 50% as long as the bed then consider adding brim (versus skirt).  Brim helps hold down corners - particularly square corners of parts.  Brim is under "build plate adhesion type".