Prints support get loose / prints are knocked over  

RE: Prints support get loose / prints are knocked over

@joantabb

Hi Joan, thank you for replying :)!

I've used alcohol 96% to wipe it clean pretty good. Is this an issue with the Z axis? Or could it be something else?

I'm pretty sure I've done my best to clean the sheet. I'll try to use dish soap too tonight together with the link you sent.

RE: Prints support get loose / prints are knocked over

First, wash with dish soap, alcohol does not clean everything.

Second, first layer calibration is very important.

Both above are needed to get it stick at highest level.

How to do a first layer calibration:

Small parts, with small foot print on the bed, use a big brim attach to model.

Same for big flat parts, use a big brim.

Extra you can use glue stick.

RE: Prints support get loose / prints are knocked over

Posted by: @marcostuurman1994

[...] After a couple of prints, now the supports are not staying on the bed (see picture) and prints get knocked over. (another picture)

I've tried lowering and raising the first layer, heating, cooling, cleaning the heatbed. Higher/lower temps on the filament. Mesh bedleveling on 7x7. Ran the wizard again. But nothing seems to help...

As Joan notes, good adhesion is essential. Any time you make a hardware change like a nozzle swap, definitely re-do your Live-Z calibration. Jeff Jordan's "Life Adjust" procedure is very effective and easily understood. For doing the same with a 0.25mm nozzle (or any other size), you can just generate your own 75x75x0.2mm print or print the Prusa logo first layer. Bed cleanliness is particularly important for using a small nozzle. The magic behind the "Dawn wash" is the sheer volume of liquid washing away built-up crud rather than just moving it around as you do with alcohol. 

I'm not clear on whether your 2nd picture shows a print or support. If you've got your Live-Z calibrated properly and the bed is clean, anything printed should adhere firmly to the PEI print surface throughout the print. Here's an example with a 0.25mm nozzle on smooth PEI:

Definitely master these 2 steps to get good 0.25mm results. That should take care of parts coming loose mid-print and making a mess.

RE: Prints support get loose / prints are knocked over

Thanks for all the replies! I'm currently at work and am unable to give a comprehensive answer. It's great to feel I'm not alone and there are people willing to give me great advice. I'll spend the evening calibrating and cleaning before trying once again 🙂

RE: Prints support get loose / prints are knocked over

Good Luck Marco!

regards Joan