Hello, I am new to 3d printing and have been printing various random files I have downloaded from the internet. On some of the smaller prints with support I noticed that the nozzle would rub against the support making a clicking noise as it traveled back to start the next layer of print. Now I am trying to print a larger item which is facing the same issue since it requires a lot of support. But this time as it collides with the support it actually gets to the point which it rips the support off of the plate and ruins the entire print. I think the larger size of the print is compounding the issue. Has anyone else faced this issue before, know what might be causing it, or have any suggestions?
I wish I knew the type of filament, printing parameters, and other conditions.
Here is my experience with PLA. The print warped and the nozzle caught the warp and moved the entire build sheet.
The cause of the warpage was insufficient cooling time. When the printed material is small, the printed filament is not cooled sufficiently before the next filament is printed on top of it. The repetition of this process causes a large amount of warpage in the printed material. It may be less likely to occur if the print is larger, since the cooling time is longer. When printing small items, you could increase the printing time per layer by printing multiple items at the same time, or by slowing down the printing speed.
I can recommend this guide: Print Quality Guide - not having all details, your problems might IMHO relate to Overextrusion, Overheating and/or Curling/Warping. Also, a problem I had once, is retraction settings, more specifically the extra prime amount.
@ViperZ: Regarding the dislocated print sheet - had the same, did this - seems to work (but have only done 4 prints with it yet).
This is fairly common with taller prints. For anything with a lot of support material, I’ll usually enable a brim in Build Plate Adhesion. The supports don’t have much build plate contact, and the brim gives them that extra contact. There is a little bit of cleanup, but I can usually do it with my fingers. Only occasionally do I need a sharp knife.
That’s usually enough for me. I don’t mind a bit of contact with the support. But anything that clicks or starts pushing the material around can be a problem. If that’s happening, try enabling Z Hop When Retracted… that’s odd, I can’t find Z Hop in the Luban settings anymore. I swear it used to be there?
You might try slicing in a more capable program, like Cura or Slicer. I know Cura has the Z Hop option in the Travel section. Cura is pretty similar to Luban, just with a lot more settings. It only does 3D Printing though, no laser or CNC. Luban uses the CuraEngine library to do the actual slicing, so you should get pretty similar results.
Z-hop is still there…Luban lets you see all settings if you hit the ‘gearwheel’ icon, but defaults to a shorter list to show you after you’ve loaded your preferences. The three-lines icon edits what shows up in the list again…
(I’m not on the latest version but this change was made around 4.0 I think.)
I see, you made it so that the sheet would not shift. I added a fan to enhance cooling to prevent thermal deformation of the printed material. However, the fan is not linked to SnapMaker, so it is always on. Sometimes the second layer of the raft (48% for the first layer, 100% for the second) warps, so I turn the fan on after the third layer of the raft.
Since this is troublesome, I am thinking of using an Arduino to control the fan so that it can be turned on after the raft is finished.
I also have added a fan - the old printing module was really bad at parts cooling. Is there a reason you did not link your fan to the Snapmaker? Most people did - see here: 3DP Part Cooling Fan 5015 Replacement
I read the thread there too. I wanted to try it out, but didn’t feel comfortable taking the module apart.
Just recently I got a new 3D Print module. So I tried to disassemble the old module, but the electrolytic capacitor on the board was removed during disassembly. XD
I repaired it, but I don’t want to do it with the new module.
Today I created a fan control board.
I edited G_CODE to perform a lift motion of about 20 mm on the Z axis immediately after the end of printing of the raft.
I use an ultrasonic sensor to detect this movement and turn on the additional fan.