Pint failure on larger area print  

Re: Pint failure on larger area print

I had the same issue with a long print. Nozzle sometimes starts to grind on infill, sometimes so strongly that the nozzle gets stuck and belts skip/axis'es shift.

Re: Pint failure on larger area print

it definitely looks like the belts are slipping
did you hear any clicking sounds?
do you notice the belts wobbling when you are printing?
as the print head changes direction quickly do you see the belt wobbling
have you checked the printer for flatness? is it on a flat bed or desktop -do you keep moving it?
i did a post on belt tension
https://best3dprinter.stan-tech.com/3d-printer-belt-tension-is-it-important
i can also add that i am trying a suitcase scale to check belt tension -will keep you posted.
the other problem is warping of the model. if the fan is blowing too much and you are putting down thin layers these can warp upwards and catch the nozzle as stated above.
have you printed a large calibration model - only need to be 0.5mm thick but needs to cover most of the build platform?

Re: Pint failure on larger area print

I think that the belts are ok and no belt slipping is happening. Correct me if I am wrong but I believe that after belt slip on x & Y directions, next 9-point calibration would fail. And belt slip would happen on all prints. But but I have printed more objects successfully after that failure. My printer is on flat surface and I do not move it. I will try that large calibration test when I have time. But I have printed Bukobot Fly gliders successfully.

Re: Pint failure on larger area print

Correct me if I am wrong but I believe that after belt slip on x & Y directions, next 9-point calibration would fail. And belt slip would happen on all prints.

You are wrong and therefore I will do as you request 😉

At the start of a print, the axes are homed and their positions are reset prior to the 9-point calibration.

Slipping may not occur on all prints; this is something which happens mainly on larger prints although some small models are not immune from the problem.

A good thing to do is to limit the acceleration by inserting this in to the start GCode:

M201 X1000 Y1000 E600

Peter

Re: Pint failure on larger area print

Thanks Peter! I think acceleration can be set also in Slic3r settings. What is the limit setting in your command row?

Re: Pint failure on larger area print

Martti

The accelerations settings are as my previous post (the M201 command) but those are "safe" settings. My printers can handle values 50% more than stated.

The problem is that the default settings in the firmware are way too high (9000), the assumption being that the slicer will insert the acceleration commands where required. However not all slicers do tah and assume that the acceleration is set correctly within firmware...

Peter