Slipping on 1st layer and infill

[3dnerd 5]

Dear all,

I see that I have frequent slipping, that means I hear this tock, tock noise coming from the back of my UM2. Almost on 1st layer and infill, perimeter is OK.

I print white PLA from Innofil at 220 degrees (instead of standard 210 degrees).

But this higher temperature did not solve the problem.

The 1st layer prints very well, and the paths melt together nicely.

The only problem is the slipping.

Is this a real problem I have to take care? Or is some slipping here and then 'normal' and I don't have to take care?

Thanks...

 

[gr5 898]

If you are happy with quality of bottom layer I would ignore it. If you really want to fix it you have to adjust your leveling slightly and give the nozzle a tiny bit more gap. Maybe 1/4 turn on each of the 3 screws.

What is happening is the bottom layer is probably 0.3mm and you actually only have space for 0.15mm so there isn't always enough space for all the PLA to go and so the pressure builds up very high in the nozzle until eventually the feeder gives up and slips back a bit.

But it is better to print .3mm in .15mm space then the other way around (.3mm in .4mm space) as the other way around will give you bad adhesion to the glass.

 

[3dnerd 5]

Hi gr5,

thanks for making this clear to me!