calibrated yet still head colidding with filliment

[altarke]

I had my Rostock working fine. But I had to move it and then re-calibrated it because it was colliding with the filament it just finished laying on the bed while printing. this seems to be happening mostly on the center section. I though to myself it's delta radius issue but I pass the paper test when the head is in the center while issuing a g0 z0 command . Going out of my mind and regretting ever moving it.

Help please

[geneb]

Have you "paper tested" at the base of each tower? What was the result?

g.

[altarke]

Have you "paper tested" at the base of each tower? What was the result?

Re calibrated the MAX as per the instructions in the 2nd editing instructions doc - and yet...

[Polygonhell]

Can you just print the first layer and take a picture?
Usually it's either 0 being set too low, or too much filament being extruded.

[altarke]

upon close inspection of the problem - I have noticed, some of the PLA, as it gets deposited by the head, actually lifts a little from the hotbed and this is what the head rams into as it travels.
This, at times, happens in the crowded material areas ...
Did this help clarify the problem?

[altarke]

Can you just print the first layer and take a picture?

how do I upload it?

Usually it's either 0 being set too low, or too much filament being extruded.

OK then I will try raising the head a bit - but I have the paper test pass ok.

[geneb]

You might be over extruding too. A picture is really worth 1000 words in these cases.

g.

[altarke]

Problem solved!!!

Inspired by some of the magnetic arms designs I have seen on the forum I decided to try my luck and design one from scratch - and I did. I had the arms and effector mounted and calibrated and as soon as I tried to print the filament just would not stick. I went out of my mind trying to understand what went wrong and immediately I BLAMED MY DESIGN AS BEING FAULTY!!!!

Well as it turns out it was the fault of the glass plate. It seems as if the plate is just very slippery and no matter how much I clean it with acetone it will remain slippery to the touch. I had another plate just laying around and as soon as it was replaced everything just fell into place and stuck as it should. Not only that I see an improvement in the print quality, now that I am using my magnetic arms.

I am however very curious to understand what happened to my glass plate - I never heard of anyone reporting a glass plate turning slippery after some use. It may be time to look into the BORO glass plate offered by Seemecnc....