ive printed this with pla and later on i noticed the bottom layer idk no sticking to the model what could be causing this
i print with a printrbot metal plus …heated bed …kapton tape
below are pictures of settings and problem after my bed cooled i heard the print crackling i am guessing this was the layer coming off the print bed as it cooled
I like to set it in cura to print the bottom layer slower than the rest of the print
Try printing at 190C instead of 210 also use a .254 first layer height with a .2064 layer height this is the values given to me by the prusa calculator they are also the values that I use. If any lf that does not work try and move the z offset lower by using the M212 command followed by Z-.value.
Am gonna try that do you think my settings are ok
Just looked at the pics of the print without a doubt the z offset needs to be lowered a ton.
You could try to bring the hot end down just a little bit
That’s what it looks like to me
ive never had this and when this print was done the fist layer was no sticking to the 2nd but ill check and see if the temps and speeds help the tension on belts and everything is ok i was away from my printer when i heard a crackling sound and i was thinking as the bed cooled maybe caused it idk we will se after adjustments because i usually remove my prints before the bed cools i never had this
does it have to do anything with shell thickness or bottom layer thickness
No you need to calibrate your printer
no its calibrated ive made many prints before and after i just noticed it with this one also to add my fan runs at the very first layer is that bad beacuase ive see people that use kaptop with heated bed make the fan start at around default maybe that is the cause
Dose the model have a flat bottom?
I am betting my fan starting to cool it does not let the second layer stick very well
You can try but I think it’s the hot end is to high.
Ok I’ll check my cooling and hight
Hi Greg,
… I don’t know where to start.
Your 1st (and second layer) show clear signs that each strand is not touching each other.
What I would advise you :
Do not put 200% on 1st layer width : with 0,3mm height it puts too much strain on your extruder. Try going back to 100% and rechecking : your Z offset (M212, M500, M501), your extruder ratio, your filament diameter.
In fact, I would advise you to make a smaller 1st layer (0,1mm ; 0,15mm ?) rather than a bigger one. When you have levelling issues or planeity issues it is the way to go. However, I own a Metal Plus Dual and never had to do this to deal with levelling or planeity. So either you don’t need it at all or perhaps you just need to adjust the mechanics better.
Not relevant but I would still do :
- change your layer height to 0,2mm (why 0,1984 ??)
- change retract speed to 30mm/s
Have a nice day
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Ok I’ll have to recheck all. My settings
I am still. Very new to Cura and overall 3d printerting
You can get a file that you run I cura that puts in recommended settings for your printer
