Layer 2 no bonding with layer 1 (brim/ramp)
OK, this is one I can not figure out.
Fliament - PLA
Nozzle - .3mm
Temp 200c
1st layer - .2mm
other layers .1mm
Bed is level on all 4 corners and center (equal resistance on paper)
Printer - Geeetech I3 X
Object printing - cylinder with hole inside diameter is 31cm outside edge is 35cm, height is 30cm
When I print the first layer, it goes on beautiful, nice and smooth, not under or over extrusion, sticks well to the painters tape with glue stick.
However, when the second layer starts, it starts around the outside perimeter (it does 3 passes per layer) about 1/2 way around it does not stick to the first layer. It does this for about 10 layers till there is enough filament on the bed that it then creates the cylinder. The beginning of the print is screwed up but it finishes ok.
What could be my problem with the 2nd layer adhering to the brim/ramp layer ?
Any Ideas?
Thanks in Advance,
Israel
Comments
as i read you check distance with paper.... is it at Z Zero?
Why i ask this Question is as follows:
If Z Zero allows paper between Bed and nozzle you have a real distance of lets say about 0.05 to 0.1 mm
your first layer is 0.2 mm so your real distance is 0.25 to 0.3 mm and your nozzle is 0.3mm.....
thats why your first layer looks that good... BUT your nozzle has round shape and that´s the problem.
there is not enough area to contact second layer.
see here :
http://forums.reprap.org/read.php?406,692662,693541#msg-693541
and follow for example :
http://reprap.org/wiki/Triffid_Hunter's_Calibration_Guide
first of all calibrate the extruder with the 100mm Test followed by a single wall.
or for quick test reduce first layer height to 0.1 mm (if you are shure your bed is levelled correctly)
kind regards,
RAyWB