Tall prints
Hi all,
I'm having a problem where tall prints seem to keep building up more than their programmed layer height (sometimes specifically on one side) and, as the print goes on, begin to be scraped/touch the nozzle. This usually ends with the print popping off the print bed.
Particularly, I had this problem while trying to print a bottle stopper (truncated cone, ~20mm diameter base, ~60mm height) and the print would fail at the same height (~45mm) each time. All tries have been with PLA and a 0.15mm layer height @ 60mm/s.
Has anyone else encountered this problem? I'm pretty new at this and much of it is still a mystery to me.
Thanks!
Re: Tall prints
Seems like overextrusion.
Step 1) Check you filament diameter:
Take a caliper and mesure the filament diameter (on two sides) in many points.
Use the average value as the filament diameter in your slicer.
Step 2) "estep" calibration
mark your filament 100mm behinf the hole it enter the extruder.
ask your printer to advance the extrusion by 90mm
for example, with a file containing;
G21 ; set units to millimeters
M83 ; use relative distances for extrusion
M104 S210 ; set extruder temp
M109 S210 ; wait for extruder temp
G1 E90 ; extrude 90mm
If your filament marke is now exactly 10mm behind, it's good. If not, you have to modify the 90mm in your file and repeat the process. When you have your good value (for exemple 83), you can divide it by 90 to have your extrusion mult (83/90 = 0.92) and set that in your filament extrusion multiplier in your slicer.
This parameter shouldn't change with different filament and should be given to the printer firmware but I don't know how to do that.
IMO
Re: Tall prints
Thanks!
I've calibrated this before, but will give it another go, just in case!
Will post pictures of the relevant builds later, in case anyone can come up with an alternate explanation