Im still quite a newbie in this realm and i guess the amount of variables are getting to me
Backstory is I have a zesty nimble, which worked amazing but had 2 issues I cannot solve
- Ripples in the surface finish - Company is still working on a fix
- blobs at the end of a layer creating terrible Z seam scars
Tried all the ideas such as coast and wipe, but they have their own issues such as only available in some slicers, cannot be used with firmware retraction, etc.
Pressure advance by the sounds of it should eliminate the blobs at end of layer, but any attempt to use PA with a nimble due to its required low jerk values caused my prints to slow to about 3x the time. Was painful to watch.
Although, with the nimble I was able to get a great calibration part from the above enclosed script.
With the nimble, the calibration part has easily discernible reversing thick areas, and one can find the "best" setting of 0.12, but pressure advance was unusable for me in combination with the nimble.
So I order a Bondtech BMG and use a capricorn bowden tube of about 650mm paired with an E3D 0.9 degree stepper.
Now i get the Esteps all setup at E808, run some retraction calibration parts, and i still get blobs due to pressure at the end of a layer.
Run the above scripts on a Pressure Advance test and..... The results do not make sense to me.
Before the extruded line ever gets to an optimal state, the extrusion is messed up. It gets to the point where nothing is coming out of the nozzle at all. I was at 5-100 print speed so ran again at 20-80 which is the speeds I actually print at (E3D volcano, 0.6mm X nozzle)
And again the part never gets to the optimal PA value without the PA settings making the filament retract so much it doesn't print.
What am i doing wrong? Any suggestions?
Duet Wifi, Smart Effector, newest firmware, Delta printer based smilar to DC42's large kossel
Config is as follows :
M350 X16 Y16 Z16 E16 I1 ; Configure microstepping with interpolation
M92 X200 Y200 Z200 E808; Set steps per mm original
M566 X1200 Y1200 Z1200 E2000 ; Set maximum instantaneous speed changes (mm/min)
M203 X18000 Y18000 Z18000 E3600 ; Set maximum speeds (mm/min)
M201 X1000 Y1000 Z1000 E3000 ; Set accelerations (mm/s^2)
M906 X1000 Y1000 Z1000 E900 I30 ; Set motor currents (mA) and motor idle factor in per cent