asking for calibration input/review

[uwes]

hi,

would be glad to get some input on my calibration snapshots. the used material is abs from fabber-parts.de (cheap but doesnt seem to be good quality). anyway,


first i did run with the 0.5 single wall (slic3r, 1 perimeter,0% infill,.5 nozzle (officially - didnt really crosscheck but the filament floating from the nozzle is ~.55-.60), .55 extrusion width,...)

the normal abs temp (230C+) seems too hot (walls too wide, layers not recognizable):

at ~210..215C walls are getting better (can see layers, wall width going down to .63, cube destroyed due to stickyness issues - blue tape didnt work)

now i changed the extrusion multiplier to (.55/.63)=.873 and the cube is looking better.

printing the full cube (100% infill) is also looking ok to me (left side, right side is an aborted cube with flow=1)

questions/input?

- is there a path to reliably figure out the temperature offset (abs vs measured)?
- what is the typical abs tempature others are using? (measured)
- what is the temperature offset?
- are there other ways to determine the right temperature?
- other observations from the calibration cubes?

thanks
/uwe

[foshon]

By flow modifier are you referring to the selection on the same page as the nozzle size? If so, .5 is too much modification. You will be ahead of the game by calibrating your extruder a bit more. Read polygonhell's extruder calibration post, follow the directions: http://forum.seemecnc.com/viewtopic.php?f=54&t=1163

Temperature is a little tougher. Plastics seem to vary by 5-30 degrees based on manufacturer and color. Your best bet here is to figure out what works best for your material and go with it. You are doing exactly what you need to do to figure out the correct temperature.

[uwes]

i changed the "extrusion multiplier" to .55/.63=.873

[foshon]

I would recommend doing the basic calibration even at .83. The only time I have ever been that far from 1 was when my extruder was slipping horribly. Pull the filament out of the hot end. Mark the filament going into the extruder 100mm back from an easily measured point. Run the extruder 100mm forwards and measure the distance from your mark in the same spot as the first measurement. Multiply your current s/pmm by 100 then divide that number by the actual amount filament it moved (100 - what you measured). That number becomes your new steps per mm. Make sure you set the extrusion multiplier to 1 before you start. Hope it helps.