Extrusion Multipier significant digits and set methods.
Hello forum!
Core1 3.4.0. For whatever reason I'm trying to set my extrusion rate at 100% * 1.02564103.
Method A is to alter the printer pre-script in prusaslicer changing "M221 S100" to "M221 S102". I tried "M221 S102.56" and it does print, but I'm unsure if it uses the fraction. Due to conditions my measurements are currently unable to detect the .5mm in 100mm difference (separate issue). Eventually I'll be able to get a better measurement, but I wonder if one of you has tried fractions here?
Method B is to create a custom filament profile and set it's "Extrusion Multiplier" to 1.0256. I tried this and sliced but I cannot find it in the slicer's output gcode. Does anyone know how this shows up in there, or if is it applied during printing? How many decimal places can I add here and have an effect? How can I see what's happening?
Method C used by Ellis on Marlin is to set the M92 axis steps which is very precise especially if using M350 micro stepping (if implemented). However M503 does not report the current axis steps setting so I don't know what to set E to. My guess is that Prusa doesn't want us to mess with this in that way. Does anyone know how to return the current M92 setting? Does it even exist on this machine?
My machine is in pieces so I can only run a few more tests on there right now, but I think it's a good collection of questions. ...and I'll test pretty soon. Referrals appreciated also.
utah
RE: Extrusion Multipier significant digits and set methods.
I fixed my issue with measuring, planetary gears were misaligned causing skipping.
When asked to extrude 100mm of filament it extruded 97. Adding M221 S103 to the prescript produced very close to 100mm, so that's what I'm using for now.
I ran out of orange filament (easy to mark with a sharpie) so I didn't try a fraction on M221. I'll hopefully come up with a hot process for this and may fine tune from there using the filament profile.