Calibrating extrusion on Ender 3 Pro - First Time

[Cogliine]

Just got my Ender 3 Pro and I'm trying to calibrate extrusion for the first time. I've clearly made a mistake somewhere along the line so I'll lay out the whole process for troubleshooting.

1. Downloaded Pronterface
2. Connected over COM3
3. Command -> 503
   
   1. Returned values M92 X80.00 Y80.00 Z400.00 E93
   
   
4. Heated up the nozzle to 190 degrees
5. Marked 120mm from where the extruder "eats" the filament
6. Command G1 E100 F100
   
   1. The printer rolled it backwards and I ended up with 222mm of filament from the mark to where the extruder "eats" the filament. (this was the opposite direction of movement I expected but I could easily calculate the distance travelled)
   2. This means that 102mm of filament was pushed instead of 102
   
   
7. New E-value calculated
   
   1. 100/102 *E200 = E196.08
   
   
8. Command M92 E196.08
9. Command M500
10. Command M503
    
    1. Returned values M92 X80.00 Y80.00 Z400.00 E196.08
    
    

Now the article I read (linked here: https://3dnation504795197.wordpress..../#tempsettings) suggested doing this process a few times for the best results. So because of this, I repeated the test. When I ran it again it extruded 170mm of filament. Far past the desired 100mm. I've clearly messed something up but I'm not sure where.

I'd appreciate your guidance

[mrfrizzy]

I used the built in configuration options on my Ender 3 Pro rather than doing it through the computer. Having the extruder at the default 93 resulted in less than 100mm of travel. I don't recall what the amount was, but I simply took 93 * 100 and divided that by the amount that was actually extruded. That gave me a value of 97.2 for the new E value. After doing that, it hit 100mm pretty much exactly.

all3dp has a good guide. https://all3dp.com/2/ender-3-calibra...-your-ender-3/