Unanswered Not extruding during print.

So if you lift it in the air center of bed, mark 100mm of filament and then tell it to extrude (when hot) 100mm -- how much extrudes?

It may be as simple as the nozzle too close tot he bed (Z offset incorrect).

 

So move the extruder to the center of the bed, have it in the air -- off the bed.
Find a reference point for the filament above the extruder... just a reference point -- anything will do. Make a mark ...
Manually extrude 100mm of filament.
Measure how far your mark moved from the reference point. If things are working correctly it should be 100 mm

Z offset should be whatever your printer needs to get a first layer like this:

https://www.printedsolid.com/blogs/news/37035715-get-your-prints-to-stick-check-your-skirt

It will vary a bit for every printer, but usually it is <1mm.

If you use the stock version of marlin and you use automatic bed leveling then this is how you adjust it -- edit your slicer to use this as the startup GCode block:

G28; home printer
M565 Z-1.0; set Z offset for autoleveling
G29; run the autoleveling probe of the bed

The M565 is the offset. If using the -1.0 mm is not right then go up (more negative) or down (less negative) until it looks correct.
Save that number for your prints

 

If your extrusion was NOT 100mm then you need to calibrate the extruder. I can point you to a video for that.

 

You can use any fixed point that you can easily find again once the marked part moves

 

OK, two things then...

(1)

Your startup GCode is not really correct for autoleveling on an R1 Beta/R1/R1+

The code I posted is correct (although you will need to experiment with the Z offset number to find what value works best for your machine). The Z offset is used to account for "slop" in the driver mechanism.

(2)
If telling it to extrude 100mm only actually moved it 75mm then you need to fix that 25% error is not acceptable for the extruder.

This is a video that talks about how to do it as well as discussion in the page on how to make the corrections.
Like Tom I usually just edit the firmware and reload it, but there are alternatives he offers if you want to test that you have it correct before editing the firmware.

https://toms3d.org/2014/04/06/3d-printing-guides-calibrating-your-extruder/

 

Well, Robo did not calibrate them from the factory and time and wear can tweak the values somewhat.
Also different filaments can behave differently, but that is usually a minor difference.

My gut feeling is that your actual problem is the lack of a Z offset and the nozzle is too close to the bed.

 

No, but it is in the startup GCode section of whichever slicer you use.
I mean you CAN do it in OctoPrint or Astro print, but doing it in the slicer is easier.

I found this reference which implies it is doable in AstroPrint, but I haven't used it in years...

https://forum.astroprint.com/t/add-custom-start-end-gcode-boxes-for-printer-profiles/2467