Final Calibrations

[last updated: 2021-06-29]
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Self-test:
(link to:) Prusa Self-Test instructions
- This is the first thing to do after assembly and pre-flight checks (pintle height adjustment) are done.
- After some dinking around, got it to pass self-check (first attempt failed because I had the printer too close to the wall and the heatbed cord pushed against the wall and Y-axis calibration failed).
XYZ Calibration:

A question on what type of sheet I have, whether "smooth PEI" or "powder coated." As I recall I ordered smooth PEI because there was extra lead-time for powder coated. It's not relevant to the procedure, just want to completely document my process.

Mount filament spool onto printer.
Clean the bed.
(go to:) Load filament:
Initiate the first layer calibration:
menu > Calibration > First Layer
select "Yes" to confirm proper filament type is loaded
bed pre-heat will start, then printing will start
When the print starts, a new menu will appear: Adjusting Z
turn knob CCW (increase Z-minus adjust - ie. make it more negative) to get more "squish" on the bed
See instructions if you need to lower it below -2.000mm
if it doesn't work, that is, the layer is not squished correctly, repeat First layer calibration:

press & hold knob. rotate knob CW to raise z to have clear access to bed
let bed cool, then clean off deposited filament, re-clean with IPA (or whatever cleaner/solvent depending on filament type) if necessary
menu > Preheat > select filament type being loaded
when ready:
menu > Calibration > First layer cal.
is [proper filament] loaded? Yes
when heating is done, First layer cal. proceeds
when calibration is done and screen says Adjusting Z,
turn knob CCW to increase Z-minus distance (increasing "squish")
when done, inspect for proper squish. If still not enough, repeat

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