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3D Printing

Calibrating Z axis

https://3dprint.wiki/reprap/anet/a8/improvement/autobedleveling

Use Pronterface software

  1. Heat your printer up to your printing temperature and allow a few minutes for it to expand and settle Reset the existing Z-offset to zero

    M851 Z0

  2. Home all axes

    G28

  3. Move the nozzle to the middle of the bed

    G1 X110 Y110

    (if your bed is 220 x 220)

  4. Turn off the software endstops with

    M211 S0

  5. Move the nozzle down so it is just gripping a piece of standard printer paper Set the Z-offset to the displayed value. E.g. if the printer displays a Z-Value of -1.23 enter

    M851 Z-1.23

  6. Store it to the EEPROM

    M500

  7. Important notice! Enable the endstops again with

    M211 S1

    or the printer head will collide with the bed on the next G28 command

GCode to display location

m114

Hole offsets for screws

M2 = 2mm OD of screw. M3 = 3mm OD of screw.

If you want to make it smaller use these sizes and tap. Make sure there is 3 or 4 layers in wall https://www.boltdepot.com/fastener-information/Metric-Tap-Drill-Size.aspx

However if you want to make it bigger use the following fits:

Desired Fit     Clearance Gap (mm)
Press Fit 	    Line to Line
Tight Fit 	    0.127
Normal Fit 	    0.254
Loose Fit 	    0.508