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Printer 101

Revision as of 21:16, 18 August 2017 by Techmav (talk | contribs)

Basic Information, Nomenclature, and Assumptions

  • For the purposes of documentation, it is assumed that the origin (0,0,0) is at the front left of the print bed for Cartesian and CoreXY Printers. Typically, it is either front left, or rear right. If it is rear right, you can just picture turning the printer 180 degrees and that will put it in the proper orientation.
  • On a Delta printer, origin is in the center of the bed. Home position is at the top, near the endstops.
  • In OctoPrint, on the Control tab, there are a set of arrows that control the print head. These move the print head as if the print bed were stationary. On the X/Y section, the Up Arrow will move the print head away from the origin, towards the back of the printer. Right Arrow will move the print head to the right, away from origin. In the Z section, the Up Arrow will move the head up away from the print bed.
  • End stops: Minimum is at the 0 of that axis. If you have an end stop at the maximum end of the axis, you need to set an offset in your Redeem local.cfg so the system knows how far to back off from the end stop to reach 0.
offset_y = 0.15  #Remember, these measurements are in meters
  • Configuration file precedence: The system will check for a local.cfg file first and check if the value it needs is in that file. If it doesn't find it there, it will check for a printer.cfg file. Failing that, it will check the default.cfg file. It is strongly recommended that you make any needed changes in the appropriate local.cfg file, as that file does not get overwritten when the software is upgraded. Any changes made to printer.cfg or default.cfg may be lost when the software is updated. This applies to both Redeem and Toggle
  • Configuration file format: You do need the appropriate section headers (in brackets) when you add config options.
axis_config = 2
travel_x = 0.35
travel_y = 0.25
travel_z = 0.4