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The R value is the standby temperature in oC that will be used for the tool, and the S value is its
operating temperature. If you don't want the tool to be at a different temperature when not in use,
set both values the same. See the T code (select tool) .
The
NIST G-code standard
mentions an additional L parameter, which is ignored.
This command is
subject to
discussion.
G20: Set Units to Inches
Example: G20
Units from now on are in inches.
G21: Set Units to Millimeters
Example: G21
Units from now on are in millimeters. (This is the RepRap default.)
G90: Set to Absolute Positioning
Example: G90
All coordinates from now on are absolute relative to the origin of the machine. (This is the
RepRap default.)
G91: Set to Relative Positioning
Example: G91
All coordinates from now on are relative to the last position
G92: Set Position
Example: G92 X10 E90
Allows programming of absolute zero point, by resetting the current position to the values
specified. This would set the machine's X coordinate to 10, and the extrude coordinate to 90. No
physical motion will occur.
A G92 without coordinates will reset all axes to zero.
Immediate M and T commands
M0: Stop
Example: M0
The RepRap machine finishes any moves left in its buffer, then shuts down. All motors and
heaters are turned off. It can be started again by pressing the reset button on the master
microcontroller. See also M1, M112.
M1: Sleep
Example: M1
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