main.lyx

CNC 的开放码,EMC2 V2.2.8版

 Two M words from the same modal group may not appear on the same line.
\layout Standard

For all other legal letters, a line may have only one word beginning with
 that letter.
\layout Standard

If a parameter setting of the same parameter is repeated on a line, 
\begin_inset Quotes eld
\end_inset 


\family typewriter 
#3=15 #3=6
\family default 

\begin_inset Quotes erd
\end_inset 

, for example, only the last setting will take effect.
 It is silly, but not illegal, to set the same parameter twice on the same
 line.
\layout Standard

If more than one comment appears on a line, only the last one will be used;
 each of the other comments will be read and its format will be checked,
 but it will be ignored thereafter.
 It is expected that putting more than one comment on a line will be very
 rare.
 
\layout Section

Item order
\layout Standard

The three types of item whose order may vary on a line (as given at the
 beginning of this section) are word, parameter setting, and comment.
 Imagine that these three types of item are divided into three groups by
 type.
\layout Standard

The first group (the words) may be reordered in any way without changing
 the meaning of the line.
\layout Standard

If the second group (the parameter settings) is reordered, there will be
 no change in the meaning of the line unless the same parameter is set more
 than once.
 In this case, only the last setting of the parameter will take effect.
 For example, after the line 
\begin_inset Quotes eld
\end_inset 


\family typewriter 
#3=15 #3=6
\family default 

\begin_inset Quotes erd
\end_inset 

 has been interpreted, the value of parameter 3 will be 6.
 If the order is reversed to 
\begin_inset Quotes eld
\end_inset 


\family typewriter 
#3=6 #3=15
\family default 

\begin_inset Quotes erd
\end_inset 

 and the line is interpreted, the value of parameter 3 will be 15.
\layout Standard

If the third group (the comments) contains more than one comment and is
 reordered, only the last comment will be used.
\layout Standard

If each group is kept in order or reordered without changing the meaning
 of the line, then the three groups may be interleaved in any way without
 changing the meaning of the line.
 For example, the line 
\begin_inset Quotes eld
\end_inset 


\family typewriter 
g40 g1 #3=15 (foo) #4=-7.0
\family default 

\begin_inset Quotes erd
\end_inset 

 has five items and means exactly the same thing in any of the 120 possible
 orders (such as 
\begin_inset Quotes eld
\end_inset 


\family typewriter 
#4=-7.0 g1 #3=15 g40 (foo)
\family default 

\begin_inset Quotes erd
\end_inset 

) for the five items.
 
\layout Section

Commands and Machine Modes
\layout Standard

In RS274/NGC, many commands cause a machining center to change from one
 mode to another, and the mode stays active until some other command changes
 it implicitly or explicitly.
 Such commands are called 
\begin_inset Quotes eld
\end_inset 

modal
\begin_inset Quotes erd
\end_inset 

.
 For example, if coolant is turned on, it stays on until it is explicitly
 turned off.
 The G codes for motion are also modal.
 If a G1 (straight move) command is given on one line, for example, it will
 be executed again on the next line if one or more axis words is available
 on the line, unless an explicit command is given on that next line using
 the axis words or cancelling motion.
\layout Standard


\begin_inset Quotes eld
\end_inset 

Non-modal
\begin_inset Quotes erd
\end_inset 

 codes have effect only on the lines on which they occur.
 For example, G4 (dwell) is non-modal.
 
\layout Section

Modal Groups
\begin_inset LatexCommand \index{Modal Groups}

\end_inset 


\begin_inset LatexCommand \label{sec:Modal-Groups}

\end_inset 


\layout Standard

Modal commands are arranged in sets called 
\begin_inset Quotes eld
\end_inset 

modal groups
\begin_inset Quotes erd
\end_inset 

, and only one member of a modal group may be in force at any given time.
 In general, a modal group contains commands for which it is logically impossibl
e for two members to be in effect at the same time - like measure in inches
 vs.
 measure in millimeters.
 A machining center may be in many modes at the same time, with one mode
 from each modal group being in effect.
 The modal groups are shown in Table 
\begin_inset LatexCommand \ref{cap:Modal-Groups}

\end_inset 

.
\layout Standard


\begin_inset Float table
placement H
wide false
collapsed false

\layout Caption

Modal Groups
\begin_inset LatexCommand \label{cap:Modal-Groups}

\end_inset 


\layout Standard
\align center 

\begin_inset  Tabular
<lyxtabular version="3" rows="22" columns="2">
<features>
<column alignment="left" valignment="top" leftline="true" width="0">
<column alignment="left" valignment="top" leftline="true" rightline="true" width="0">
<row topline="true" bottomline="true">
<cell alignment="center" valignment="top" topline="true" leftline="true" usebox="none">
\begin_inset Text

\layout Standard

Modal Group Meaning
\end_inset 
</cell>
<cell alignment="center" valignment="top" topline="true" leftline="true" rightline="true" usebox="none">
\begin_inset Text

\layout Standard

Member Words
\end_inset 
</cell>
</row>
<row topline="true">
<cell alignment="center" valignment="top" topline="true" leftline="true" usebox="none">
\begin_inset Text

\layout Standard

Motion (
\begin_inset Quotes eld
\end_inset 

Group 1
\begin_inset Quotes erd
\end_inset 

)
\end_inset 
</cell>
<cell alignment="center" valignment="top" topline="true" leftline="true" rightline="true" usebox="none">
\begin_inset Text

\layout Standard

G0 G1 G2 G3 G33 G38.2 G73 G80 G81
\end_inset 
</cell>
</row>
<row>
<cell alignment="center" valignment="top" topline="true" leftline="true" usebox="none">
\begin_inset Text

\layout Standard

\end_inset 
</cell>
<cell alignment="center" valignment="top" topline="true" leftline="true" rightline="true" usebox="none">
\begin_inset Text

\layout Standard

G82 G83 G84 G85 G86 G87 G88 G89
\end_inset 
</cell>
</row>
<row topline="true">
<cell alignment="center" valignment="top" topline="true" leftline="true" usebox="none">
\begin_inset Text

\layout Standard

Plane selection
\end_inset 
</cell>
<cell alignment="center" valignment="top" topline="true" leftline="true" rightline="true" usebox="none">
\begin_inset Text

\layout Standard

G17, G18, G19
\end_inset 
</cell>
</row>
<row topline="true">
<cell alignment="center" valignment="top" topline="true" leftline="true" usebox="none">
\begin_inset Text

\layout Standard

Distance Mode
\end_inset 
</cell>
<cell alignment="center" valignment="top" topline="true" leftline="true" rightline="true" usebox="none">
\begin_inset Text

\layout Standard

G90, G91
\end_inset 
</cell>
</row>
<row topline="true">
<cell alignment="center" valignment="top" topline="true" leftline="true" usebox="none">
\begin_inset Text

\layout Standard

Feed Rate Mode
\end_inset 
</cell>
<cell alignment="center" valignment="top" topline="true" leftline="true" rightline="true" usebox="none">
\begin_inset Text

\layout Standard

G93, G94
\end_inset 
</cell>
</row>
<row topline="true">
<cell alignment="center" valignment="top" topline="true" leftline="true" usebox="none">
\begin_inset Text

\layout Standard

Units
\end_inset 
</cell>
<cell alignment="center" valignment="top" topline="true" leftline="true" rightline="true" usebox="none">
\begin_inset Text

\layout Standard

G20, G21
\end_inset 
</cell>
</row>
<row topline="true">
<cell alignment="center" valignment="top" topline="true" leftline="true" usebox="none">
\begin_inset Text

\layout Standard

Cutter Radius Compensation
\end_inset 
</cell>
<cell alignment="center" valignment="top" topline="true" leftline="true" rightline="true" usebox="none">
\begin_inset Text

\layout Standard

G40, G41, G42, G41.1, G42.1
\end_inset 
</cell>
</row>
<row topline="true">
<cell alignment="center" valignment="top" topline="true" leftline="true" usebox="none">
\begin_inset Text

\layout Standard

Tool Length Offset
\end_inset 
</cell>
<cell alignment="center" valignment="top" topline="true" leftline="true" rightline="true" usebox="none">
\begin_inset Text

\layout Standard

G43, G43.1, G49
\end_inset 
</cell>
</row>
<row topline="true">
<cell alignment="center" valignment="top" topline="true" leftline="true" usebox="none">
\begin_inset Text

\layout Standard

Return Mode in Canned Cycles
\end_inset 
</cell>
<cell alignment="center" valignment="top" topline="true" leftline="true" rightline="true" usebox="none">
\begin_inset Text

\layout Standard

G98, G99
\end_inset 
</cell>
</row>
<row topline="true">
<cell alignment="center" valignment="top" topline="true" leftline="true" usebox="none">
\begin_inset Text

\layout Standard

Coordinate System Selection
\end_inset 
</cell>
<cell alignment="center" valignment="top" topline="true" leftline="true" rightline="true" usebox="none">
\begin_inset Text

\layout Standard

G54, G55, G56, G57, G58
\end_inset 
</cell>
</row>
<row>
<cell alignment="center" valignment="top" topline="true" leftline="true" usebox="none">
\begin_inset Text

\layout Standard

\end_inset 
</cell>
<cell alignment="center" valignment="top" topline="true" leftline="true" rightline="true" usebox="none">
\begin_inset Text

\layout Standard

G59, G59.1, G59.2, G59.3
\end_inset 
</cell>
</row>
<row topline="true">
<cell alignment="center" valignment="top" topline="true" leftline="true" usebox="none">
\begin_inset Text

\layout Standard

Stopping
\end_inset 
</cell>
<cell alignment="center" valignment="top" topline="true" leftline="true" rightline="true" usebox="none">
\begin_inset Text

\layout Standard

M0, M1, M2, M30, M60
\end_inset 
</cell>
</row>
<row topline="true">
<cell alignment="center" valignment="top" topline="true" leftline="true" usebox="none">
\begin_inset Text

\layout Standard

Tool Change
\end_inset 
</cell>
<cell alignment="center" valignment="top" topline="true" leftline="true" rightline="true" usebox="none">
\begin_inset Text

\layout Standard

M6 Tn
\end_inset 
</cell>
</row>
<row topline="true">
<cell alignment="center" valignment="top" topline="true" leftline="true" usebox="none">
\begin_inset Text

\layout Standard

Spindle Turning
\end_inset 
</cell>
<cell alignment="center" valignment="top" topline="true" leftline="true" rightline="true" usebox="none">
\begin_inset Text

\layout Standard

M3, M4, M5
\end_inset 
</cell>
</row>
<row topline="true">
<cell alignment="center" valignment="top" topline="true" leftline="true" usebox="none">
\begin_inset Text

\layout Standard

Coolant
\end_inset 
</cell>
<cell alignment="center" valignment="top" topline="true" leftline="true" rightline="true" usebox="none">
\begin_inset Text

\layout Standard

M7, M8, M9.
 Special case:
\end_inset 
</cell>
</row>
<row>
<cell alignment="center" valignment="top" topline="true" leftline="true" usebox="none">
\begin_inset Text

\layout Standard

\end_inset 
</cell>
<cell alignment="center" valignment="top" topline="true" leftline="true" rightline="true" usebox="none">
\begin_inset Text

\layout Standard

M7 and M8 may be active at the same time
\end_inset 
</cell>
</row>
<row topline="true">
<cell alignment="center" valignment="top" topline="true" leftline="true" usebox="none">
\begin_inset Text

\layout Standard

Override Switches
\end_inset 
</cell>
<cell alignment="center" valignment="top" topline="true" leftline="true" rightline="true" usebox="none">
\begin_inset Text

\layout Standard

M48, M49
\end_inset 
</cell>
</row>
<row topline="true">
<cell alignment="center" valignment="top" topline="true" leftline="true" usebox="none">
\begin_inset Text

\layout Standard

Flow Control
\end_inset 
</cell>
<cell alignment="center" valignment="top" topline="true" leftline="true" rightline="true" usebox="none">
\begin_inset Text

\layout Standard

O-
\end_inset 
</cell>
</row>
<row topline="true">
<cell alignment="center" valignment="top" topline="true" leftline="true" usebox="none">
\begin_inset Text

\layout Standard

Non-modal codes (
\begin_inset Quotes eld
\end_inset 

Group 0
\begin_inset Quotes erd
\end_inset 

)
\end_inset 
</cell>
<cell alignment="center" valignment="top" topline="true" leftline="true" rightline="true" usebox="none">
\begin_inset Text

\layout Standard

G4, G10 G28, G30, G53
\end_inset 
</cell>
</row>
<row>
<cell alignment="center" valignment="top" topline="true" leftline="true" usebox="none">
\begin_inset Text

\layout Standard

\end_inset 
</cell>
<cell alignment="center" valignment="top" topline="true" leftline="true" rightline="true" usebox="none">
\begin_inset Text

\layout Standard

G92, G92.1, G92.2, G92.3
\end_inset 
</cell>
</row>
<row bottomline="true">
<cell alignment="center" valignment="top" topline="true" leftline="true" usebox="none">
\begin_inset Text

\layout Standard

\end_inset 
</cell>
<cell alignment="center" valignment="top" topline="true" leftline="true" rightline="true" usebox="none">
\begin_inset Text

\layout Standard

M100 to M199
\end_inset 
</cell>
</row>
</lyxtabular>

\end_inset 


\end_inset 


\layout Standard

For several modal groups, when a machining center is ready to accept commands,
 one member of the group must be in effect.
 There are default settings for these modal groups.
 When the machining center is turned on or otherwise re-initialized, the
 default values are automatically in effect.
\layout Standard

Group 1, the first group on the table, is a group of G codes for motion.
 One of these is always in effect.
 That one is called the current motion mode.
\layout Standard

It is an error to put a G-code from group 1 and a G-code from group 0 on