M-Series Operator’s Manual 4/9/15
G61 - Modal Decelerate and Stop
(formerly known as Exact Stop Mode)
G61 activates Decelerate and Stop mode for every block processed. This forces motion to
decelerate to a stop and invokes a brief dwell (1/100 seconds) at the end of each block
(equivalent to G9 in each block). G61 is modal and remains in effect until it is canceled with
G64. Note that G61 also turns off Smoothing mode.
Example:
G0 X0 Y0 ; move to origin
G61 X2 ; move and decelerate and stop at X2
X4 ; move and decelerate and stop at X4
X5 ; move and decelerate and stop at X5
G64
– Smoothing Mode Selection / Cancel Modal Decel and Stop
G64 has multiple formats with different functionality. Invoking G64 with either an ON or OFF parameter sets the
Smoothing mode to on or off, and also cancels Modal Decelerate and Stop (G61). Invoking G64 without either the
ON or OFF parameter simply cancels Modal Decelerate and Stop. Note that all forms of G64 will cancel Modal
Decelerate and Stop (Cancel G61).
G64 Format Function
G64
Simply cancel Modal Decelerate and Stop (Cancel G61).
This does not affect Smoothing mode.
G64 ON
Turn on Smoothing mode using the current parameter settings (in P221-
P228, P230, and P231). The effect of this command is temporary as it is
active only until the next G64 ON/OFF command or until the end of job.
Upon the start of the next job, the the inital on/off state of Smoothing will
once again be determined by parameter 220. This command does not
modify any parameters. (This also cancels G61.)
G64 OFF
Turn off Smoothing mode. The effect of this command is temporary as it
is active only until the next G64 ON/OFF command or until the end of job.
Upon the start of the next job, the the inital on/off state of Smoothing will
once again be determined by parameter 220. This command does not
modify any parameters. (This also cancels G61.)
G64 ON "preset label"
G64 ON P__
(where P__ is P1-P99)
Turn on and activate Smoothing mode using the specified “preset label” or
preset number (P1-P99). (See Chapter 14 for further information on
setting up Smoothing Presets.) Note that “preset label” is not case
sensitive. You can use the preset number to specify those presets that
don’t have a “preset label”. These commands have a lasting effect beyond
the end of the current job because they actually copy the specified
Smoothing preset settings into the current parameters (P221-P228, P230,
and P231) and sets P220 to 1. (This also cancels G61.)
G64 ON P0
G64 OFF P0
Turn off and deactivate Smoothing mode. Both forms of this command do
the same thing. The P0 refers to “Exact Stop” mode. This command sets
P220 to 0, and thus has a lasting effect beyond the end of the current job.
(This also cancels G61.)
Examples:
G64 ;cancel Modal Decelerate and Stop
G64 ON ;turn on modal Smoothing mode
G64 OFF ;turn off modal Smoothing mode
G64 ON P2 ;Activate Smoothing Preset #2 by number
G64 ON "contouring mill" ;Activate "Contouring Mill" Preset by label
G64 ON P0 ;Deactivate Smoothing. Activate Exact Stop mode.
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