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CauldronDevelopmentLLC / CAMotics

Open-Source Simulation & Computer Aided Machining - A 3-axis CNC GCode simulator
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Simulate dwells (G4 P-) #412

Open ShamanTcler opened 10 months ago

ShamanTcler commented 10 months ago

This may be a "corner case" but I have written a spindle warm up that does not move any of the axis. I expected the code to run, and watch the RPMs to go up and down with time.... but I get nothing.

Code snippet:

(Safe block)
(G20 Units: inches)
(G90 Absolute distance mode)
(G17 work on in the X & Y plane)
(G80 cancel all active canned cycles)
(G40 turn off cutter compensation)
(G49 turn off tool length compensation)
G20 G90 G17 G80 G40 G49 

(Work offset: G54)
G54

(4500 RPM, turn on spindle CW)
S4500 M03 
(Dwell 60 seconds)
G04 X60
(Stop spindle)
M05

(end the program)
M30
jcoffland commented 10 months ago

CAMotics does not currently simulate dwells. Also, the correct code for a dwell is G04 P60.

ShamanTcler commented 10 months ago

Oh how I wish there was an ANSI standard for GCode. Seem some dialects of GCode support something like 

G04 X3.5 (dwell 3.5 seconds)

as far as you are concerned, do you support:

G04 P3.5 (dwell 3.5 seconds)                                  <- seems to be a Haas thing

or must it be:

G04 P3500 (dwell 3.5 seconds)
jcoffland commented 10 months ago

Only the middle one.

The GCode supported by CAMotics is described here: https://camotics.org/gcode.html There is a GCode standard, RS274/NGC. Not everyone follows it.