G4 Dwell parameters

[mmcp42]

Hello Striling
Thanks for that

sounds like a definitive source rather than the "I have a mate whose friend said that he read somewhere..."

seconds it is then

(might still have a configuration option for mS - and an Mcode to flip between the two)

is there a standard way of using unused Mcodes - or do you just get on with it?
for example I have already implemented:

M111 to set debug level
M226 pause until user hits Go button
M254 program start (initialise everything)
M255 request current command completion status

[stirling]

is there a standard way of using unused Mcodes - or do you just get on with it?

The simple answer is - I don't know. The problem with standards is that there are so many of them. I've referred to NIST - but this doesn't mean it's the only one (googlify gcode standards!) - a lot of implementations for example take the view - if it's good enough for Fanuc - it's good enough for me. Certainly some m codes are "standard" in the sense that they mean the same thing in "most" implementations. BUT as far as I'm aware there is no "standard" for using the "unused" codes.

[mmcp42]

I'll just keep hijacking codes until I see another implementation/definition that uses them!

[M250cnc]

I'll just keep hijacking codes until I see another implementation/definition that uses them!

What exactly do you need the dwell for as sometimes there are better ways of doing things.

Example, i have a 4 second delay after every toolchange where coolant needs to come on so allows the coolant to flow before the tool starts cutting.

Phil

[mmcp42]

What exactly do you need the dwell for as sometimes there are better ways of doing things.

Example, i have a 4 second delay after every toolchange where coolant needs to come on so allows the coolant to flow before the tool starts cutting.

Phil

well there are two answers:
a) I want to implement a gcode interpreter "properly" so I need to know what the G4 syntax means
b) I am using Eagle to lay out PCBs; the gcode converter spits out a (G4 P3) delay after starting the spindle
clearly that needs to be 3 seconds not 3 mSeconds!

make sense?

[M250cnc]

well there are two answers:
a) I want to implement a gcode interpreter "properly" so I need to know what the G4 syntax means
b) I am using Eagle to lay out PCBs; the gcode converter spits out a (G4 P3) delay after starting the spindle
clearly that needs to be 3 seconds not 3 mSeconds!

make sense?

Yes, so you need to configure the control so that P3 is 3 seconds and not 3 milli seconds.

Phil

[mmcp42]

indeed - already done it!