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boyzo wrote:
Pressing "ESC" will stop the preview, which is probably a bit easier than killing the process.

You ought to be able to use a "magic comment" to stop the preview at a chosen location.

(Mill 5 diagonal shapes)
o100 do
G91 (Incremental mode)
o103 repeat [5]
M66 P0 L3 Q2
G0 X1 Y1 (diagonal move to next position)
o103 endrepeat
G90 (Absolute mode)
(AXIS,stop)
o100 while [1 EQ 1]
M30

You might try turning off the Axis preview which will try and draw forever the never ending loop...

John

Hello,

Thank you all for help with this. I use (AXIS,stop) to stop preview.

Is this request (I mean to repeat execution of single program) worth thinking about solving it on the external level not in the CNC program?

Regards

I would assume the only reason you need to repeat a program is if your changing parts out or have a bar feeder and both of those should be controlled externally from the g code file. When you run out of material you want to stop right? You don't want to start till the new blank or the bar feeder is done right?

Or is this a totally different application? More details on what your trying to do would help.

John

boyzo wrote:It is impossible in the general case to determine if a loop will ever end:
en.wikipedia.org/wiki/Halting_problem
So, the question should then be if the Axis preview should only iterate through a loop a finite number of times. The question then is how many times, and also if program lines after the loop should be previewed.

I don't think there is any good reason to use an infinite loop. I assume that your machine is not a conventional XYZ machine?

BigJohnT wrote:
Yes, this is what I want. CNC program will wait until new part is ready on each cycle.

I did this in ladder program where I use halui pins:
halui.machine.is-on
halui.program.is-idle
halui.program.optional-stop.is-on ... to simulate CycleRun
halui.program.run.

It works. I want to use also halui.mode.is-auto, but it goes off with M30. Is it possible to keep this sygnal on?

I attached simple ladder I use for testing.