M8 in MDI not working (SOLVED)

[Martin Zarnay]

Hey Guys
I did setup coolant to OUT6, however, when I write M8 to MDI or post it by Gcode, coolant won't start...

Did someone had similar issue? What is missing?

Thank

[martyscncgarage]

First upgrade to 4.20.1, you are running 4.18
THEN:
Make sure COOLANT IS IN AUTO
Then enter M8 in MDI and THEN press Cycle Start.
When you put Coolant back into Auto in your video, you put M8 in the MDI but did not press cycle start.

Please retry.

[cnckeith]

hello.
what marty said,

and thanks for posting a report and a video!
the report shows you are running v4.18, please update to v4.20.1.
free support has ended for v4.18

[Martin Zarnay]

Hi guys
I've just updated it to v4.20.1. but still the same problem.
Auto coolant is on and in MDI M8 and nothing happens. In the video, I've pressed cycle start by shortkey Alt+S

Do I need to change some macro or parameter?

[cncsnw]

In your "mfunc8.mac" file, try changing "M94/8" to "M94/3", so that it matches the definition in your PLC program.

[Martin Zarnay]

It works! so simple change, how did you know that this would work? Or how did you find a solution ?