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I have a question about the spindle speed control.
This is a lathe configuration. The previous owner has the chuck set as "spindle" so I'll be using spindle to describe it going forward. I hope this alleviates some confusion.

Anywho...
If I tap forward, the spindle the scale whitens and shows a green bar on the scale indicating RPM on the scale. I can tap +/- to override the spindle speed +/- 50% as one would expect.

However, if I click reverse the scale switches to a negative scale but it stays grayed out and the spindle shoots up to about 2000 RPMs with no green bar. Also the spindle speed cannot be overridden.

I don't believe this is an issue with the VFD I suspect it's some configuration issue. Correct me if I'm wrong.

Can someone shed a light on this? 

Thanks in advance.

Hello Bro's;
I m trying to control (read/write ) data from MR-JE mistubishi servo drive using the 7I76EU mesa board, using PKTUART, i could reveive data from mitsubishi HMI but when i tried reading the data from the servo drive, it seems like the connection happened but there is not data reed and when i run the linuxcnc it take time to open not like usual time and two type of error appear as shown on the pic bellow. you will find also the .HAL configuration file and the C file where i put the adresse i wanted to read 
 

whew yes the init light is blinking. I will look into what I need to do to un screw up my card and hopefully get the correct outcome this time lol

already a good starting point

github.com/multigcs/esitool

I was reading about g-code remapping again just now. M3 isn't remappable, sadly, but I found that there's an available remap for M6 ("ignore_m6") which would avoid the bug that started this thread. So that's interesting, but not long term, since I might actually want to implement tool changes.

I also found that, while M3 isn't remappable, the S comand is. So there might be a way to use that.

G1 Z0 to fool at-speed? Devious! I'll give that a try. M66 is an interesting idea too. I'll think about that.

Right now my solution is all hidden behind a perfectly normal looking M3, which is kind of nice. (Well, unless an M6 happens too quickly after the M3, as I've discovered....)

But first I have to do "just one more test carve" on a piece I want to take on vacation later this week...