Hi Andy,
Pretty straight forward. 
Original Raspberry Pi4 2.8.0 Linux CNC distribution with MESA 7i92H.  AXIS 
screen reporting 2.8.0
1. Power system up.
2. Home all.
3. Move axis so knee and XY are in mid range and touch of each axis so 
co-ordinates  are 0,0,0.
4. Click on Spindle forward and increment to 500 RPM.
5. Change to MDO screen
6. Enter in G01 X1.0 F4 S1000
7. Spindle stops.  X moves to 1.0.

Enter instead G01 X1.0 F4 M3 S1000 and spindle doesn't stop but accelerates up 
to 1000 RPM.

BTW, using a PC and Axis 2.7.14 (still with the MESA) it exhibits the same 
issue.

So it looks like although the AXIS Spindle ON should also set the M3 it doesn't?

John

> -----Original Message-----
> From: andy pugh [mailto:bodge...@gmail.com]
> Sent: December-15-20 8:14 AM
> To: Enhanced Machine Controller (EMC)
> Subject: [Emc-users] Spindle + MDI (Was: I wonder...)
> 
> On Fri, 11 Dec 2020 at 23:53, John Dammeyer <jo...@autoartisans.com> wrote:
> 
> > It�s the little things tha trip me up.  Like setting the spindle to 1000 
> > RPM.  Doing some cutting and > then sending an MDI command
> like G01 X0.0 S500. And the spindle stopped.  Seems once
> > issued from the MDI it doesn't know that there was an M3 kind of there from 
> > the user interface
> > speed setting.  So it stopped.  Had to hit estop before the cutter hit the 
> > work.
> 
> Can you say how to reproduce this, step by step? I tried and failed.
> Also, which GUI?
> 
> --
> atp
> "A motorcycle is a bicycle with a pandemonium attachment and is
> designed for the especial use of mechanical geniuses, daredevils and
> lunatics."
> � George Fitch, Atlanta Constitution Newspaper, 1912
> 
> 
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