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Its quite possible to get linuxcnc and Ethercat working with secure boot. The instructions you followed have a spoiler to open  explaining how to do it. The method came from the ethercat guys and I have tested it as working.

@Rüdiger
May this be a result of the missing (?, the screenshot is hard to read) Q parameter? From the   readme :

Important Runtime NotesWhen using the S-curve trajectory planner, always use the 

G64 P[x] Q[x]

 command combination. If 

Q[x]

 is not specified, the interpreter may:

1. Remove or filter out small segments.
2. Convert arc segments into line segments.

A standard input should look like this:

G64 P0.01 Q0.0

You can do it! It will depend on you GUI. some may even have the ability to program a slider. Have a browse in the linuxcnc docs as its all documented
 

joshualee777 wrote:

Hello, I reset the device to factory defaults as you advised, but the "Amplifier Fault" error still persists. Is it because the DC setting is not set correctly? I'm wondering if you have any other advice.

The only Amplifier faults I have seen with steppers is when the drive or the motor overheats (Non-ethercat).
With Ethercat it could be a following error reported by the drive throwing this. There is a Fault code for the ETC60 so bring that out in your xml file. It can take  a bit to decode as it is a bitmapped field. Display the field in halshow. Convert it to hex or binary which Google will do for you and refer to the docs.

Hello Andy,

Thanks again for your support.
Inputting "halcmd setp stepgen.4.velocity-cmd 40" from the terminal, while a session of LinuxCNC is cutting metal, works well and is so easy to do.
Now I can adjust (and optimise) the MQL flow rate on the fly, It also allows me to easily use different flow rates for both neat synthetic fluids and also water soluble coolant.

It would be cool to control the flow rate from a virtual slider pot on the AXIS virtual control panel, but I suspect that would be well above my 'pay scale'

Thanks again

Mike