Ethercat - newbie guidelines

Homing from the wrong side of the switch would result in what you describe, see lover part of the drawing.
Just a stab in the dark.

tommylight wrote:

Homing from the wrong side of the switch would result in what you describe, see lover part of the drawing.
Just a stab in the dark.

Yes its possible the HOME_LATCH_VELOCITY has an incorrect sign. I did think of that.  But this is all happening external to Linuxcnc. Eg Linuxcnc is not commanding the motor to move, the drive is.

but maybe your input logic on the drive is inverse, or them are sink inputs.
hold down the switch, start the homing, release the switch and push it again.
I'm shure your drive then has done the excepted homing.

normaly you can set inverse of the input with an register.

db1981 wrote:

but maybe your input logic on the drive is inverse, or them are sink inputs.
hold down the switch, start the homing, release the switch and push it again.
I'm shure your drive then has done the excepted homing.

normaly you can set inverse of the input with an register.

Worth a try! 0x2008 sets input port polarity on this drive. (Normally Open or Normally Closed)

I never said anything about LinuxCNC.
What you describe exactly matches the B section of the attached picture, so the drive is doing what is told but from the wrong side so it stops.

Well I went back and checked what limit switches I had bought and they were normally open (NO). I checked the settings and  NO polarity is a 1. Bit 4 (where the first bit is 0), is the one applicable for the home switch.  The default setting in the register is 0xF0 so the input was set to NO.

I played around with the polarity and ended up with an utter mess. so reverted back to the working config using the component above.

So I'm going to sit this out until I get some ball screws mounted and the drives off my desk and into a machine. That may take a while.

Thanks everyone for your support.  I will report back in due course.