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thanks!
this is what i assumed but did not know where to start. will try shortly.

im just poking this as i do other work so its taking a while

Ooops, you probably need the Ethercat xml too

Well now you need to write your hal file 
Once you have motion, just start with one feature at  time eg. estop, then homing, coolant/mist, then spindle.
I normally work in axis until I have the basics worked out before going to another GUI.
Here is my Ethercat mill config. Main thing here is there are some belts on the spindle so I have  a component to scale the speed correctly.
It uses standard Linuxcnc homing with home sensors on all axes
 

Thank you i didn't know witch direction i would go.. but now i have a idear

Hi I can't get the servo drive from SAFEOP to OP mode due "EtherCAT ERROR 0-0: AL status message 0x001B: "Sync manager watchdog""

cnc@raspberrypi:~$ sudo ethercat state INIT
cnc@raspberrypi:~$ sudo ethercat state PREOP
cnc@raspberrypi:~$ sudo ethercat state SAFEOP
cnc@raspberrypi:~$ sudo ethercat state OP
cnc@raspberrypi:~$ sudo ethercat slaves -v
=== Master 0, Slave 0 ===
Device: Main
State: SAFEOP
Flag: +
Identity:
  Vendor Id:       0x00400000
  Product code:    0x00000760
  Revision number: 0x00005608
  Serial number:   0x00000000
DL information:
  FMMU bit operation: no
  Distributed clocks: yes, 64 bit
  DC system time transmission delay: 0 ns
Port  Type  Link  Loop    Signal  NextSlave  RxTime [ns]  Diff [ns]   NextDc [ns]
   0  MII   up    open    yes             -   3079639242           0           0
   1  MII   down  closed  no              -            -           -           -
   2  N/A   down  closed  no              -            -           -           -
   3  N/A   down  closed  no              -            -           -           -
Mailboxes:
  Bootstrap RX: 0x0000/0, TX: 0x0000/0
  Standard  RX: 0x1000/256, TX: 0x1400/256
  Supported protocols: CoE, FoE
General:
  Group: AC Servo Driver
  Image name: 
  Order number: ANCTL AS760N Servo Driver
  Device name: AS760N_sAxis_V0.10
  CoE details:
    Enable SDO: yes
    Enable SDO Info: no
    Enable PDO Assign: yes
    Enable PDO Configuration: yes
    Enable Upload at startup: no
    Enable SDO complete access: no
  Flags:
    Enable SafeOp: no
    Enable notLRW: no
  Current consumption: 0 mA


cnc@raspberrypi:~$ dmesg | tail -20
[ 9664.358899] EtherCAT ERROR 0-0: SDO download 0x1C32:01 (2 bytes) aborted.
[ 9664.358905] EtherCAT ERROR 0-0: SDO abort message 0x08000022: "Data cannot be transferred or stored to the application because of the present device state".
[ 9664.358907] EtherCAT ERROR 0-0: Failed to process SDO request.
[ 9664.402879] EtherCAT ERROR 0-0: SDO download 0x1C33:01 (2 bytes) aborted.
[ 9664.402886] EtherCAT ERROR 0-0: SDO abort message 0x08000022: "Data cannot be transferred or stored to the application because of the present device state".
[ 9664.402889] EtherCAT ERROR 0-0: Failed to process SDO request.
[ 9760.555095] EtherCAT ERROR 0-0: SDO download 0x1C12:01 (2 bytes) aborted.
[ 9760.555100] EtherCAT ERROR 0-0: SDO abort message 0x08000022: "Data cannot be transferred or stored to the application because of the present device state".
[ 9760.555102] EtherCAT ERROR 0-0: Failed to process SDO request.
[ 9760.595087] EtherCAT ERROR 0-0: SDO download 0x1C13:01 (2 bytes) aborted.
[ 9760.595094] EtherCAT ERROR 0-0: SDO abort message 0x08000022: "Data cannot be transferred or stored to the application because of the present device state".
[ 9760.595097] EtherCAT ERROR 0-0: Failed to process SDO request.
[ 9865.955283] EtherCAT 0: Slave states on main device: INIT.
[ 9872.951304] EtherCAT WARNING 0-0: Aborting SDO request, slave is in INIT.
[ 9872.967344] EtherCAT WARNING 0-0: Aborting SDO request, slave is in INIT.
[13760.889546] EtherCAT 0: Slave states on main device: PREOP.
[13765.925570] EtherCAT 0: Slave states on main device: SAFEOP.
[13782.411825] EtherCAT ERROR 0-0: Failed to set OP state, slave refused state change (SAFEOP + ERROR).
[13782.411909] EtherCAT ERROR 0-0: AL status message 0x001B: "Sync manager watchdog".
[13782.412843] EtherCAT 0-0: Acknowledged state SAFEOP

I have just purchased a amazon bob. It looks similar to the one you mentioned. As far as I understand most of them have the same pins on the db25 port.

For just a straight cut-off operation I think this is doable in hal.
(the unroll is done in hal, then the cut-off is just at the beginning of the Gcode)

If you want diagonal or other fancier cuts that gets trickier. I also expect that
the unroll operation would be less accurate than normal joint motions and
possibly unidirectional. It also needs to rehome when done.

 

It has been done (using interpolated position) but depends on very good
speed control of the spindle vs load, since you are essentially "flying blind"
for 1 whole turn.

With the software encoder you would connect the external index pin
to both 'A' and 'index' of the encoder component and set the encoder
component to counter mode.

A small improvement to deal with just one sensor would be to have a 1/2 disk
so you can get 2 counts per turn.

tommylight wrote:

Keep us updated, if possible, and take care.
 

+1

An index pulse alone is not enough you also need a pulse train signal like an encoder channel to track the spindle velocity:
linuxcnc.org/docs/html/examples/spindle.html

Can roller with 0-10v inverter be V axis for example and unrolling handled in gcode?
Any better appproach?

Moved the post with the second batch of images in here.

Yes, you don't need the hal encoder comp at all and unless you have a base thread
(not practical with an Ethernet connected device), the hal component will be quite slow.

Oh dear..My poor old brain.
So, the MPG is connected to the correct pins, but the input designation I should be using is perhaps hm2_7i92.0.7i73.0.2.enc0.count to get access to the high speed values?

So take the encoder count stuff out of the hal thread and instead couple
net mpg-out ilowpass.0.in <= hm2_7i92.0.7i73.0.2.enc0.count

I doubt this is all that helpful, but I did write a custom VFD module for a Commander SK over RS485/modbus, about a dozen years ago (for LinuxCNC 2.6 .. ancient stuff).  Here is the code, in case there's any value for you:

github.com/tangentaudio/cmdrsk_vfd

I'm going to revamp that machine soon and I most likely would choose one of the methods you're thinking about rather than stick with a custom component.