I forgot to mention, VFDs radiate interference out of both incoming and outgoing power wires. Outgoing is by far the worst, but incoming side also quite bad. Thanks for the BOB picture. I circled the power wires going past BOB. Those certainly radiate interference when the VFD is running, everything all the way back to the breaker panel and beyond is affected to a certain extent. I prefer to keep all that AC wiring a minimum of 12" from the BOB.

How long is your parallel port cable? Is it shielded? The longer it is, the more interference it can collect. If it is shielded then I would think no worry.

Best you make sure that your drive is indeed an Ethercat drive first of all.

If so, I think you can try this small example.
github.com/dbraun1981/hal-cia402/tree/main/example
I wouldn't be surprised if it works.
Some drives need some additional settings, if you are lucky yours will run directly.
Anyway, this little example shows the structure of how to connect an Ethercat servo drive to LinuxCNC.

The encoder position is used internally in the drive for feedback.
The encoder position is feed back to linuxcnc also, see the example hal file.
After you get it going, you should tune the drive's PID parameters,
just like is needed for every servo drive.



 

Just a few thoughts.

If for professional production, take it with a lot of caution. I only toyed around for hobby use.

300 rpm is fairly quick for a rotary axis.
How fast can the hob run during the cut?
The machine can tilt the spindle, can it?
You do not really need the spindle position, under the condition that the spindle is brought up to speed, before you start the cut and not stopped before it is finished.
A simple incremental encoder on the spindle probably works fine. More than 100 counts per rev and it might already work.
I run the rotary open loop, as long as the motor can keep up with torque and speed, encoder on the rotary is "nice to have", but not essential.

You can even get away with a semi electronic gearing for straight gears this will get rid of the computer altogether.


There is (was) an instruction on the Linux Wiki where the gear hobbing was explained.
wiki.linuxcnc.org/cgi-bin/wiki.pl?Hobbing

The spindle syncronisation is independent from x-y-z axis, as long as you do not. a) want to cut helical gears b) want to run hob shifting c) want to try hobbing wormgears with tangential hobbing.

Thank you so much, Mr.Hakan.

I installed "go" package and then everything seems to be successful.

I appreciate your kindness.

I will try to connec YASKAWA Servo tomorrow.

I have thought of it but i havent the skills yet to build a new driver ..
the drive is
cdn.delta-emea.com/cs/download/file/4641...2_UM_EN_20201209.pdf

Ok is CSP mode only motor encoder ? i am not sure at all now..

when i started the build i planned to use
6.2.1 Position Command in PT Mode
Becurse of the feedback from the scale

you have to adjust the resolution over SDOs during start up and then to reduce it over float factor in the SMs ... if you are scaling 1 / something big it will just create you crazy numbers then ... 

share config at first place ... then we can help you well

Okay it is possible to pre-process the g-code manually like this:

1) Launch an instance of Monokrom (sim)
2) Navigate to the Monokrom Simulation Config Directory. Open terminal there and set environment variables

3) Call preprocessor in terminal with the input.ngc processed by the SheetCam PlasmaC Post

The output is the processed.ngc. The first few lines are below:

This is why I get the error in input.ngc line 1: Unknown word where unary operation could be. The first line contains "Filter name: from-ini func: <function from_ini at 0x7ff0a03176a0>".

    

 It seems user fdarling has got yaskawa drives working with ethercat and lcec based on this response on the original sittner/linuxcnc-ethercat repo.

github.com/sittner/linuxcnc-ethercat/issues/121

Based on the original suggestions in github.com/nylon7/Igh-Ethercat-master/bl...ples/user/main_yas.c, I also have gotten yaskawa drives to work with linuxcnc without using lcec.
I have attached the program to this mail. 
The next step is to make a separate yaskawa driver in lcec like delta ASDA or omron drives to service yaskawa sigma7 drives.

-automata 

Hello all

I installed a 0-10v signal from my MESA 7i77 board to the vfd to control rpm and my XHC-W04B-6 pendant will enable the spindle but wont tell the spindle to turn at default spindle speed set in the ini file .  Any help would be appreciated.

Regards 
James 

Hello,
I already have a Maho MH500 and a cycloidal lathe retrofitted to LinuxCNC, so I do have some practical experience with LinuxCNC retrofits.Now a colleague has approached me with the following idea:
He wants to build a CNC rotary table for his Maho MH600 in order to hob gears (gear hobbing).The idea is a rotary table with an “electronic gearbox”, synchronized to the machine spindle of the Maho.Key requirements:

• Maximum rotary table speed: ~300 rpm
• Servo or stepper drive with a gearbox, approx. 1:3
• The control should run fully standalone
• Only spindle position and spindle speed are taken from the spindle encoder
• The rotary table is synchronized to the spindle via electronic gearing

Questions / design considerations:

• What is the best choice of encoder for this application?
  Probably an absolute encoder? or better incremental for a better dynamic?
• Servo motor will most likely be NEMA 42 size
• Encoder setup ideas:
  • Incremental encoder on the spindle
  • Encoder directly on the rotary table
  • Possibly an additional encoder on the motor
• How should the control and feedback loops be structured for this setup?

I would appreciate any recommendations regarding:

• encoder types and placement
• control loop architecture
• practical LinuxCNC / Mesa hardware solutions for this kind of standalone rotary table

Perfect, thanks!!

Thanks for your replies.
in my case delta etheecat asda a3e give me resolution om the motor at output on ethercat. In asda soft avaible option mul/div parameters for recalculation encodee output, but every reboot servodrive thats parameters became to 1. So i calculated (all mechanical reduction and motors encoder resolution) scale-pos, it about 9 500 000 to receive correct move command execution. 

Of cpurse, maybe right way is to put parameters asda delta div/mul to scaledown , but may be there are some other way?

Not yet officially. Maybe by feb. Machine should launch late jan.

@ ihavenofish
Did you already put the bounty up for the jerk control?

The lspci report indicates the the board is accessible (as a 5I25)

Make sure that you leave the 6I25 jumpered for 5I25 mode or you will have access issues.