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Little machines always look much more beefy and pro with way covers.

I think you have to adjust servo tuning either way. There are parameters impacting speed loop, which is used in velocity mode. In position mode there is extra position loop.

If using position mode, you will have to adjust servo tuning and following error in the servo drive

mb2hal may work

ok M61 Q99 solves that problem all good for now
thanks again for the help guys

2. Yes you can mix The 7I97T MPG input   with other functions
(the MPG encoder counts on the other MPG inputs may change
with the selector switches but they can be ignored since you
are only using 7I97 MPG encoder 0)

3. No the isolated inputs are single ended only

Hello,

I'm building my first LinuxCNC project which is a CNC conversion of a Precision Mathews mill using DMM AC Servos and their DYN4 drivers driven in Analog mode.  I am using a Mesa 7I97T and 7I76. The 7I76 will primarily be used for spindle motor control and additional inputs, if I eventually need them.

I am almost complete with wiring the control breadboard for setup and bench testing but I have questions regarding interfacing a MPG Pendant:

1. I see there are firmware files for the 7I97T+7I76, but nothing supporting MPG. 
2. My current layout is to interface the 7I97T MPG A- with TB4 Pin 1 and B- with TB4  pin 2 (+5V to 3), then use TB4 pins as inputs 4 thru 12 as sourcing inputs for the MPG axis and pulse multiplication switches (+24V to TB4 6,9, and 12).  Is this possible while having the card set to support the MPG encoder on TB4?
3. My MPG pendant encoder can be used double-ended. Is that possible on the MESA?

Thanks,

Skylor

can you also post the HAL code that you use to setup mitsub?

I have configured my ethercat z-axis to velocity mode and used pid to adjust the following error. The advantage of position mode should be that it can be used without much adjustment, while velocity mode requires a lot of adjustment.

Hi,every one ,I found a very good sample configuration in linuxnc in the following path Linuxcnc-Sample-axis-vismach-millturn-millturn. Though the sample is very suitable for our project,but when we tried to  use fusion 360 export the GCODE file,it can't be post processed or it can't be runned.Because there are  only  three post processor file in the fusion 's official lib, LinuxCNC (EMC2),LinuxCNC TurningEnhanced Machine Controller (EMC)
they all looks not fit for the linuxcnc's millturn sample configuration  .Because I'm not so familia with the post processor file cps .May there be anyone share some suitable fusion's post processor cps file for me ,I'll be very grateful for that,thank you .

With either cable connected, either way around, finger stressing the connection at the 7i96 socket interrupts packets.
The same stressing at the RPi socket is reliable.

I'm a little confused, If this is the case (clearly a hardware problem) , why are you looking for software solutions?

There is no network symbol anywhere, and I have searched.

I will later connect the RPi to the WiFi extender via ethernet and see if I can install Network Manager.

I am quite unsure about IP addressing.
The /8 mask and gateway entry are as returned from Terminal commands, and what I gleaned searching the Forum.

I will try the workshop desktop connected to the Mesa in 6 hours time, busy during the day.

My records seem to show the LC2.9.2 image was flashed to the SD card with RPi Imager.
I tried Balena Etcher, but couldn't get it to work.
I will do another SD card with a fresh download and RPi Imager to confirm.

rodw
Are you saying the RPi4 itself needs an update ?

Cold start in workshop, 15 degrees.
Changed W5 and W6 to default 192.168.1.121.
Used menu-config to remove gateway and change address to match.

ping results:
- 123 packets 0% loss,
- 391 packets 73 % loss.

John.

I want some non realtime i/o like jog buttons tool clamp button etc
How can use this rs485 i/o module without mesa card connected to rs232 port via rs232 to rs485 adapter?
What hal component needed?

alright, awesome thank you!

question, your previous images had the rt already installed, is there some limitation to why they arent this time, or is it so you can hit update before loading the kernel?

Hello,
i have EtherCAT setup with Delta B3 servos. There is option to go for Position or Velocity mode when configuring servo drives in xml file.
The position mode works straightforward, but the following error is quite big - up to 1mm depending on actual speed. Actually it is proportional - the faster you go, the bigger the following error.
The other option is Velocity mode, I guess you need to use PID component to be able to tune the velocity loop.
I only tried velocity mode on my other setup (mesa 7i95t with Delta B3L drives) and I was able to tune following error down to 0.00X mm at peaks.

So my question is, what are the pros and cons for both modes if its over EtherCAT?
Also how is following error calculated in position mode over EtherCAT?

I think lot of people go for linuxcnc due to ability to use EtherCAT, so deeper explanation for correct configuration would help to many of us.

Thanks