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You need only to lower the voltage a little bit for the Level-Shifter with a Diode or two Resistors,
the FPGA can handle up to 3.3V input and the Level-Shifter need to detect 1.8V as high.

but after applying G54 on X, it becomes a mess:

This issue is a known limitation of the feature. Please read paragraph 11 the documentation I posted above.

I hope this video will make more clear what is happening, I have no issue with g-code from CAM, machined parts are ok, only display section is a bit off in my case:

Hello, i am new to the linuxCNC systems.

I wish to build a simple rotating axis controlled by linuxcnc gcode. And i have a external robot which would perform some machining operations on the rotating part.

Now i want to sync both the machines. such that when i start the robot, the linuxcnc should also start executing the gcode.

Is it possible to execute the gcode when an input is provided through one of the parallel port input pins?
does the M66 code work here?
how to then pause the program if i pause the action of the robot (incase i have to e-stop the robot) and how to make sure then that the gcode is resumed from the paused location once the robot restarts and sends execution trigger to the linux cnc.

tommylight wrote:

A shot from the hip, but usually those drive/steppers will have wrong encoder wiring, would be prudent to double check.
 

Hi tommylight,

It just so turned out you were right: one of my encoder wire were loose, I tightened it on the CL57T-V41 driver and it behaves now.

This is the wiring diagram:




My References for the Wiring Diagram:

1.

From 34:14 CL57T Driver Overview.

2. help.stepperonline.com/en/article/wiring...tepper-motor-4cddqy/

The first CL57T diagram.

3. pypi.org/project/cl57t-raspberry-pi-stepper-drive/

See the table for signal pins to the Raspberry Pi 4B.

And I have learned to work the ENA+ pin: setting it to low to enable, to high to disable.

The Python code below turns the motor 1 revolution, pauses for a little then keeps on turning till Control C to stop.

If I changed [ gpio.output( ena_pin, gpio.LOW ) ] to [ gpio.output( ena_pin, gpio.HIGH ) ] the motor won't turn.

Now I am trying to figure out why I need 1600 to do one revolution, it is about how the DIP switches are set, I have to understand the table in the manual

Thank you and best regards,

...behai.

[
# 08/11/2024
#
# Enable by setting ENA+ pin to low. Expected: motor will run.
#
# /usr/bin/python3 nema23_04_ena_enabled.py
#
from time import sleep
import RPi.GPIO as gpio

direction_pin   = 13
pulse_pin       = 6
ena_pin         = 19
cw_direction    = 0
ccw_direction   = 1

gpio.setmode( gpio.BCM )
gpio.setup( direction_pin, gpio.OUT )
gpio.setup( pulse_pin, gpio.OUT )
gpio.setup( ena_pin, gpio.OUT )
gpio.output( direction_pin, cw_direction )

# Enable.
gpio.output( ena_pin, gpio.LOW )
# ENA pin must be ahead of DIR by at least 200ms.
sleep( 0.5 )

try:
    while True:
        print( 'Direction CW' )
        sleep( .5 )
        gpio.output( direction_pin,cw_direction )
        for x in range( 1600 ):
            gpio.output( pulse_pin, gpio.HIGH )
            sleep( 0.0001 )
            gpio.output( pulse_pin, gpio.LOW )
            sleep( 0.0001 )

except KeyboardInterrupt:
    # Disable.
    gpio.output( ena_pin, gpio.HIGH )
    gpio.cleanup()
]