Troubleshooting RPi + mesa 7i76e + omc steppers

Hello everyone,

I'm trying to build a 3 axis CNC based on a killerbee  mechanical kit. It is the first time I'm building such a thing. I've decided to really on linuxcnc in order to learn as much as possible on all topics from electrical to electronics and how to build an autonomus machine in general that could help me to tackle more ambitious wookworking projects. 

Actual setup

• RPi 4 that runs linuxcnc (i've followed this documentation )
• A mesa 7i76e
• 4 drivers OMC stepper online CL57T
• 4 nema 23 motors OMC stepper online 23hs45-4204D

The problem


I'm struggling at troubleshooting what's wrong with my setup. To summarize what i've done so far
1. create a basic config for the mesa with all values by default in order to make the X motor moves
2. use the X axis tune for find the right values to prevent the drivers to to itself in safety mode (it blinks 7 times)

Based on the driver documentation blinking 7 times means any of this situation

1. The acceleration time setting is too small, increase the value of appropriately;
2. Motor torque is not enough or motor speed is too high;
3. Motor wiring error, check wiring

I've tried all of these without sucess.

I've got the impression that I miss something big but I can't tell what. Do you have any idea on how to troubleshoot this?

www.youtube.com/shorts/4NNmbMMivDk please find in real what's happening.

Thanks in advance for your help!

See my response to another forum member with the "7 blinks" issue

Wrong Encoder or Motor wiring...

First of all, thanks everyone for your reactivity this is much appreciated  

Indeed, it was a wiring problem of the encoder, the pinout was wrong like Spumco suggested it in another topic.

I thought I could trust OMC but in the end nothing could replace an exhaustive continuity testing of all motors.