CNC - Little trouble with circuit stepper motors

Hi! and thanks for this forum! I am from Buenos Aires, Argentina, i'm sorry for my poor english.

I'm trying to build a CNC Router with one Arduino Pololu A4988 + 3 + 3 Wantai Nema 17 motors.
I connected everything as follows:



The problem I have is the engine that ends up in pin 3 and 6 does not rotate, only vibrates ...

What do you recommend me to check?

Thanks and excuse me if this post is out of place

... check the current setting and correct pin assignment for CLOCK and DIR, the connection and if DIR changes the value when reverting the moving direction.

Switching the drivers across the axes can show if it's fault electronics or parametrics ...

---

Viktor
--------
Aufruf zum Projekt "Müll-freie Meere" - [reprap.org] -- Deutsche Facebook-Gruppe - [www.facebook.com]

Call for the project "garbage-free seas" - [reprap.org]