Finally I found the problem, I'm very stupid, it was just the nut hurting the plastic before it the plate activate the Y min endstop (the following picture)
THANKS A LOT WILLIAM
Best regards Jauffrey
Problem on prusa i3 pro b
Re: Problem on prusa i3 pro b
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Re: Problem on prusa i3 pro b
Congratulations,Jauffrey.So glad to see that. 
-Keep your mind and try to test it. 
-Everything will be fun！-Support all Getech printer.
-You can ask me the questions and I will kindly reply.
-Respect others is the best way you can get help!
-Everything will be fun！-Support all Getech printer.
-You can ask me the questions and I will kindly reply.
-Respect others is the best way you can get help!