Fanuc and 5i25/7i77 couple

Ok thanks , so there are no link with the 24v start? I dont know if it's normal to don't have the 24v on prdy . Maybe it's generate after a signal? The pcb generate the 24v himself or Maybe I have forget to conect one transfo . I feel that strange .

This is the shematic about the cable between the 7i77 and the PCB.

It's from this document : s3.amazonaws.com/Icarus/DOCUMENTS/Fanuc_Manuals_1785.pdf

I have been try hard-wire prdy1 and2 so since the shematic i must have 24v on Prdy1? it's not what happens , I hva no volatge on prdy1 or 2.

I think my pcb is failure.

Thanks you it's works!! the probleme was from 2 wire in a cable for the X axis.

My motor move!!

But...during testing , one moto arrived on the end of the way and I have broken some transistor on the PCB I must to replace there . I have not 16000000 puls/rev but 2500 I was wrong . Its very complicated to mesure how many pulse I need to put in the case in the PNCconf for finaly have a correct scale. (I can't see inside the machine to see the leadsrew and pulley)

So, waiting the new transistor , I'm cheking about the spindle, and for taht I'm totaly lost.. On the 7i77 I have only 4 wire to drive the spindle ? the same as the axis?

Because on the cable ( CN1) between the 7i77 and the PCB its seems have a lot of information , and I do not understand the documetation.


What is the magnetic cabinet?

the documention , my unit is : a06b-6059-h002 cncmanual.com/fanuc-ac-spindle-servo-uni...nce-manual-65015e-2/