Slaved axis, 2 steppers on Y axis with a PLC4x-G2 ? what about the XP23 connector ?

[pierantoine]

Ok, thanks for this informations, very instructive.
maybe you could write a "Cnc builder's guide" Book that "do's and don'ts" the beginner in electrical, mechanical aspects.. (seriously).

"It as nothing to do with the current setting" yes, for sure ! i was talking about the current of the signal,input signal current for an AM882 is typically 10mA, minimum 7mA minimum.

> Also the Relay will be fine with 2.2KW spindle
Good news ! +1 point for the PLC4X-G2

> I think you maybe don't fully understand what the relay is used for.?

yes it is not very clear for me, the confusion certainly come from the 30A relay for the spindle on the pmdx-126 and 10A for auxilliary,
maybe it is as you said "not recommended" but they do this just in case you want to do it, or something like opening the power circuit while the watchdog isn't received.
http://www.pmdx.com/pmdx-126

• Provides one 30 ampere rated electromechanical relay useful for spindle control
• Provides one 10 ampere rated electromechanical relay for auxiliary functions

But if using low current is safe and is the standard practice i'll do like that.