Hi all,
Ive owned my dspmc for about 4 years running stepper motors,
sadly it is discontinued,
now i have dmm servos running on +/- 10V analog torque mode
but im still confused about star grounding multiple drives please if any one is still running a dspmc a little help to understand
would be much appreciated!
is my real world ground wiring interoperation of star grounding multiple servo drives with dspmc correct ?
things that I'm most confused with are:
should my signal (com) ground bus be bonded to my earth ground power bus?
how to test if my switch mode power supply is already internally got com bonded to earth ground creating a ground loop?
ground symbols in AnalogDriveConections.pdf from vital systems don't seam to match standards eg, attached image
taken from the dspmc manual :
in order to filter the electrical noise from motors, drives and vfds, the GND (common)pins on j2....j7 should be tied to the
earth ground at multiple points.
the following example shows GND pins on j2 tied to earth ground.
in addition, the power supply negative terminal should also be connected to any of the j2..j7 GND pins at two or more
terminals
trying to achieve this without creating ground loops not so easy
best regards
Amyl