So I have been trouble shooting issues with the servo drives (TRA31 and 41) for a while with no progress on a VQC 20/50B but just recently had the issue change (not sure if I did something to make it worse or if I am eliminating issues which is allowing me to find new issues).
It used to have intermittent drive faults but recently changed. The machine started faulting out on power up (x axis fault), so I swapped the drive (which had already been done once before). The machine now powers up and comes up ready, and drives don't fault, but when you try to move an axis, the control will show that it is moving but nothing actually moves. Then the machine will eventually fault because of servo lag.
So I started looking upstream, there is power to the servo drive power supply (PU31) but P and N appear to only have a couple of volts on them (does anyone know what voltage they are supposed to at?). I tried resetting the breakers, checking the fuses with no change. I then swapped in a different power supply from a parts machine (I don't know if it was working), still no change. Also if I turn the power supply main breaker off the machine still functions the same, which continues to lead me towards the idea that either there is an issue with the power supply or something that controls/turns it on is not working.
Sorry for the novel, any thoughts?
Thanks
It used to have intermittent drive faults but recently changed. The machine started faulting out on power up (x axis fault), so I swapped the drive (which had already been done once before). The machine now powers up and comes up ready, and drives don't fault, but when you try to move an axis, the control will show that it is moving but nothing actually moves. Then the machine will eventually fault because of servo lag.
So I started looking upstream, there is power to the servo drive power supply (PU31) but P and N appear to only have a couple of volts on them (does anyone know what voltage they are supposed to at?). I tried resetting the breakers, checking the fuses with no change. I then swapped in a different power supply from a parts machine (I don't know if it was working), still no change. Also if I turn the power supply main breaker off the machine still functions the same, which continues to lead me towards the idea that either there is an issue with the power supply or something that controls/turns it on is not working.
Sorry for the novel, any thoughts?
Thanks