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Capacitor source & Non-music trouble shooting

3/29/2000 1:57 PM
CBS	Capacitor source & Non-music trouble shooting Hi Ampagers, I know some of you guys have industrial experience, so I thought I could ask a couple of non-music questions. 1.)Parts: I've got a sevromotor controller that keeps cooking the R-C snubber on the output transistors, I need a source for 0.22uF 400V non-polorized caps. 2.)Problem: The servomotor controller is part of a system which controlls a one-off machine, a combination of a lathe and dry ice blasting (like sand blasting). The system has 3 PLC's an Allen-Bradly SLC 500, a Vickers TDC 200, and a Siemens. It also has the Motion Controll Systems SA-5000 servo amplifier, a Dynapar MAX jr tach, and 3 Simpson Hawk II H235 DC process controllers. The system also has step down transformers, motor starters, a 15hp dc motor, a 10 hp hydraulic pump, hydraulic proportioning valves, solenoid valves, 45 solenoid relays, 12 intrinsic safety barriers, and pressure & vacum & position switches, and a 400 wire bundle(all blue), etc. The system exhibits strange behavior in all of the digital control devices exhibiting run time errors ~20%, when the system is running (motors, switches, heaters, etc.), but when each is isolated run without errors. This leads me to believe the problem is systemic not discrete components and that the root cause is the physical intergration of the system. There is no twisted shielded wiring, the main power transformers reside in an enclosure with two of the PLC's, and the ground system is 30' of series connections through 5 encloures. I think it could be either ground loops, current loops, induced currents, crosstalk, inductive voltage spikes, power factor current-voltage phase distortion (not the good kind, a goosed 12AX7), or a combination of all. My question is what diagnostic method can I follow to troubleshoot this?? I'm stumped, ANY help will be greatly appreciated. Thnx, CBS

3/29/2000 1:57 PM

CBS

Capacitor source & Non-music trouble shooting

Hi Ampagers,
I know some of you guys have industrial experience, so I thought I could ask a couple of non-music questions.
1.)Parts: I've got a sevromotor controller that keeps cooking the R-C snubber on the output transistors, I need a source for 0.22uF 400V non-polorized caps.
2.)Problem: The servomotor controller is part of a system which controlls a one-off machine, a combination of a lathe and dry ice blasting (like sand blasting). The system has 3 PLC's an Allen-Bradly SLC 500, a Vickers TDC 200, and a Siemens. It also has the Motion Controll Systems SA-5000 servo amplifier, a Dynapar MAX jr tach, and 3 Simpson Hawk II H235 DC process controllers. The system also has step down transformers, motor starters, a 15hp dc motor, a 10 hp hydraulic pump, hydraulic proportioning valves, solenoid valves, 45 solenoid relays, 12 intrinsic safety barriers, and pressure & vacum & position switches, and a 400 wire bundle(all blue), etc.
The system exhibits strange behavior in all of the digital control devices exhibiting run time errors ~20%, when the system is running (motors, switches, heaters, etc.), but when each is isolated run without errors. This leads me to believe the problem is systemic not discrete components and that the root cause is the physical intergration of the system. There is no twisted shielded wiring, the main power transformers reside in an enclosure with two of the PLC's, and the ground system is 30' of series connections through 5 encloures. I think it could be either ground loops, current loops, induced currents, crosstalk, inductive voltage spikes, power factor current-voltage phase distortion (not the good kind, a goosed 12AX7), or a combination of all. My question is what diagnostic method can I follow to troubleshoot this?? I'm stumped, ANY help will be greatly appreciated.
Thnx, CBS