Difference between revisions of "Determining Argon hardware failure"
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#Measure resistance between J4 pin VP against BR,U,V and W. A typical resistance is between 100 kΩ - 10 MΩ. If resistance is less than 10 kΩ, there may be a failed IGBT. | #Measure resistance between J4 pin VP against BR,U,V and W. A typical resistance is between 100 kΩ - 10 MΩ. If resistance is less than 10 kΩ, there may be a failed IGBT. | ||
==SimpleMotion V2 port== | ==SimpleMotion V2 port== | ||
| − | SimpleMotion V2 port (J2 on argon) is protected by clamping diode (type NXP PESD5V0S4UD) that is identified as D19 in the adapter and Argon drive. That diode typically burns if 24VDC is miswired in the port or if faulty Ethernet/RJ45 cable is being used. Same diode exists also in the [[SimpleMotion V2 USB adapter]] and may be damaged as well. Sometimes fault propagates longer and kills also RS485 driver chip (Texas Instruments SN65176BDR) which is identified as IC4 on Argon and IC1 on SM V2 USB Adapter. | + | [[File:Argonj2schema.PNG|thumb|Schematic diagram consisting RS485 receiver and few other components connected to Argon's J2 port]]SimpleMotion V2 port (J2 on argon) is protected by clamping diode (type NXP PESD5V0S4UD) that is identified as D19 in the adapter and Argon drive. That diode typically burns if 24VDC is miswired in the port or if faulty Ethernet/RJ45 cable is being used. Same diode exists also in the [[SimpleMotion V2 USB adapter]] and may be damaged as well. Sometimes fault propagates longer and kills also RS485 driver chip (Texas Instruments SN65176BDR) which is identified as IC4 on Argon and IC1 on SM V2 USB Adapter. |
Typical symptom of failure is inability to connect drive through SimpleMotion bus (i.e. Granity does not connect). Sometimes D19 short circuits 5V bus to ground making devices appear completely dead. To test if the device still has life, removing D19 (and possibly IC1 or IC4) can be used to verify whether lights come on when voltage is applied to the device. | Typical symptom of failure is inability to connect drive through SimpleMotion bus (i.e. Granity does not connect). Sometimes D19 short circuits 5V bus to ground making devices appear completely dead. To test if the device still has life, removing D19 (and possibly IC1 or IC4) can be used to verify whether lights come on when voltage is applied to the device. | ||
Revision as of 21:50, 11 March 2015
If Argon (servo drive) refuses to operate in any meaningful way, it is good to perform few tests for the hardware to identify possible hardware failures.
Verifying AC to HV DC circuity
See Argon supply voltage troubleshooting
Testing power stage
Motor power stage and braking resistor output consists IGBT transistors that typically short circuit if they are damaged. Testing of such failure needs only a multimeter with resistance measurement function.
- Unplug all connectors from the drive at least 30 minutes before testing as residue voltages may disturb this test and pose a danger. After 30 minutes fully disconnected, ensure that voltage has been safely discharged.
- Measure resistance between J4 pin VN against BR,U,V and W. A typical resistance is between 100 kΩ - 10 MΩ. If resistance is less than 10 kΩ, there may be a failed IGBT.
- Measure resistance between J4 pin VP against BR,U,V and W. A typical resistance is between 100 kΩ - 10 MΩ. If resistance is less than 10 kΩ, there may be a failed IGBT.
SimpleMotion V2 port
SimpleMotion V2 port (J2 on argon) is protected by clamping diode (type NXP PESD5V0S4UD) that is identified as D19 in the adapter and Argon drive. That diode typically burns if 24VDC is miswired in the port or if faulty Ethernet/RJ45 cable is being used. Same diode exists also in the SimpleMotion V2 USB adapter and may be damaged as well. Sometimes fault propagates longer and kills also RS485 driver chip (Texas Instruments SN65176BDR) which is identified as IC4 on Argon and IC1 on SM V2 USB Adapter.
Typical symptom of failure is inability to connect drive through SimpleMotion bus (i.e. Granity does not connect). Sometimes D19 short circuits 5V bus to ground making devices appear completely dead. To test if the device still has life, removing D19 (and possibly IC1 or IC4) can be used to verify whether lights come on when voltage is applied to the device.
The parts mentioned here on Argon and SMV2USB may be replaced by person capable of desoldering and soldering SMT components.
