PayneTrain
commented
11 years ago From Maxon, will perform this test when I'm in at 4:30 today:
Dear Chris Payne
It looks like the internal +5V DC/DC converter is overloaded by a damaged consumer load or by an external short circuit. The "clicking" noise could be the reset of the component. Step 1: Disconnect all connection up to +Vcc [J1/13] and GND [J1/12]. Disconnect all signals [J1], motor [J3], and communication[J2 and J15]. Switch on the power supply +Vcc and measure the +5V [J3/2] against Gnd [J3/3]. In case you measure +5.0V and the Green or Red LED shines bright start to connect each wire by wire until the "clicking" starts again. In case you measure a voltage lower than 5.0V there must be an damaged component on the EPOS2 PCB. Please send it back for repair. Contact maxon precision motor in USA for fast replacement.
Best regards mmc-support team Patrik Gnos
Emailed Patel, opened issue with Maxon:
We have a problem with one of our new EPOS 24/2 (#390438) controllers that must be resolved ASAP.
Using a DC power supply, if we hook the EPOS controller up to power at 18V the EPOS draws 20mA of current and the status LED light glows a very faint green. A soft "clicking" noise can be heard coming from the controller and no connection over USB to the EPOS Studio program for windows can be established.
If I unplug the J3 connector that leads to the motor/encoder enclosure, the same characteristics exist with the only change being the "clicking" noise becomes quieter.
The EPOS controller has not been exposed to more than 23VDC and is protected by an external 3A fuse in addition to the internal fuses within the controller. It was operating fine earlier today over the USB-CAN connection using the Linux API.
It does not appear that an internal fuse has blown in the controller given that it is still drawing 20mA of current which could not happen if the circuit was broken.
Please advise as to what we should do to fix this problem as we expect these controllers to reflect the quality and reliability that Maxon products are known for.
Thanks,
Chris
Maxon:
Eröffnungsdatum Status Kategorie 11.03.2013 18:39 1. Open ES:Controllers.Positioning Control Unit.EPOS2.Installation and Hardware.EPOS2 24_2 Zusammenfassung EPSO 24/2, Faint Green Light, "Clicking Noise"- Not operational Problem/Beschreibung We have a problem with one of our new EPOS 24/2 (#390438) controllers that must be resolved ASAP.
Using a DC power supply, if we hook the EPOS controller up to power at 18V the EPOS draws 20mA of current and the status LED light glows a very faint green. A soft "clicking" noise can be heard coming from the controller and no connection over USB to the EPOS Studio program for windows can be established.
If I unplug the J3 connector that leads to the motor/encoder enclosure, the same characteristics exist with the only change being the "clicking" noise becomes quieter.
The EPOS controller has not been exposed to more than 23VDC and is protected by an external 3A fuse in addition to the internal fuses within the controller. It was operating fine earlier today over the USB-CAN connection using the Linux API.
It does not appear that an internal fuse has blown in the controller given that it is still drawing 20mA of current which could not happen if the circuit was broken.
Please advise as to what we should do to fix this problem as we expect these controllers to reflect the quality and reliability that Maxon products are known for.
Thanks,
Chris Historie Kontakt Datum Aktivität Beschreibung
Payne, Chris
11.03.2013 18:39 Initial Contact: Payne, Chris Email: cpayne@Princeton.edu