gokhan
Junior Member
Posts: 89
|
Post by gokhan on Sept 30, 2016 16:09:39 GMT
The wiring looks great. Did you check for shorts? Since you lost the analog feedback you should check the what voltage the position sensors output, with the amc1280usb connected and without. 1. With sensors Vout connected, measure the voltage on the Vout of each sensor while manually moving the potentiometers. 2. Just leave the +5v and Gnd connected on the sensors and measure the unconnected Vout right on the sensor This will ensure that it wasn't a bad sensor responsible for the analog lines failure. Thanks Thanos I can't read 5 volts anywhere. It measures 3-4 volts at 5v. pin. Tomorrow I will bring a more sensitive voltmeter and measure it again. I couldn't read anything senseble from the sensors Vout disconnected. Can it be that I fried the sensors too? Still I don't get how it Works with miniservos. Is it normal to have "analog servo" displayed on right hand side of the display? even when jumper 2 is on or off?
|
|
|
Post by tronicgr on Oct 1, 2016 15:29:57 GMT
You should read at least 4.8v on the 5v pins. If it's less something is shorting.
The sensors need 5v to work properly. Do you have a clean 5v source to test them? Maybe they are not fried.
As I said before, I'm afraid something is burned in the microcontroller and all its internal Pullups were damaged, thus the reason the analog servo mode comes on with or without jumper on S1.
Perhaps there was a back current from the inverters (power surge during powering them on and off) that went via the amc1280usb ground path. Can you check your inverters ground to make sure is well grounded?
Thanks Thanos
|
|
gokhan
Junior Member
Posts: 89
|
Post by gokhan on Oct 3, 2016 17:41:07 GMT
I tested all the sensors with a benchtop power supply, they are all gone I also found out that ground of inverters was loose, I am not sure how loose it was but once is enough right. So new wiring and new hardware and some good luck. Thanks for all your support I will keep on mechanical assembly till new electronics arrive. I will post some pictures of my setup on the relevant page.
|
|