Hey guys… my hexapod has been sitting for a while… I pulled him off the shelf to give it a go and something is wrong.
Two legs are completly dead. The legs that are connected to pins 16-23 dont appear to have any power. It worked fine when I left it.
I dont have any idea how to debug… should I just connect a meter to the positive and negatives of the servo connectors?
has anyone else had anything like this happen?
You say they “dont appear to have any power”, but have you confirmed it by measuring ?
If so, the powerlines run on the surface of the card, se if there are anything broken between the 16-23 and the 24-31 (as they run on the same power).
Can you post a picture of the SSC-32? Are the jumpers for VS1=VS2 in place correctly or do you have separate power supplies for the two banks of servos?
Are you using servo wire extenders? The connectors may have come loose.
I am about to test the pins, no servo extenders on those servos.
so 15-23 run on the same power line?
i dont want to pull the hexapod completly apart just yet. I would assume the jumpers are set right since they were before and everything was working fine before the little guy went on haitus
how many power banks are there?
I have experience a lot of time jumper falling… You should check them. I have change some jumper to some that don’t fall when you flip it aroud… lol
So, the pins have power…
I have connected the ssc-32 directly to lynxterm to test before I posted any of this, and I get no response from anything plugged into those pins. If I plug the servos into other pins they work fine. So it seems no pulses are being sent to that set of pins?
I do have a usb oscilliscope, but have not used it as of yet and dont really know how lol
Ok probably need more info here
If you have try to use LynxTerm, do you have place serial jumper on the ssc-32 so that the serial port is avalible ?
would that make a difference if lynxterm can, and does connect to the ssc-32, and does move the other 4 legs?
That’s a bit weard…
Since it’s one or the other not both. It’s the botboard or the onboard serial port.
You where able to make legs move before with the controler ? (Minus the ones that don’t work)
And now without changing anything on jumpers it work with lynxterm ?
To test it I connected my pc directly to the onboard serial port of the SSC-32 and lynxterm could connect to it and move 4 of the 6 legs. The legs connected to pins 16 thru 23 dont respond, and they have power going to the pins on the ssc-32.
Everything was working fine when I set it up on the shelf months ago. It has literally just been sitting there not moving all this time.
Ok
I don’t know witch test you have made on lynxterm but have you try to click All-1500 ?
yes, and all pins between 16-23 dont do anything
23-31 are working ?
It sounds like U6 (74HC595 shift register) is dead. If you can measure VS power on these ports and no signal it have to be that chip since all the others work fine.
Yeah… everything else is
OK… so I broke out my usb oscilloscope and found that those pins have power but are sending no pulses!
What would cause a SSC-32 to sudenly stop sending pulses to pins 16-23?
update 2
I just updated to the 2.05GP alpha firmware, and those pins still dont work… any ideas? did it just die? how could it die just sitting around with no power?
Look There…!!!
He know what he is talking about… !!
