getting started , latency and breakout board questions

logout is just " exit " correct

and then the log in is automatic

i tried exit,  and it shuts down the terminal window,   
when i open the terminal window back up ,  i think i am logged in automatically

and i tried the stty line again ,  no luck.  
 i power cycled and still no luk 

Does there have to be live activity on the serial port ??? for this to work?
 

what about   something like this

" sudo apt-get install minicom # Install if not present
minicom -D /dev/ttyUSB0 -b 115200 # Connect to device at 115200 baud

but replace the usb0 with S0, and then fix the rest  baud R, and parity, etc
 

i must be doing something pretty dumb,   i tried this on the ancient Dell D620  dual booted with windows XP and Ubuntu14? from about  years ago   and i got the same problem.    This is the known good computer to interact with the robot arm , but in windows XP with putty or the robot native software that i think was windows 95.    This native software is not perfect and won't compile a program, but it will run the arm from the terminal

So maybe it is not my current version of ubuntu12.

Please don't ask how i got the ubuntu 14.  

Ok this has got way off topic and is starting to get into topics far away from Linuxcnc.
For a detailed how-to on the use of the serial port please read this document.
tldp.org/HOWTO/Serial-HOWTO.html
This should cover everything regarding the serial port, the tldp site has a lot of docs regarding basic Linux usage.

Oh and please stop inserting random question marks, it's makes it hard to work out what you are on about.

thanks unknown,  Sorry.  Enough said.    Eventually i wanted to try and get this arm under LinuxCnc control,   So a tiny bit on topic,   maybe i should have led with that.   or started a new thread . 

my servos, BOB, and power supply should be in by the end of the week.   I have been reading about the HAL, and the stepconf wizard.
 I will be using the clearpath SDSK-2321S-RQN  DC servo

i am trying to read up on the  stepconf wizard?    that is next  , and  i need to  read the servo manual as well

thanks



 

One should always RFTM, it's a good practice to follow unless you are quite financially well off, have plenty of time to spare and have the patience of a saint.

Or some other poor sod is setting everything up and you have 100% trust in them.