Constant loss of position

sorry but I'm not very capable so I ask. I installed mesaflash, copied the script into the folder renaming the text file with "stepgend.txt",
From the terminal I entered mesaflash and typed "sudo mesaflash" to then call the script. I have no apparent result, if I measure the voltages on the pins they are fixed and nothing changes. the ip address of my card from linuxcnc file is 10.10.10.10. what am I doing wrong?


andrea@debian:~$ cd mesaflash
andrea@debian:~/mesaflash$ sudo mesaflash
[sudo] password di andrea: 
Mesaflash version 3.5.9
Configuration and diagnostic tool for Mesa Electronics PCI(E)/ETH/EPP/USB/SPI boards
Try 'mesaflash --help' for more information
andrea@debian:~/mesaflash$ chmod +x stepgens.txt
andrea@debian:~/mesaflash$ chmod +x stepgens.txt

in a terminal.

No sudo is needed with Ethernet cards.

I tried but I get very different values


Output 0 (now no connection)

DIR+/DIR-= 4.9/0.03
STEP+/ STEP-=4.9/0.03

Output 1 

DIR+/DIR-= 2.4/0.04
STEP+/ STEP-= 2.4/0.03

Output 2

DIR+/DIR-= 2.4/0.1
STEP+/ STEP-=2.48/0.048

Output 3

DIR+/DIR-= 2.3/0.048
STEP+/ STEP-=2.3/0.048

Output 4 (now use for X)

DIR+/DIR-= +3.9/-4.9         ????
STEP+/ STEP-=+3.9/-4.9    ????

You have a damaged driver chip (U5 or U7) or incorrect wiring
(did you ground DIR+ or DIR- ?)

You can check it its a wiring error by unplugging the connectors.
If you still don't get a differential output like channel 4 (+ and -  >2.4V))
Either U5 or U7 have been damaged and its surprising channels 1,2,3
still work

one moment, let's try to understand each other well otherwise I'll make a mistake. should I measure between step+ and step- / dir+ and dir- or gnd - Step + / gnd- step- etc? because then I have different values. Or another way? sorry but I'm not familiar with this, if you tell me precisely what I need to measure I'll be grateful.

Its probably best to measure between STEP+,STEP-,DIR+,DIR- and GND
You should get a positive voltage in one state and a voltage close to ground
in the other

If you measure between say STEP+ and STEP- you should get
a positive voltage in one state and a negative voltage in the other state.
(as you did on channel 4). The fact that channel 4 acted very differently
than channels 0..3 is a pretty clear indication that U5 or U7 are damaged
(and may have been marginal for a long time)

Now I can't go and measure, but I just measured with gnd.
outputs 1-2-3 gave the same values, 2.3v and 4.8 V,
output 0 dir- and step-    0.05 V
Output 4   5v and 4.8v

These were approximately the values ​​I found

​​​

Yeah, from a distance I would guess that U5 (the driver chip  for STEP-/DIR- 0 0..3)
has been damaged as it looks like all 0..3 - pins are bad.

A cosa potrebbe essere dovuto? Cosa significano queste uscite danneggiate? Perché "sembra" che i motori facciano quello che dovrebbero fare, o almeno credo. Stai dicendo che devo comprarne uno nuovo?