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  • Rocky
  • Rocky
28 Apr 2025 13:59
Hi everyone was created by Rocky

Hi everyone

Category: General LinuxCNC Questions

I bought a used workbee with a mesa 7i96 board and I have never used linux befor, I got linuxcnc loaded on an old laptop and started working on the board, the previous owner lost all his files in a move so iv tried to figure out how he wired it but he can't rember how he did it.  I got to the point were I can jog moters, I am now onto endstops and I'm lost, I used the pnconfig wizard to set each endstop on its own pin(micro switches power to com and pin to nc) the only thing he left hooked up was the estop on pin 0 but it's backwards(pushed in let's me power linuxcnc in axis mode) and the ssr for the water pump(220v vfd, water cooled spindle and pump), some of the wiring he left on the out row i don't understand and iv looked for days to see if I could find any guides he may have used.  If any one here knows this board we'll and has time to help me id really appreciate it.  I know linuxcnc isn't the best choice for a new cnc owner and new to linux(I'm use to marlin for 3d printers) but I'd like to try and make this machine come back to life.  If this is posted in the wrong spot please move it to the right spot(new here)
  • abi9624
  • abi9624
28 Apr 2025 13:05
AC Servo tuning - Joint 0 following error at high velocities was created by abi9624

AC Servo tuning - Joint 0 following error at high velocities

Category: Basic Configuration

Hi,
I am a newbie to Servo tuning. I made a linear guide (Travel length: 500 mm) and attached servo motor to it.

Servo Motor: Inovance MS1H2-10C30CB-A331Z-INT with 23 bit encoderServo
Drive: Inovance SV670P
Mesa card:7i97T

Servo drive is configured in speed mode and controlled through analog voltage - 10V. Followed the Servo tuning guide from this forum and tuned the P, FF1, FF2 values. Tuned with a displacement of 5mm.

This setup works upto 3000 mm/min for both continuous jogging and fixed length. Above 3000 mm/min, i am getting Joint-0 following error during continuous jogging and less error for small lengths and frequent errors for larger lengths.

I doubt whether the tuning is correct or not. Help me to solve this issue.

I have attached servo drive manual, INI file, HAL file and Hal Scope screenshots at 2880 mm/min and 6000 mm/min for both 5mm and 50 mm jogging.

Thanks in advance.  
  • DarkPhoinix
  • DarkPhoinix
28 Apr 2025 12:54 - 15 May 2025 14:46
[SOLVED]linuxcnc Latency test ambiguous results was created by DarkPhoinix

[SOLVED]linuxcnc Latency test ambiguous results

Category: General LinuxCNC Questions

 
 
 
   
I have run various tests with different commands to check the latency but I don't know if I'm doing things correctly:
stress --cpu 4 --io 4 --vm 4 --vm-bytes 1024M --timeout 120s

[code]chrt 99 ping -i .001 10.10.10.10 -c 40000000

with stress I get good results with all the cpus at maximum usage, instead with chrt even if the cpus are not busy I see disastrous latency.
what should I do (kernel parameters, kernel recompilation)? the PC is not good for LinuxCNC?
If I don't use hardware parallel port and use NVEM, does this latency matter for operation?

my hardware:
motherboard: P8H61/USB3 R2.0
CPU: Intel(R) Core(TM) i5-3470 CPU @ 3.20GHz
VGA: VGA compatible controller: NVIDIA Corporation GF119 [GeForce GT 610] (rev a1) (Driver NOUVEAU)
Controller: NVEM V5
[/code]
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