Choose between two PC's, both have issues

I ran a PC with 50k latency for quite a long time. Though eventually I ended up putting a Mesa 7i43 in the box. This kept all the interfaces the same but gave much better encoder counting. The improvement in step timing was less obvious as software stepping could max out the motors.

johanneshk wrote: Here's the result for the latency test script for computer 1 after putting in the Quadro 4000:

Code:

36005 secs servo min: -55.700 uS max: 55.100 uS sdev: 1.600 uS terminated latency-test ... ........... Closing browser firefox with WID of 27263366 terminated glxgears ... Done. .......... ================================================================================ Swap useage: prerun: 420, running: 420 ================================================================================ CPU core temperatures:

Seems like I'm on the right track now (?).

Kindly post the complete .hw file. Your excerpt ain't enough
greez
chris

Hello,

I've successfully cut a few things on my CNC. Very happy with it and Linuxcnc. Now I want to enable the Watchdog/charge pump on my breakout board .

The problem is: Something's not working, the CNC doesn't move and the LED indicating 'active charge pump signal' on the board isn't on. The board requires a charge pump frequency of at least 10kHz. If configured the charge pump on pin 16.

I set 'Base Period Maximum Jitter' to 40000ns which gives me a max step rate of 20kHz. This should be enough to create a charge pump frequency of exactly 10kHz or am I misunderstanding? I've created the configuration with the stepconf wizard (attached).

I've read elsewhere to remove 'net estop-out charge-pump.enable iocontrol.0.user-enable-out' from the HAL, but that didn't work for me.

Any ideas?

Thanks!

From your .ini file:


You would need a base period of of 50000 ns to get a 10 KHz charge
pump signal.

The current 62500 ns would give you 8 KHz

Stepconf adds a "bit extra for luck" to your base thread jitter number. You can edit the INI by hand if you need to, as PCW has suggested.