Retrofitting Maho MH600E 1989 - Meas 5i25 & 7i77

tommylight wrote:

Onkelmat wrote:

this is the situation:
- Maho mains is ON
- the vent for the electirc cabinet is running low, nothing is active. Only power supplies of the maho are energized 19K1 not latched.
- i start Linux cnc
- when the Linuxcnc Splashscreen closes -> restart.

That is telling you exactly where the problem is......

Onkelmat wrote:

1. So this implies something from Linux triggers the restart.
2. I´ve then deleted almost the complete HAL but linux rewrites it..
3. Is there a documentation what LinuxCNC does with the cards on initial start ?
4. Or can i monitor it ?
5. So I think linux is doing something to the cards that causes a restart.

1. Yes it does, but it is not Linux at fault.
2. Why would you delete the complete hal? and Linux will not rewrite anything if not explicitly told to do so.
3. Yes there is, but on a lot of documentation for both the LinuxCNC and cards in use.
4. Yes, you need a DVM with memory function or min/max function.
5. ............... i see PCW has already replied
-
-Plug the PC on another socket in the shop, preferably not the same phase as the Maho,
-find another PC to test with, they are 50$ and up, so not worth the time lost chasing gremlins,
-if you do have a DVM with the above functions, monitor the 5V supply for both min and max values, under no circumstances they should deviate by more than 5%, or from 4.75 to 5.25V. I think for Mesa that should be even lower, like 2%.
-check if the PC power cord has grounding, do not use anything without ground on a machine.
-power the PC and 7i77 without powering the Maho, see if you get restarts. If yes, throw that Pc and get a new one. If no, something is wrong with one of the above or with the wiring/grounding or the supply voltage is dropping to the point of resetting the PC when Maho is turned on.

Did you try any of those things???????????????????
It is getting tiring to see so many replies to help you being ignored by you and insisting that LinuxCNC is at fault. It is not.

I can bet my life you have something wired wrong with that latching thingy that is back-powering the PC the instant it activates.
But you can continue to chase LinuxCNC......

Then I've run my linuxcnc configuration I'm using all the time and ou of 10 tries it crashes like 7 times right on splashscreen.
Then I've tried the axis_mm configuration by right click on linuxcnc and choosing one of the axis basic settings.
I could start linuxcnc 20 times without restart.
Then ive tried my config again and got instant restart.

I'm sure my ini or config have a problem.
I'll try to post both of them

So just to get this clear. Your PC only crashes if you use your own config? If so clearly something is happening when the cards and their outputs are initialized during the startup process.
So posting your config would not be bad idea. Also you might want to pipe the terminal output of the startup of linuxcnc into a file and post that. That way we might get an idea what is being started just before the PC crashes.

[edit]
As Tomy has already suggested there is probably something going on with how you wired the thing up that feeds back to the PC
[/edit]


Personally I would create a new hal file and copy in sections from the current hal file you are having problems with while testing if and when the restart problem comes back.

Proper grounding techniques are indeed very important (as I had to learn the hard way many years ago) and without a clearly structured approach how you want to go forward you could be poking around in the dark for a very long time.


So I strongly suggest to create an new hal file and reassemble it step by step with frequent testing. Then once the rebooting happens again you can take a step back and analyze what is happening.