Trouble when I cut large files - fails down or up Z axis

rodw wrote: Like everyone else, My money is on lost steps on the Z axis. In my experience, this usually happens on up travel with the weight of the Z axis pushing down.

That is the general consensus regarding the issue, but he is adamant otherwise!
Although someone mentioned it here, it could be memory and that would be very hard to pinpoint, it could also be memory controller on the motherboard and that is even harder to localise.
One more thing to check is the HDD, if it is failing it will cause latency issues.
Did you get a warning about latency excursions ?

tommylight wrote: Did you get a warning about latency excursions ?

no any latency warning I didn't have

rodw wrote: Like everyone else, My money is on lost steps on the Z axis. In my experience, this usually happens on up travel with the weight of the Z axis pushing down.

In last case my Z axis fails UP not down, it hapens not very often but it happens.

Wait, what microstepping is set on the drives ? And what drives ?

to provent this we use a G4 P0.5 at Torch off
so the maybe regarding high emi does not interrupt the Z drive
this happens only on Z where the touch off is mounted
at least on our 5 plasmas

tommylight wrote: Wait, what microstepping is set on the drives ? And what drives ?

400 impulse per round, chinas noname 7 Amper 90 volt

zaxlex wrote:

tommylight wrote: Wait, what microstepping is set on the drives ? And what drives ?

400 impulse per round, chinas noname 7 Amper 90 volt

That is OK.
Thank you.

its my config may be helpfull

My first thought was that this might be temperature dependent, but running the same cycle from subdivided files seems to eliminate that possibility.

Is there anything in the dmesg log to indicate a problem with the HDD or memory?

Also, put a mark across the joint between the shafts and couplers, just to be sure that this isn't a mechanical problem with something slipping when hot.