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 ?

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

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.

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.