BZT - A Poor Quality Machine

[DuffelBuffelWuffel]

tbh I do not think that board is broken as i never have heard of one that broke.
Might be best to upgrade the firmware on the device and "start fresh" with new settings for the cnc. Just follow the manual.

I'm not sure if your machine has this:
http://www.bzt-cnc.de/en/shop/electr...e-mit-watchdog

But that could also be whats causing you trouble. It might be the watchdog or whatever tripping from "noise".

[fidia]

I will take a picture not of the inner electronics. I do not think it has this board

[DuffelBuffelWuffel]

You could send your cnc.ini file to the designer:
http://www.edingcnc.com/contact.php
He might be able to tell whats wrong.

Or ask a question (in english) on this forum:
http://www.cnczone.nl/viewforum.php?f=39

[fidia]

BZT have their own parameters that you copy to the CNC 4.01 folder when installing the software and the USB driver.

To reintall the firmware I assume you mean take out the board download latest version and write to board via USB?

[DuffelBuffelWuffel]

yes
You do not have tu "use" their values , this is just a "simple" 3 axis cnc , it is not rocket science. It might be something in their settings file that might cause the explainable "stall".

Checking the stepper wires / other connections is also wise.

[fidia]

The wiring seems OK as it runs OK when started up fresh. The problem only happens a few mins after running

[DuffelBuffelWuffel]

Yeah... I would contact bart eding on that subject .. this is quite weird
It also might it be that there is a bad connection and vibrations / current draw are causing the stall / step loss issue.
I would just check the resistance of the wires.