BZT - A Poor Quality Machine

**fidia** · 21-09-2015

Been doing some troubleshooting.

1. Power on software
2. Power on control unit
3. Enable drives
4. Home Machine - machine homes OK
5. Rapid machine to X, Y and Z limits - no problem
6. G28 to bring machine to home - axes stall.

I have backed rapids down to almost nothing and always stalls when going back to home. Def not a hardware issue as the machine never stalls going forward. Only coming back. Also stalls are in X, Y and Z axes therefore I cannot see it being a mechanical problem.

Going to email BZT again tomorrow.

**DuffelBuffelWuffel** · 23-09-2015

This is a electrical / settings problem , nothing to do with the machine.
It probably runs eding cnc , I and many others use the same controller with no problems.

Flyer:
http://www.edingcnc.com/upload/files...flyer_tech.pdf

Manual:
http://www.edingcnc.com/upload/files...n_v4.01.00.pdf

Motors are pretty sturdy ... so they probably are fine if there is a problem It would be in the driver / controller board (unlikely) or cabling.

You could also re-flash / update the firmware of the board ... not that It should do much but still.

Can you make video's or whatever of what is happening?
Than I can try to help you.

Also the Owner of Eding CNC is really responsive. If the controller really is defect he will probably be the one to help you out.

**fidia** · 23-09-2015

Took the machine apart today and did some tests.

Yes I think you are quite right that the control board it shot. There is also a BZT BOB.I cannot tell if this is broken.

I got a reply today after numerous emails and they asked for me to ship the machine back to them to fix. As the problem is electrical not sure why they would not just send out 2 new boards to try. Gonna cost us quite a bit to ship it back to Germany.

The boards are not too expensive but just going to send it back in any case.

http://www.edingcnc.com/products.php?productid=56

**DuffelBuffelWuffel** · 23-09-2015

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** · 23-09-2015

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

**DuffelBuffelWuffel** · 23-09-2015

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** · 23-09-2015

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?

**JAZZCNC** · 23-09-2015

Originally Posted by fidia

6. G28 to bring machine to home - axes stall.

Define what you call a stall.? . . . . Because the fact you can home contradicts this.!!

Are you sure it's just not stopping in a place your not expecting or are the motors actually stalling, has in making high pitch whining noise.?

**DuffelBuffelWuffel** · 23-09-2015

A short video could tell us a lot. This machine so so simple that there is not much that can go wrong.
Is the current limit of the driver maybe set to low so it trips and stalls the stepper momentarily?

And returning it ... you still have to pay the expensive shipping to Germany and back , It might be cheaper to hire / ask someone local to take a quick look.
If you find the defective item they will probably send you a new one free of charge.