Baldor F391 troubleshooting

Information and questions about Denford CNC Control electronics, general electrical issues, cables, diagrams, stepper motors, drives etc...

Moderators: Martin, bradders, Steve, Mr Magoo

Post Reply
robertjenkins
Posts: 10
Joined: Fri 16 Apr , 2021 13:28 pm
Hardware/Software: Denford Micromill 2000

Baldor F391 troubleshooting

Post by robertjenkins » Fri 16 Apr , 2021 13:33 pm

Hello

I have a Denford Micromill 2000. I think I have blown up part of the driver board (the bottom one). Symptom: the X axis stepper does not move but only makes a whirring noise. If I plug the X axis cables into the Y axis socket (and vice versa) the problem gets transferred to the Y stepper. So obviously the motor and cables are OK.

The board is marked as Baldor F391 issue 2. Is there anything relatively easy I could try (eg replace a component or two?) Alternatively if I am trying to source a second hand replacement board, does it have to be issue 2 or will and issue 1 version work?

robertjenkins
Posts: 10
Joined: Fri 16 Apr , 2021 13:28 pm
Hardware/Software: Denford Micromill 2000

Re: Baldor F391 troubleshooting

Post by robertjenkins » Fri 16 Apr , 2021 15:28 pm

OK having read a bit here it looks to me like either the 297 or 298 chips might have gone. I will get new ones but I cannot find any documentation which shows in each case which chip on the board control which axis.

Martin
CNC Guru
CNC Guru
Posts: 1804
Joined: Fri 24 Feb , 2006 17:09 pm
Location: Brighouse

Re: Baldor F391 troubleshooting

Post by Martin » Fri 16 Apr , 2021 17:01 pm

I don't think we have any information on that either.

We used to return them to Baldor for repair.

robertjenkins
Posts: 10
Joined: Fri 16 Apr , 2021 13:28 pm
Hardware/Software: Denford Micromill 2000

Re: Baldor F391 troubleshooting

Post by robertjenkins » Fri 16 Apr , 2021 17:16 pm

Thanks - someone has previously posted a picture identifying the Z chips which means I have a slightly better than 50 per cent chance of guessing the X and Y, assuming they are placed in a logical order.

But - do you know whether issue 1 boards are compatible with issue 2?

Martin
CNC Guru
CNC Guru
Posts: 1804
Joined: Fri 24 Feb , 2006 17:09 pm
Location: Brighouse

Re: Baldor F391 troubleshooting

Post by Martin » Sun 18 Apr , 2021 11:25 am

Yes they can be swapped over if that is what you are asking.

Post Reply