So I've had a good read up on the L297 and L298s and I'm thinking they're the most likely culprit. I know I can go down the IC swap route, but before I break out the soldering iron, can I swap my Baldor F391 Issue 2 board for an F391 issue 1 from a Micromill?

Thanks!

Checked the output directly from the Denstep for each drive and am getting the following: Z Axis (AXIS 2) = 5V across each coil and physically working correctly Y Axis (AXIS 1) = 5V for only ONE coil (other motor coilreads 0V continually?) Guessing that explains the random direction choices? X Axis ...

Pulled the X axis stepper motor off and connected it up to one of the other axis motor terminal blocks. The X axis stepper runs perfectly when connected to the Y and Z axis outputs so it must be an issue with the X axis (AXIS 0) drive electronics. Can anyone help with diagnosing the issue? Checked t...

So I did a few tests on the machine today: - Checked the wiring between the orange connector blocks to the Denstep control board and the Harting plug and all looks ok so don't think it's a cable issue. - Did a check to see if the steppers are all 'working' by putting an LED across the motor coils at...

Also, is there a source for belts? All the ones I've looked at so far on the machine are past their useful life and permanently deformed. Do Denford sell a belt kit with XYZ and spindle belts? I know I can source them myself but curious if there's spares kits available before I go hunting through ca...

Finally got time to work on the machine so I've done the following: Opened back cover and manually moved the Y axis which was sticking. With it freed up I cleaned and lubed the slideways and it now moves back and forward nicely. However, the axis doesn't always move in the direction I ask via the De...

Hi all - I've recently took a punt and purchased a Novamill from a model maker who said he had never gotten the machine working and it's likely that the machine has not moved in 15 -20 years. It's an ATC version from 2000 with Denstep control box, lots of original floppies and FANUC desktop tutor ke...