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Ahh, I see. Thank you, I will bear that in mind.

Thank you; that possibility sounds worth exploring. I've scoured the pin out/in diagrams for the 96 way connector and the 50 way connector and can't find anything obvious that suggests an enable signal might be required. I will ask Baldor if they are able to offer any advice.

Failing this, I think ...

I'm not using the top board, just connecting directly to the 96 pin connecter on the bottom board.

So, Could it simply be that there is no enable signal present?

Wow, there'd be no need to go to that much trouble, but that's very kind of you to consider doing that; thank you!

Angel-tech: I am based in Bournemouth, UK.

Steve: Thanks for your reply. I've checked the fuse and it's fine. Therevdoesn't appear to be any damage to the chips.

I can;the switch moves from '0' to '1' as it turns on

When I turn the main power key, I have 29.5V across the ESR terminals at the Denstep card (wires 13 & 14, terminals 1 & 2 in the TB11, 28V AC input section).

Prior to turning the main power key, there is 0V across the same terminals.

So, as far as I can tell, the ESR appears to be doing it's job?

Thank you! I'll see how I get on, but might just end up buying a separate breakout board and spindle speed controller.

Oh, I see

They can still be turned by hand when everything is energised, which I guess points to a problem with the card?

I'm sorry, I'm a bit unsure of what you mean by locking? There is currently no response from the stepper motors at all when I try to jog the axes in Mach 3. Not even a noise.

Interestingly, if I remove all my connections on the 96 way connector and replace the top card, it seems to power up ok as ...

The connections between the computer and the Denstep card, I mean. Still no life out of the steppers

I tried another computer, but no luck.

The parallel port is wired directly to the 96 way connector on the Denstep card (no breakout board). All connections appear good.

Hi,

I previously managed to control the stepper motors in my Denford Micromill 2001 (2001 model) by wiring directly between the parallel port to the 96 way pin connector.

I accidentally earthed the Sprint spindle speed control and had to replace it (oops!).

The newly replaced spindle control ...

I am trying to convert my Denford Micromill (2001 model, Denstep control card) to run on EMC2, Mach 3, etc.

So far I have removed the top board and managed to wire up the parallel port directly to the 96 way connector on the Denstep card so I am able to control the stepper motors, as per guidance ...