QL with a very unusual expansion board

[Andrew]

QL with a very unusual expansion board on Ebay
I presume this is some custom industrial expansion board - Does anyone knows what this might be?

[Pr0f]

My guess would be stepper motor controller and driver...

[Martin_Head]

The screen shot says it's an engineering company.

Could it be a IEEE interface for driving things like milling machines.

[dilwyn]

I asked my son, as he works with modern engineering machining systems. Not being a QLer, he couldn't identify it specifically, but agrees with comments made about what it might be. He says that there is still a company called Hurn Brothers (engineering) Ltd in Dereham, Norfolk UK, although that might be a coincidence of names.

CST made a SCSI interface for QL back in the 1980s, though this doesn't look like the pictures I've seen of those.

A SCSI interface would commonly have a 50 pin connector.

Hope whoever won this auction on eBay is on here and can give us the lowdown on what it was!

[RWAP]

Would be worth contacting the engineering company to see if they have the software still (or even any QLs still in use!)

[Ruptor]

I presume this is some custom industrial expansion board - Does anyone knows what this might be?

Probably servo motor control as steppers were not so prevalent back then when CNC were coming in.
https://united-kingdom.exportersindia.com/stebon-ltd/
https://www.daxautomation.co.uk/part/pa ... d40/338615

[tofro]

I think the question is mainly about the QL expansion board.

Without the two obviously missing chips, what remains is the EPROM and a bit of address decoding, and it's nearly impossible to tell what might have been in the two empty sockets. But they somehow yell "UART" at me. In the mid-1980s, serial comms was ubiquitous in controlling machinery. From the pin count, the missing chips could very well be Intel 8251 UART chips.