Its a Parker Digiplan SD 2 driver !
Now repaired with faultless service.

I have tracked down these people,
www.vectis-systems.co.uk
Who will repair the driver for about £115, hope this may be of some use to anyone needing this kind of repair.

Thanks for all suggestions !
I have this morning swapped the X & Y drivers over & now the Y axis will zero & the X axis not, so it's pointing at a fault in the driver.
Anyone know if the drivers are still obtainable or of a circuit board repair service ??

Cheers, Neal

Denford, I think its a North east computers sourced unit.
Controls very similar to a Newing & Hall PN4E we used to have.

We have a 1986 Triac which is refusing to zero in it's Y axis !
Anyone have any ideas as to why this is & what a cure might be?
Many thanks !

If you have a cassette unit for sale we could well be interested !
PLease give me some idea of how much you are looking for !
PM me, ta !

Bit catch 22 Matt, all our progs are on tape & unless we can recover them they will all have to be re-written. Also as of yet we have not been successful connecting our Triac to a pc !

We have now stripped down the cassette unit & think we've found the problem.
There is a white rubber washer on the pinch wheel which has perished, hardened & no longer grips.
The washer is white 24 o/d 17.5 i/d & 1.75 thick.
Anyone got any ideas where such a thing might be obtainable ?
Cheers .

I emailed NEE on the subject & got this reply, hope it may be of some use ! We can refurbish your cassette for £195, sorry but that's the only option I can offer as the cassette is very obsolete. Regards, Richard S Olds NEE-Controls Ltd, 19B White Rose Way Follingsby Park, Gateshead, Tyne & Wear, NE...

I have a 1988 Triac & the cassette unit is going on the blink.
Anyone know if these can be sourced or re-conditioned ?
Ta !