[GT390]

Hi I am looking for drawings of the 1980's PKS Digiplan / Parker 1340 004 03
DC servo drive board
can anyone help

Thanks

[kdaburlos]

I worked for Digiplan in the 80s, xfer when Compumotor aqquired them. Drawings... good luck. If you did get one, most likely all components are obsol.
kd

[GT390]

never managed to get it sorted, I have two machines, three of these in each machine, so six altogether !!

it keeps blowing the transistors off the heatsink, big short somewhere when it switches, but I cant find it,did manage to get most of the components, but got tired of trying to fix it

It needs someone who knows more about electronic circuits than I do


fancy having a go at it ????

[kdaburlos]

With out having a Sch. I'm taking a guess. I forget what the bridge looks like. It is probably uni-polar, maybe bi-polar. In either case you getting shoot through or crossover. You could look at the gate signals and on-off times for fets. Try slowing the gate signals down a little. Don't know what that will do to performance. Might keep the smoke inside!(flame2)(flame2)