Ok we have an old turret lathe Schiess with a Siemens 840c controller been in service here a good few years, until water company cut through a mains cable cutting the power mid cycle.
After we got the power back on the machine would just not boot up fried the computer so we had it refurbished now everything works fine except for the fact after we run a program we can no,
longer jog spindle with the hand contol which obviously is quite important for clocking jobs in. If we switch the machine off and on it jogs fine till we run a program again. Any help would be much appreciated thank you.

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