Help, continuing to burn drives

Hi Guys, My bridgeport retrofit continues to burn Gecko drives. It
happened just a few minutes ago when I powered up the machine and
computer. The powersupply was plugged in but the relay controlling
the powersupply was off. When I hit the button in the software to
turn on the relay the Gecko immediately burned as did the protecting
fuse. It always happens on the y axis when I first start up. It
never seems to happen while running the machine. This is at least the
fourth time this has occurred. Each time I think I have found the
problem but alas, no. The last time was early Feb and then again
last week. A new Gecko was installed thursday. It makes no sense
why the thing would run for a month with no trouble. It think
everything is installed correctly but there must be a powersurge from
the powersupply when the relay first turns on. Is this a possibility
and is there a way to protect from this?

Thanks for any ideas!

Keith Clark