Re: [CAD_CAM_EDM_DRO] Help, continuing to burn drives

Mine just did the same thing Friday afternoon , for the second time in 6
months , the machine was running fine I shut it off for lunch and when I
turned it on after lunch the 4 amp fuse blew so I replaced it , blew
again I disconnected the motor to see if it was shorted and it still
blew the fuse .
This is exactly what happened 6 months ago and Mauriss replaced the
drive because it was only 2 months old .
I have checked the stepper with a meter and it checks fine just like the
rest of the steppers !
Both times it was the same axis Z .
???????
Ron

Keith Clark wrote:

>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
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