Re: [CAD_CAM_EDM_DRO] Help, continuing to burn drives

Dan, I added the 100v 1000 uF that you specified to my 320's and the everything runs cooler now. Before, drilling holes with knee driven Z, the motor would get hot in 30 minutes. Now I can drill holes all day before it gets warm. The Caps across the inputs from the power supply are a must no matter how long the leads are. I lost a drive due to a current spike in the line. That hasn't happened since. Just soldered in a new cap in the drive and its working fine again.

Ron

Dan Mauch <dmauch@...> wrote:

Did you have the 470 uf cap on the power and ground leads of you G201?
A few years ago I had a 201 setting on a heatsink and was doing some testing
after repairs for a customer. It wasn't my standard set up. The power leads
were about 14" long. I had the case off the G201 and while running a motor
found the internal 100 UF cap was getting really hot. So I installed a 470
cap across the power terminals like Mariss says to do in the G201 manual and
it cooled right down. That external cap is really important.
Dan

----- Original Message -----
From: "Ron Kline"
To:
Sent: Sunday, April 03, 2005 1:49 PM
Subject: 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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